Sudo: List available commands

Written by Benjamin Cane on 2011-08-17

Sudo is the Unix/Linux standard for providing users with the ability to run commands as another user. However when working with large teams sometimes its difficult to identify which user has what access, below is a command that makes it easy to see what is available for a user.

Example:

[[email protected] ~]$ sudo -l  

User sudoguy may run the following commands on this host:  
 (root) /bin/nice, /bin/kill, /usr/bin/kill, /usr/bin/killall, (root) /sbin/route, /sbin/ifconfig, /bin/ping, /sbin/dhclient, /usr/bin/net, /sbin/iptables, /usr/bin/rfcomm, /usr/bin/wvdial, /sbin/iwconfig, /sbin/mii-tool, (root)  
 /bin/rpm, /usr/bin/up2date, /usr/bin/yum, (root) NOPASSWD: ALL

The cool thing about this is you can also do this as root without switching to the user.

[[email protected] ~]# sudo -lU sudoguy  

User sudoguy may run the following commands on this host:  
 (ALL) NOPASSWD: ALL  
 (root) /bin/nice, /bin/kill, /usr/bin/kill, /usr/bin/killall, (root) /sbin/route, /sbin/ifconfig, /bin/ping, /sbin/dhclient, /usr/bin/net, /sbin/iptables, /usr/bin/rfcomm, /usr/bin/wvdial, /sbin/iwconfig, /sbin/mii-tool, (root)  
 /bin/rpm, /usr/bin/up2date, /usr/bin/yum, (root) NOPASSWD: ALL  

Picture of Benjamin Cane

Benjamin's specialty is keeping the lights on for mission critical systems. He is currently building applications that enable high concurrency financial transactions.

Recently Benjamin published his first book; Red Hat Enterprise Linux Troubleshooting Guide. In addition to writing, he has several Open Source projects focused on making Ops easier. These projects include Automatron, a project enabling auto-healing infrastructure for the masses.


Publications

Identify, capture and resolve common issues faced by Red Hat Enterprise Linux administrators using best practices and advanced troubleshooting techniques

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Excellent, excellent resource for practical guidance on how to troubleshoot a wide variety of problems on Red Hat Linux. I particularly enjoyed how the author made sure to provide solid background and practical examples. I have a lot of experience on Red Hat but still came away with some great practical tools to add to my toolkit. - Amazon Review