How to run a command without using sudo password in ubuntu?
Today I have tried my client PC run shutdown and reboot command without being enter sudo password. The details given below
Use the command “sudo visudo” to edit the file. Now look for the line “# User alias specification” and add a list of users as follows:#
User alias specificationUser_Alias USERS = user1, user2, user3
Now look for the line “# Cmnd alias specification” and add a command list as follows:
# Cmnd alias specificationCmnd_Alias SHUTDOWN_CMDS = /sbin/shutdown, /sbin/reboot, /sbin/halt
Now look for the line “%admin ALL=(ALL) ALL” and add the command which will let USERS give SHUTDOWN_CMDS without a password
:%admin ALL=(ALL) ALLUSERS ALL=(ALL) NOPASSWD: SHUTDOWN_CMDS
Now those specified users can use the commands “sudo shutdown”, “sudo halt”, and “sudo reboot” without being asked for your password.
EDIT: By the way, the reason that these commands can’t be used by normal users is that Linux was designed as a multi-user system. You don’t want one user shutting down the system while others are using it!