visudo checks the file syntax before actually overwriting the sudoers file. If you use a plain editor, mess up the syntax, and save... sudo will (probably) stop working, and, since /etc/sudoers is only modifiable by root, you're stuck (unless you have another way of gaining root). Additionally it ensures that the edits will be one atomic operation. This locking is important if you need to ...

Mar 15, 2013 · Why it is recommended to edit /etc/sudoers file with the visudo command? Here is a sample of the file: ## Sudoers allows particular users to run various commands as ## the root user, without needi...

Feb 2, 2023 · Try specifying the full path for the visudo command, i.e. sudo /usr/sbin/visudo. If that works, then probably the PATH environment variable for the command launched by sudo doesn't currently include /sbin and/or /usr/sbin for some reason. Since Ubuntu is designed for extensive use of sudo, that would be somewhat unexpected; perhaps some earlier customization by you is affecting root's PATH ...

Fedora 14 uses vi by default when one runs visudo. Is there a way to change this to something else?

Jul 6, 2017 · I get the following error when running sudo visudo on my Ubuntu: visudo: /etc/sudoers busy ,try again later

Always use visudo to edit that file. To choose the editor that visudo runs, set the VISUAL environment variable (or EDITOR, as long as VISUAL is unset). On a multiuser machine, using visudo has the additional advantage that it takes care of locking in case two administrators edit the file at the same time.

Feb 10, 2019 · visudo is a command provided for editing the sudoers file in a safe way. To quote its manual page: visudo edits the sudoers file in a safe fashion, analogous to vipw (8). visudo locks the sudoers file against multiple simultaneous edits, provides basic sanity checks, and checks for parse errors. The /etc/sudoers.tmp file is lock file used by ...

Feb 14, 2015 · If there are multiple matching entries in /etc/sudoers, sudo uses the last one. Therefore, if you can execute any command with a password prompt, and you want to be able to execute a particular command without a password prompt, you need the exception last. myusername ALL = (ALL) ALL myusername ALL = (root) NOPASSWD: /path/to/my/program Note the use of (root), to allow the program to be run as ...

Jul 27, 2017 · sudo visudo is to modify the default configuration file directly, but in the file has suggestion below Please consider adding local content in /etc/sudoers.d/ instead of directly modifying this file. So, better way is cd /etc/sudoers.d sudo visudo -f user_name Add the content Defaults timestamp_timeout=(number) (number) is the new timeout in ...

May 28, 2021 · There were no other lines but the problem since to have gone away after adding a newline character at the end of the line above