Centos passwordless sudo11/22/2023 ![]() The user needs to provide password before but after making changes the user can restart the apache service with sudo without entering the password. See the below screenshot before and after enabling the password-less sudo privileges for an account. The command syntax will be like: sudo your_command_here ![]() Update entry for your user account with NOPASSWD: option as showing below:Ĭhange username with your user account and save file.Īll done, to test run any superuser command with sudo.Edit sudoers file using visudo command or use below command.After completing this tutorial, you can run super user commands (allowed) without entering a password. In this tutorial, you will understand how to configure passwordless sudo account on a Linux machine. Most Linux distributions like Ubuntu, Debian, Fedora use the sudo mechanism to allow admin users to run commands with root privileges. Then you can assign sudo privileges to that account. Abhishek Prakash Learn how to run some or all sudo commands without entering the password on Ubuntu or any other Linux distribution. None other than the root user can reboot a Linux system but you want to provide the privilege to your team member, so they can reboot the instance on the absence of you. doesnt seem to work on centos 7, mount: only root can use '-options' option MetaStack. ![]() So, I need to have the users be able to run mount. For example, a command to reboot the server. Unfortunately, even when the plasma-vault is open, the moment they use sudo to run mount, the sudo process runs as root, who can not see the contents of the vault. ![]() Some of the commands are accessible by the root user only. $ man pam.Sudo provides special privileges to any user or group. That’s all for now! For more information, see the PAM manual entry page ( man pam.conf) and that of sudo command as well ( man sudo). Now try to su to the account postgres as the user aaronk, the shell should not prompt you to enter a password: $ sudo su - postgres The residual problem with disabling 'su' by removing it or removing permission bits is that some system scripts may depend on su being present. Remove its setuid permission bit ( chmod u-s /bin/su ). Then add the following configuration below the line “%sudo ALL=(ALL:ALL) ALL” as shown in the following screenshot. Remove its execute permission bits ( chmod o-x /bin/su or chmod go-x /bin/su ). In this case, the user (for example aaronk) who will switch to another user account (for example postgres) should be in the sudoers file or in the sudo group to be able to invoke the sudo command. You can also su to another user without requiring a password by making some changes in the sudoers file. Now try to su to the postgres account as the user aaronk, you should not be prompted for a password as shown in the following screenshot: $ su - postgres Next, add the user (for example aaronk) that you want to su to the account postgres without a password to the group postgres using usermod command. auth sufficient pam_succeed_if.so use_uid user ingroup postgresĬonfigure PAM to Allow Running Su Command without Password Otherwise, the normal authentication steps are executed. The line that follows checks if the current user is in the group postgres, if yes, the authentication process is considered successful and returns sufficient as a result. In the above configuration, the first line checks if the target user is postgres, if it is, the service checks the current user, otherwise, the default=1 line is skipped and the normal authentication steps are executed. auth pam_succeed_if.so user = postgresĪuth sufficient pam_succeed_if.so use_uid user ingroup postgres # vim /etc/pam.d/suĪdd the following configurations after “auth sufficient pam_rootok.so” as shown in the following screenshot. To allow users in a specific group to switch to another user account without a password, we can modify the default PAM settings for the su command in the /etc/pam.d/su file. PAM ( Pluggable authentication modules) are at the core of user authentication on modern Linux operating systems. You can use any of the two solutions provided below to solve the above issue. WIth sudo -s you may not get the extra system path for root. With your setup, you could do something like sudo su and it wont ask for a password. Any other user will be prompted to enter the password of the user account they are switching to (or if they are using the sudo command, they will be prompted to enter their password), if they don’t provide the correct password, they get an “ authentication failed” error as shown in the following screenshot. sudo and su are two different commands, and do different things. For example, we have a user account called postgres (the default PostgreSQL superuser system account), we want every user (typically our PostgreSQL database and system administrators) in the group called postgres to switch to the postgres account using the su command without entering a password.īy default, only the root user can switch to another user account without entering a password. In this guide, we will show how to switch to another or a specific user account without requiring a password.
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