Su authentication failure ubuntu. root and admin, admin does not have su permission.
Su authentication failure ubuntu lists the directories) [email protected]:~$ sudo -s [sudo] password for @AlakanandaS useradd doesn’t create a home directory for the user among other things You figured that out already The other thing you need to know is the default shell might be dash(/bin/sh) and not bash so you might need to change your shell with chsh useradd -D should print the default shell assigned by default and echo $0 should print your current Question: I’m unable to do su – on Ubuntu. This is to say that it has no password (which is different from it having a blank password) and no attempt to authenticate with root's password will succeed. 04. list: also report to the Principal's Office to discuss the authentication failure ;D If your ever keen to be amused building sudo from source with a patch enables sudo to be rude and offensive when you fail authentication attempts ;p if you have the root password and cannot login with su Authentication failure! 2. d/su and /etc/pam. su: Authentication failure Password is correct, but I can't log on anymore. Didn't try that after I deleted it because I figured having a sudoer would stop me from needing to use the prefix to use the command. d/su and commenting out this line: auth required pam_wheel. This can happen due to a typo, Here's an example of how to configure PAM-based MFA for the su command on an Ubuntu 22. Explore common su authentication failures on Linux and learn effective troubleshooting techniques, including configuring access control, implementing multi-factor authentication, and In order to solve this problem for good you need to change the su password. It seems like the binary su got the exec byte { [root@archiso /]# ls -l /usr/bin/su -rwsr-xr-x root root 71728 Aug 16 14:10 I have successfully added my machine to my company's domain. On my terminal, [email protected]:~$ su password: su : Authentication failure [email protected]:~$ ls -lth /bin/su -rwsr-sr-x 1 root root 36K Sep 12 2012 /bin/su But the following works: [email protected]:~$ sudo ls [sudo] password for user: (. I accidentally executed chsh -s /usr/local/bin/fish while on my system it should have been chsh -s /usr/bin/fish, but even though the first command warned that the shell did not exist, it still changed it to /usr/local/bin/fish in /etc/passwd. This fixed the isssue for me. I have tried all possiblities I can think of but always get: su: Authentication Failure su: Authentication failure on UbuntuHelpful? Please support me on Patreon: https://www. 04(ubuntu disable root by deafult, I have manually enabled it. The root account is just the default option. root@ci-web1:~# su - mxx su: Authentication su: Authentication Failure 14. com/roelvandepaarWith thanks & praise to God, and with thanks $ sudo -i [sudo] password for userone: foo # su usertwo $ who am i usertwo blah blah $ exit $ exit When connecting as usertwo. Anyone needing support for Ubuntu or the official flavours should seek help at Ubuntu Discourse (see below). And, as to the second thread, I checked everything that is said there, and updating root's password didn't help. You need to use a combination of sudo with passwd like this: su: Authentication failure This issue is encountered when trying to su to root. 9. Hope this helps. 04 Server. su: Authentication failure The sudo works and i can login to my users using ssh (ssh [email protected]) but cannot use su. 一般ユーザからスーパーユーザになって、管理者権限で実行したい。 やってみたこと. mount -o remount,rw / mount --all chown root:root /usr/bin/sudo chmod 4755 The short answer is found in the sudoers man page (type man sudoers to see the complete page):. admin is not in the sudoers file. User switching as non-root works again when this pam module is disabled for su. 71. 106 user=admin By default, the Root account password is locked in Ubuntu. 1 and pgadmin3 on Ubuntu Server 13. Script terminates the command without waiting for echo and as a result i get: su: Authentication failure Any help is much appreciated. I have no idea why successfully typing the correct password would increment the failure attempts, but it is. FTP help 12. superuser is very important aspect of any permissions that you ca After it downloaded the file, it reports an authentication failure and skips to the next task. I go to user groups and I see my name there and then "root" Stack Exchange Network. The script asks the user to For using su user1 as user2 you need to enter the password of user1 when doing this as standard user. やりたいこと. 8. – Ivan Cachicatari. Similarly, running a bare ubuntu image usually doesn't have much value since everything you've described here will be lost as soon as the container exits. In order to solve this problem for good you need to change the su password. @KshitizSharma, yes, it is a hole. When typing just su, you must enter the root password. When typing sudo su (assuming you are allowed to do that), you must enter your own password. phpMyAdmin 4. Trying su and sudo root doesn't work because,for security reasons, Ubuntu has disabled the whole idea of a root password. 04 (first time on Ubuntu). defs and set FAIL_DELAY N where N is a positive integer number (seconds). I have my normal "administrator", and another Guest account. Hi, 1) I have a simulation of enterprise network environment as the following:-LAN 1: 172. su is not an alias for sudo. So if you want to give someone root access without giving them actual root account password, sudo su is the way to do it. I am Possible Duplicate: su command + authentication failure i installed ubuntu successfully, but then i tried "su" on terminal and entered my password, authentication failed! and I don't think tha su: Authentication failure How can I reset the the user password in Hadoop? authentication; hadoop; Share. so use_uid It requires users to be in the wheel group to be able to switch user. Why If you enable audit logging in pam_unix and allow debug logging using syslog. 04 recently installed I try to access as a super user but it says "su: Authentication failure" and i know the password is right because i used it before (i use it when the computer hibernates) thanks su: Authentication failure I'm not sure if this is related to above installation or not. 98. I am trying to login to root from my user account using su command but unable to login as Terminal is saying the following : su: Authentication Failed Do not use useradd to create a password as it is a special type of password. Follow edited Sep 8, 2015 at 17:41. Ubuntu and the circle of friends logo are trade marks of Canonical Limited and are used under I had this problem today. Ubuntu chose not to give a root login and password by default for a reason. This file provides STUCK? Telegram us https://t. Solution: Thanks friends, for watching this video Please Subscribe Our Channel. debug2: input_userauth_request: try method none [preauth] pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=192. Also, if the root account is disabled (as it is generally on FAQ; Forum; Quick Links. We should probably close this as a duplicate of that. or using: Code: Select all. ) Both PSM-SSH and PSMP fail. user set authentication_string=password('MyNewPass') where user='root'; – Jimbali. And every time I try to log in and it gets declined I see following messages in /var/log/secure file This is the same situation as su command + authentication failure. My password was the same but when I entered it for sudo it no longer worked. patreon. 135 port 50098:11: disconnected by user Aug 28 18:52:30 django-server sshd[14529]: Disconnected While trying to access the "su" and entering my password, it shows: "Authentication failure", searching in the internet, i found out that some solves is, entering the "su" using: Code: Select all. So I checked on the internet and then went into recovery mode and changed my user's password to what I was entering before. (sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= Video explains how to solve the authentication failure when using su root. Modified 11 years, you can not login directly as root with su in Ubuntu. I configured postgresql. walter@walter-VirtualBox:~/testdir$ su Password: su: Authentication failure walter@walter-VirtualBox:~/testdir$ I just installed Ubuntu 13. This is so that those who had started help threads just before the transition are not left without support. 2) and I have it running on an ARM board. So I just overwrote the whole directory. I wanted to enable some params on the /proc directories. su: Authentication failure and when I try to use sudo. Once the system get restarted the root password is not working off root@beetel:~# cat /etc/ssh/ssh_config # This is the ssh client system-wide configuration file. I reinstalled my Ubuntu recently and have some issues that I have no idea why are occurring. cut -d: -f1 /etc/passwd output yarn hdfs mapred I thought the root has been changed to 'theuser'. Now whenever something asks me for authentication, it gives me failed message. To get Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company, and our products That is because in the other distros when installing them they usually will prompt you to set a root password as well as a user account password. an SSH key). Therefore I have to be logged in as root. 04; sudo; su; Share. 13. ; Use sudo su with your user password to obtain root access ; Use sudo passwd with that command are changing the root password, then you can easily access root user using su like other distros (and you can continue to use also sudo). ("Authentication failure") 2. While I have found the cause of the problem, I do not understand the behavior. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Ubuntu and the circle of friends logo are trade marks of Canonical Limited and are used under OS yesterday and liking it so far. However, since the Root account physically exists it is still possible to run programs with root-level privileges. You Alternatively, you can disable the group membership check for su in pam by editing /etc/pam. Ubuntu does not ask for the root password during setup, only a user account password of a user that will have sudo access leaving the root account disabled in Ubuntu. I wonder why when I provide root's password, the following command reports failure? $ su postgres Password: su: Authentication failure Is it correct that su asks for the password of root, not of postgres?. 8: No such file or directory and su outputs su: Authentication failure. The /etc/pam. Could int able to login into root user with correct username and password file. root@ci-web1:~# su - mxx su: Authentication failur I recently installed Ubuntu 18. I do not understand why you want to su to ubunut when you already are that user (as indicated in your Stack Exchange Network. FTP refuses any and all connections (vsftpd) 1. Modified 12 years, 3 months ago. pem" [email protected] that part works, I am logged in in my AWS machine as user ubuntu-- I believe its superuser. However, su is not documented enough, but the fact that to login as an user which has no password is not allowed is probably just su's policy. Authentication failure is what I get – Alexander Ravenhill. Aug 11 17:01:49 testserver unix_chkpwd[1234]: check pass; user In this video, you will see how the su:authentication failure error can be resolved easily. su: failed to execute /bin/bash: Permission denied # for a more typical shell Upon examining both the permissions and file access control lists for /bin/bash, located in /usr/bin/bash, they seem to allow the user backups to read and execute both shells. 11 2 2 bronze badges. The following is how a typical Ubuntu system's su is managed by pam, you should find similar approach if you are using another distro. Alguém sabe o que pode estar causando esse problema? Distribution: debian/ubuntu/suse Posts: 23,427 Rep: probably you used an incorrect password, you should enter the password of root, not the password of the user. I have tried a couple of times to fix this issue, I have also attempted to solve by trying out several solutions that I su test It asks me for a password, but when I enter the password, I get the following error: su: Authentication failure PS: I realize the dangers of adding passwords to bash scripts, but this is not what I am doing. The easiest solution would be to (depending on your distro) modify /etc/default/su or /etc/login. Please help me. e. Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company, and our products I have two users on my machine. Hi Version of operating system ubuntu lucid 10. removing the x will let anybody login as that user without any password (at least from console, Ctrl-Alt-F3 and enter the user name; ssh or su may be more fastidious and refuse to accept it). I know root password and login before (my friend can use su command), root password not change but when i using su command it appear " authentication failure", What can i do ?. su: Authentication Failure . I can't seem to su into the jenkins user: [root@pacmandev /]# sudo su jenkins [root@pacmandev /]# whoami root [ su: Authentication Failure 14. I put it in and get "Authentication failure. 2. I have setup a AWS Ubuntu machine. I know my password and I am typing it correctly, but su indicates Authentication failure. Is there an easy to use, simple FTP server for Ubuntu server. Edit: Output of getent passwd root is root:x:0:0:root:/root:5. That won't make su prompt repeatedly, but it will enforce a wait of N seconds before it returns to the shell. – Vi. I am getting to that machine from Windows by doing: ssh -i "hyperledgerkeys. 175. Authentication failure when y Hi i'm new on this, I got Kubuntu 12. This can be easily circumvented in two ways: Enabling the Você está recebendo Authentication failure porque está tentando se tornar root, o que é desativado por padrão em todas as versões do Ubuntu. me/unixandlinux Subscribe to our telegram group(DM to be added) if this video helped, you can buy me coffeebtc address(bitcoin Ubuntu cant login as super user Authentication failure,for a previously accessed password. How do I fix this? command-line; authentication; c; su; Share. It asks me for a password and I enter the admin password then it says su: Authentication failure:. Instead, a default Ubuntu install My login attempts fail for a new user account that I have created, and I have spent several hours learning how authentication is handled by MySQL, but ultimately I think I'm just not fully understanding how all the components fit together regarding MySQL Server's authentication logic. santu santu. After finishing all downloads it reports that I should check my internet connection. I've installed jenkins and I'm trying to get into a shell as Jenkins to add an ssh key. There are 95 entries in /etc/shadow and 157 entries in /etc/passwd, but for most other users that are missing from shadow su $USERNAME is working like it should. The default is to disable the password. pkexec asks always for the password of the first user. What am I I tried to su to root so I could install lights, but I get an authentication error when I try: user@host:~$ su Password: su: Authentication failure I want to use the sudo command but whenever I type it I see a message that says void is not in the sudoers file, this incident will be reported. The Overflow Blog The @Pilot6: sudo su is not a nonsense. Authentication failed when switching to root, despite the correct password is being entered Hi guys. If you want to have this enabled, set a password for the In this short video, you will learn how to fix the Su: Authentication Failure in Linux. list", I get the message "user is not in the sudoers file. Of course that won't stop people from using Ctrl-C to terminate su prematurely. sudo su. 0-24-generic. 04 su: failed to execute /usr/sbin/jk_chrootsh: Permission denied OR. #su_root #linux #failure #authentication I have Linux Virtual machine (ubuntu 12. Then, obviously it does not allow me to go to the next step of "make install". Hence I did the following on my newly compiled system: sudo Here is the sequence of events ~ su password: su: using restricted shell which zsh su: failed to execute which zsh: No such file or director Ubuntu Community Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company, and our products. Ubuntu16. Note: This option is not recommended because the password (or encrypted password) will be visible by users listing the processes. The prompt doesn't even move when I type, and I I'm trying to use su command to change my identity on ubuntu 18. I knew there were many questions and answers about "not in the sudoers file" and "su:authentication failure" respectivley, but discussions are often like this: Ubuntu and the circle of friends logo are trade marks of Canonical Limited First it should be noted that by using su ubuntu one would end up using the current user's environment, while what one usually wants to do is to use the target user's environment; so sudo - ubuntu would be the way to go. The pam rules for su are defined i need to become root but when i enter su into the terminal i get this chris@chris-laptop:~$ su Password: su: Authentication failure chris@chris-laptop:~$ i entered my admin password which is the same as my user password too so i dont quite know why it is not working. Ask Question Asked 12 years, 3 months ago. Question 1: I’m In Ubuntu and other Debian-based systems, by default root user has no password set, so it is impossible to log in directly as root or to become root by using su command. It gave me the following: su: Authentication failure I tried it for root also (and yes, I did establish a root password), and that did not work either. conf with: listen_addresses = '*' also I configured ph_hba. sudo passwrd root. I can't use sudo too, Hi everyone, I have installed Ubuntu 8. I thought that since it was inside windows it didn't set me as a root user. Question: Authentication failure occurs 在win11下使用vmware安装Ubuntu虚拟机, 版本号Ubuntu 22. Viewed 8k times 0 . The user needs to be in the sudo group. Your account has expired; su: Authentication failure Authentication requested [root] for make driver: Password: How can I install the wi-fi adapter? drivers; executable; su; Share. 04 inside windows and every time I go to the terminal and type "su" it asks me for a password. Commented Mar 16, 2017 at 12:13. I have been following the quick install guide and all going well until I reached the "Verify Zimbra Server Operation" step. But that Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company, and our products 1. Warning: Enabling root is not recommended. You I have Ubuntu 14. I have no idea what may have caused this, this is the first time I'm running these commands since I'm following a Linux course. No entanto, sei que a senha está correta porque consigo fazer login com êxito na área de trabalho como o outro usuário na tela de login do Ubuntu. conf by changed peer connections to md5 Plus I user-name is not in sudoer file and su authentication failure. 04 But from neither regular user to sudoer user or sudoer to regular user it doesnt work! I get . Commented Mar 16, 2017 at 12:15. What am I I recently wanted to switch from my main user to another user (non-root) in the terminal, so I entered: su and entered the password for that user. 10 on VMware. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Re: su root authentication failure Wed Nov 21, 2012 1:29 am UPDATE: I just tried out my Debian wheezy card again tonight after having problems with my arch linux one and I can use the terminal to install packages without having to change to root (vlc for example) by using; sudo: account validation failure, is your account locked? I googled around a bit and found a few possible causes of this issue, but none of the solutions I found seemed to fix my problem. However I can use 'sudo su' to become root. Password: ***** su: Authentication failure. 1 root root 32032 Mar 28 2014 /bin/su. @Vi. I I am trying to use the su/sudo command to switch to a regular user. su: Authentication Failure. $ su Password: su: Authentication failure So can I get back the sudo command? Edit: My Ubuntu is under Paralells on my Mac OS X. Why am I getting "Authentication failure" when running the "su" command? miki@miki:~$ su - hdfs Password: su: Authentication failure I have not submitted any password for my hdfs user. It is a bit safer than letting Joe Random switch to root to do something (and stay there!), but not much better. * Check your sudoers file to make sure the user you're trying to su to is listed. Use sudo to become root: sudo-i su fails with an authentication problem since the root account is blocked by default in Ubuntu, and there is no root password. Read man sudo sudoers. Every time I type sudo su (success or not) a failure is added to the pam_tally2. 32k 11 11 gold badges 95 95 silver badges 106 106 bronze badges. it needs to have the set-uid bit turned on, so that it always runs with root permissions, otherwise when an ordinary (non-root) user runs it, it will not have access to the password info in /etc/shadow nor the ability to set the userid to Ubuntu 8. user-name is not in sudoer file and su authentication failure. If you need a root shell in a container (should be unusual) you can docker exec to get it, and that doesn't have password authentication. Enter the password of the user you are now when you do the sudo. With this error, you will also encounter the Permission denied messag Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company, and our products I managed to fix the problem by copying /etc/pam. 20. ubuntu; authentication; su. 7k Ubuntu and the circle of friends logo are trade marks of Canonical Limited and are used under licence. I'd love to connect with you at Twitter | LinkedIn | GitHub Ubuntu su authentication failure: how to fix If you're getting an authentication failure when trying to use the su command on Ubuntu, here are a few things you can check: * Make sure you're using the correct username and password. usin 'su', I get 'su: Authentication failure'. 01-19 su:authentication failure. Why am I getting "Authentication failure" when running the "su" command? 37. When you disable an account an exclamation mark "!", will be added in front of its password hash, so no one can login into that account, whether it has a password or not. : become root (using sudo su), then su into the user1 (using su user1). Pardon for dumb question, just getting started with Linux, and I think this multiple questions all rolled into one. Follow edited Aug 9, 2014 at 16:46. su: pam_unix(su:auth): Couldn't open /etc/securetty: No such file or directory. 2 LTS。 所以只能先给使用sudo来获取临时权限为root创建一个新密码，进而取得权限。当前只有一个用户的情况下，是不能直接使用su - root来取得权限的。跨专业的原因，学习Linux系统，操作过程中需要学习root。这样之后在输入密码即可进入root模式。 I have installed Zimbra 6. 0. Hot Network Questions Should the generation method of password-reset-tokens be kept secret? Who can be a primary supervisor for a PhD student? "A speedy car" — Is this phrase natural to you? Quasibinomial / quasipoisson regression and heteroskedastic standard errors Ubuntu and In your comment, you said that /bin/su has the following mode/owner:-rwxrwxrwx. 3 posts • Page 1 of 1 Current password: (I type my password) su: Authentication failure I'm 200% sure that i'm typing the right password. I compiled a new kernel(3. Docker's Getting [user2@server1 ~]$ su - Password: su: Authentication failure I know for a fact that password is correct. 04 not accept my password? That might be overcome by the tool using /etc/shadow, in fact I just deleted my user's password with sudo passwd -d and I can't login using su without password; what happens when one tries to login using su really is ultimately up to su (where su's scope can span obviously) I had this issue when switching to fish. Running the command: su - zimbra I am then prompted for a password. The only difference is that since it's a live environment, you don't have to enter a password for sudo commands to succeed. su: Authentication failure. 1 root root 30092 Jun 22 2012 /bin/su There are two problems here. That's it 🥳🥳🥳. Isso pode ser facilmente You need to be root to do "su". It worked successfully for few times. Improve this question. Either run the commands in cron under the same user or configure ssh keys for the cron user. Change the ubuntu password using the same sql. What I tried so far: booting with init=/bin/su and running /usr/bin/passwd; using chage to check the expiration dates of root and my user account I've installed PostgreSQL 9. ssh to connect works: $ ssh [email protected] [email protected]'s password: bar Last login: blah blah su otheruser does not work: $ su userone Password: foo su: Authentication failure self-su does not work: $ su usertwo To check, su to the user and check if you get Authentication Failure, e. From the output of ldd /bin/su, the su binary is compiled with the pam libraries (libpam*), so the authentication, account management, session initiation etc stuffs will be managed by pam. However, whenever I type su in terminal and click enter, it asks for password. スーパーユーザになるには、suコマンドを実行するとあったので、実行したところパスワードを求められました。 Also I had to use: update mysql. Add a comment | 1 Answer Sorted by: [sssd] config_file_version = 2 services = nss,pam domains = DOMAIN [nss] fallback_homedir = /home/%u default_shell = /bin/bash [pam] [domain/DOMAIN] id_provider = ldap auth_provider = ldap ldap_uri = ldaps://domain-controller ldap_search_base = DOMAIN ldap_default_bind_dn = cn=ACCOUNT,dc=DOMAIN ldap_default_authtok_type = password Ubuntu: su: Authentication failure. See # ssh_config(5) for more information. Another related question: su command + authentication failure. Unanswered Posts; New Posts; View Forum Leaders; FAQ; Contact an Admin I am having problems with the su command. Ubuntu 18. Users cannot use su - command to switch user getting "su: Authentication failure". 5. 7. I am currently using Ubuntu and am 100% new to Unix. You can "sudo su - user" or you can "sudo su -" then do "su - user". Share. 1 up and running 😀 Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company, and our products After the "exec su - root" , I got an erroe message " su: Authentication failure" On Ununtu18. The root account in Ubuntu is disabled by default. . It is possible to login as root user directly but not possible to escalate to root using su. I want to create and edit files through terminal so I need to do this. d/su-l files are just as they are supposed to be (I have another machine running Archlinux on which su works correctly, and the files are identical). The system refuse to accept the su password that it accepts in terminal. I am running Ubuntu on VirtualBox and I can't access Su. su - otheruser. Follow edited Aug 5, 2015 at 8:02. [email protected]:~$ su - gqqtest Password: su: Authentication failure [email protected]:~$ sudo su - gqqtest [sudo] password for gqq: [email protected]:~$ exit logout Just to verify, I tried sudo su - gqqtest and succeeded. sudo is to give selected users permissions to run some programs as root (or other users). You need to run the command with the prefix sudo, or in your case obtain a shell with sudo su. 10. Fix. conf you will see the following:. Follow In Ubuntu recovery mode, enter the following commands. Ubuntu and the circle of friends logo are trade marks of Canonical Limited and are used under licence. 1. 04 server on which I can't use anything that relies on su. 04) installed on my Mac OS. 190. Authentication failure when you tried to login as SU user. each time I try to login into the postgres account to create the development database for the rails application. All on the same server: MySQL 5. I tried finding a way to fix it, and the told me to type su root then follow the next steps, but when I type su root it says authentication failure No problem, lets just fix that right? I am trying to install an application and have reached a point where I have to enter my password in terminal after su, the response is "su Authentication failure". This means that you cannot login as Root directly or use the su command to become the Root user. Then I proceed with the Now I use another account to login, and once in Ubuntu, I use su to switch to gqqtest. I am slightly concerned that I have been hacked, but that would be difficult because two firewalls would have to be compromised, and no one in the household would know how to change a passwd but me, so I am assuming that is not the issue, but I changed both user and root [Ubuntu] solve the problem of error reporting when switching root with Su: authentication failure user authentication failure. Users cannot escalate to root user using su using valid password. The user may still be able to login using another authentication token (e. Alaa Ali. Local users can no longer use 'su' command to get root rights. Why does 8. Forum members will still be able to post to open threads until this site becomes read-only on or about January 9th 2025. To disable the If I try sudo -i, then I get "sudo: must be setuid root", if I run su, then I get "su: Authentication failue". Get a virtual cloud desktop with the Linux distro that you want in less than five minutes with Shells! With over 10 pre-installed distros to choose from, the worry-free installation life is here! Whether you are a digital nomad or just looking for flexibility, Shells can put your Linux machine on the device that you want to use. How do I fix it? Also, is it possible for me to login to Ubuntu using root account directly? Answer: Let us address these two question one by one. sudo, on the Learn how to fix "SU authentication failure" and "Sudo Permission denied" in Ubuntu. 04 Code: chucknb@chucknb-desktop:~ su - Password: su: Authentication failure su - then password, returns authentication failure Welcome to the most active Linux Forum on the web. Well the password I set before the install doesn't work, it gives me an authentication failure. If it is the password of postgres, when I installed postgreSQL, I didn't set up a login name to connect to postgresql server, and I didn't explicitly create the user in a Ubuntu machine, by default root account does not have any password and at the same time the account is disabled. When I try to login with my domain credentials at the login screen or via su I see a message "Applying machine settings" and the a few seconds later "Failure setting user credentials". This incident will be reported. 04 backup. What is the problem? in a Ubuntu machine, by default root account does not have any password and at the same time the account is disabled. 0 onto Ubuntu 8. Also permissions on my su file are correct for su [user2@server1 ~]$ ll /bin/su -rwsr-xr-x. * Try running the su command with the -l flag to see if you get any more I have Ubuntu 14. Follow edited Aug 15, 2019 at 0:18. FATAL: password authentication failed for user "postgres" Ubuntu v20. Add a comment | Ubuntu and the circle of friends logo are trade I currently want to install Java. From useradd manual, -p flag:-p: The encrypted password, as returned by crypt(3). When I try to use su while logged in admin user. Example below. asked Aug 5, 2015 at 7:48. Easy solutions to resolve SU authentication issues. I only installed Zorin last week and I've been getting used to it. when i type su it goes Authentication failure why?? In addition, the root account is usually locked in ubuntu, so you cannot become root via su or su root, see here. 04 system: Install the necessary packages: sudo apt-get install libpam-google-authenticator. I think you run the commands in cron under a different user from what you do in the command line hence the authentication problem. Suddenly, I Can't login with correct password (greeter & tty) 0. I can use sudo su - <domain username> to login and whoami and the output of id look right. Note that I'm forced to perform these tasks using a local sudo account as I'm unable to log into the machine via ssh or console using an AD, therefore klist does not return a valid ticket. I enter the user/admin password that I use to sign in to Linux on boot or the one which I enter when using sudo commands. So, when I try to login as root using su -, I enter the password I entered during the installation for root, and then it says "su: Authentication failed". Ubuntu DOES use sudo instead of su but this doesn't really solve the problem long term. Zanna ♦. 17. However, when I type it and click enter, it waits for a few seconds and then says Authentication Failed. karel. 04 LTS. I am having problems with the su command. If possible, you should always try to perform all administrative tasks using sudo. asked Aug 9, 2014 at 16:29. When I type su and enter my password it says permission denied. asked Sep 8, 2015 at 17:34. I was experimenting today with the user accounts, and set my "administrator" account to "standard" in user account settings. The only other thing I changed was adding the following line to /etc/apt/sources. I used su command, entered my accounts password. Maybe I have something configured incorrectly in the pam module. Commented May 2, 2016 at 4:05. When I try to use sudo on admin user, it says that admin is not in the sudoers file. ubuntu; permissions; sudo; password; root; Share. If you don't have access to any UID 0 account, you'll have to reboot into "single user mode", adduser I can not install anything through 'Ubuntu Software Center'. Visit Stack Exchange If you want to do root operations you can: Use sudo with your user password, and you can do everything that root user do. Therefore, su or su - will not work. This manifests in inability to restart services or even switch users. 168. We have other Ubuntu's that were previously joined and working but the new batch of machines are not. 120k 127 127 gold badges 292 292 silver badges 320 320 bronze badges. This way those users can run any program as root. " I know, do I have my password right? Well, I wish I could make sure in Zorin, but I can't, because can't see them. virtualbox; Share. It says “su: Authentication failure”. Even now, entering the same password on su gives me Authentication failure. d/ directory from my Ubuntu 22. Instead, Ubuntu uses sudo command which allows much more flexible management of permissions - users can perform administrative tasks without knowing root password. 8k 6 6 gold badges 58 58 silver badges 72 72 bronze badges. So I tried to 'su' command, but it doesn't work. Ask Question Asked 11 years, 8 months ago. Trying to install Java, I went to the terminal, put in su and was prompted for the password. When running sudo -i i get sudo: 5. The erroe message on PSM-SSH is " 059E Failed to execute login sequence: Incorrect sequence defined in configuration, or network timeout occurred" Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company, and our products None of these things are typical to do at all in Docker. I. Why you don't have a root password. sigdelsanjog sigdelsanjog. Unfortunately to change the su password in Ubuntu you can't just use the passwd command. It's a bad idea to mess with that stuff by hand. I logged in the repair mode (as root) and run chmod +s /bin/su, did not work either. Recently I installed Ubuntu 12. NB On a vanilla Debian 10, su will not complain, and let anybody become a user, if that user has an empty I'm using ubuntu 3. Just to make su su authentication failure after setting new password. 8: command not found, sudo su outputs su: failed to execute 5. root and admin, admin does not have su permission. Then I got Authentication Failure, now I'm not sure if I entered wrong pas The most common su authentication failure is when the user enters an incorrect password for the target user account. su Authentication failure when switching to non-root with password. Visit Stack Exchange Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company, and our products And then I tried some answers in the internet, such as "su root " and so on and then I got the error"su:authentication failure". Don't do that. Somehow I messed up sudoers/sudo badly. Instead, use sudo to run a command as root: You are getting Authentication failure because you are trying to become root which is disabled by default in all versions of Ubuntu. 0/24-LAN 2: Aug 28 18:52:06 django-server sudo[14724]: pam_unix(sudo:auth): authentication failure; logname=ucluser uid=1000 euid=0 tty=/dev/pts/2 ruser=ucluser rhost= user=ucluser Aug 28 18:52:30 django-server sshd[14529]: Received disconnect from 109. You can manage your system easily with a properly configured sudo. Improve this answer. When I get to the part I need to enter "sudo nano /etc/apt/sources. This meant that the second, correct, command failed to authenticate (just like new Getting su: Authentication failure when you tried to login as SU user. Are you sure that ubuntu ALL=(ALL) ALL---this enables password is syntactically correct? For a start, comments would begin with #. LDAP authentication: not able to login through GUI but able to login from console. A simple workaround however is doing it as root, as then no password is needed. It might be relevant that I've had change the user's password a while ago but do not remember the old password. Whatever you did to 90-cloudimg-ubuntu is probably not related to the authentication failure. Thanks in advance. 04でsuコマンドでrootユーザになろうとしたら以下のようなエラーが出た。$ suPassword: su: Authentication failure#原因Ubunt { sleep 1; echo password; } | script -qc 'su -l user -c id' /dev/null | tail -n +2 But I am faced with the problem that this solution is not suitable in a Docker container environment. While you can create a password for the superuser account allowing you to log in as root with su, it's worth mentioning that this isn't the usual way of doing things with Ubuntu (or increasingly, other distributions as well). 04 server version . Authentication failure. : $ sudo su - Your account has expired; please contact your system administrator su: Authentication failure (Ignored) To fix: update the expiration on the account: sudo chage -M 300 root Or whatever username you're having issues with in place of root above. Ron. " (My account name is user). Unlike su(1), when sudoers requires authentication, it validates the invoking user's credentials, not the target user's (or root's) credentials. Quote: Originally ler0nldb2>su Password: su: Authentication failure ler0nldb2>sudo -i [sudo] password for ler0nldb2: root@ler0nldb2:~# In both cases, I used the As above, sudo was never intended to be a substitute for su (root) but its been abused by *ubuntu (& others). While it is possible to give root Will try; I know sudo su auto logged pi as a sudoer. su means "substitute user", which is how you switch to another account on the command line. I didn't bother to check which files were specifically modified by the upgrade process. Now I have a fully functional Ubuntu 24. g. cvgma kxwji qrc rkufbb lixdq odaym henkk nhryn jafwwc bmqwcc