#Man sudo password#

Sudo will now have to wait 10 minutes before prompting for a password again. To change timeout for a user, we write, Defaults:john time_stamp=10 We can change this by editing the sudoers file as follows, sudo visudoĬhanging the default timeout, Defaults timestamp_timeout=10 To allow john to execute sudo command without a password prompt by editing the file as follows, john ALL=(ALL) NOPASSWD: ALLĪfter entering the password when sudo is invoked, by default the timeout is set to 5 minutes before any other sudo user command requires a password again. To allow a user john to only execute chmod command as sudo, we edit the file as follows, sudo visudo We can also limit the programs a user can execute as sudo by editing this file. To add a user to this group we write, usermod -aG sudo username Members of the sudo group which is defined in the sudoers file have administrative rights and are able to execute any command as the root user. -p, -preserve-environment, for preserving the current shell environment.-s, -shell SHELL, to specify a different shell.-l, -login USERNAME, to run a login script so as to change to a specific user.-c, -command COMMAND, to run a specific command as a specified user.

The syntax for su command is as follows, su ] When the above command is executed sudo check the sudoers file to check whether the user invoking the command has rights.

The basic form without any options is as follows, sudo command The syntax for the sudo command is as follows, sudo COMMAND Sudo grants a one time access where while su grants unlimited access. With it we can switch accounts without logging off from the current session. Su command allows a user to execute commands with another user's privileges. Sudo command allows a user with proper permissions to execute commands as root user with administrative privileges. In this article we discuss both the sudo and su commands in Linux both of which deal with assigning privileges to user so that they can execute certain commands.

Man sudo