By Joshua Erdman
Digital Foundation, inc.
Here's a list of killer commands on a typical Linux installation. Keep in mind that there are
some flavors of Linux that may not support the commands listed here.
Used to insert user information (also known as finger info) for a user account.
Display or change run level settings for all services listed in /etc/rc.d.
File security modifier to change file and directory CONTEXT permissions - NEW!.
File security modifier to change permissions.
File security modifier to change owner.
Generates a report on the freespace for each partition.
Compares and displays the DIFFerence between two files. Similar to the
comp utility in Windows.
DNS Name Resolution Utility
Helpful search tool
Text filtering Utility.
Switched from one run level to another.
See - more
Utility used to display text output one screen at a time. Ex. more /etc/motd
RedHat Package Manager - This tool allows you to install software packages that are already compiled. This makes software
installation easier and even faster. Unfortunately the latest version is not always available.
Used to start, stop, restart, or reload
any installed service. EX. service sendmail stop
Used to get Super User rights (root) also great for logging in as another user if you append --login <username>.
Tape ARchive - File backup program. Use man tar to get more info.
Resource usage analyzer. Will Display RAM, CPU, and total time usage.
Used to update Linux Packages to plug securitye vulnerabilities.
Used to create a new user account.
Used to delete a user account.
Very flexible but cryptic text editor.
Web Get - This is a great utility to download any file available on the Internet.
Similar functionality to RPM (see above)
however will automatically resolve dependencies.
Article last reviewed: 12/13/2006
Created by: Digital Foundation,
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