Revision as of 05:38, January 25, 2015 by Threesixes (Talk | contribs) (a bit better, needs individual commands saving what i've got so far)

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Source Repository:Repository:Gentoo Portage Tree

Summary: Allows users or groups to run commands as other users

Use Flags

Allow sudo to send emails with sendmail.
Let sudo print insults when the user types the wrong password.



Important Updates

Improtant Updates
2016-05-05 by Oleg

PHP and Kernel Updates

PHP and Kernel Updates
2016-04-01 by Oleg

OpenSSL Update

OpenSSL Update
2016-03-04 by Oleg



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sudo allows privilege escalation for non root users to perform restricted actions while in a locked down user environment.


# emerge sudo



Instead of editing /etc/sudoers, you may drop individual configuration files into the /etc/sudoers.d/ directory

Passwordless Sudoer

The sudo configuration file is located @ /etc/sudoers. When editing this file be very careful to not introduce syntax errors. Several other linux distributions use visudo to edit /etc/sudoers.

$ su -c 'nano /etc/sudoers'

/etc/sudoers - uncomment wheel group no password sudo

Add your user to the wheel group to enable sudo:

$ su -c 'gpasswd -a $USER wheel'
Either log out, and in again or restart:

$ su -c 'shutdown -r now'

Disabling Root Access By Password

To better secure a system, one may desire to disable root logins by password.

$ sudo passwd -ld root
to access root:

$ sudo su
Root can also be accessed by logging in via ssh keys, or as a restricted user then sudo su as above.

Bash Completion

Users that want bash completion with sudo need to run this once.

$ echo "complete -cf sudo" >> $HOME/.bashrc

Passing Environment Variables

To pass environment variables to the temporary root use the -E flag.

$ sudo -E echo 'hello world'

Passing Aliases

If your user has aliases you wish to use under sudo you must alias sudo with a space first:

$ echo "alias sudo='sudo '" >> $HOME/.bashrc