Redhat linux commands

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.

chfn
Used to insert user information (also known as finger info) for a user account.
chkconfig
Display or change run level settings for all services listed in /etc/rc.d.
chcon
File security modifier to change file and directory CONTEXT permissions - NEW!.
chmod
File security modifier to change permissions.
chown
File security modifier to change owner.
cron
Scheduling Utility
df
Generates a report on the freespace for each partition.
diff
Compares and displays the DIFFerence between two files. Similar to the comp utility in Windows.
dig
DNS Name Resolution Utility
find
Helpful search tool
grep
Text filtering Utility.
init
Switched from one run level to another.
less
See - more
more
Utility used to display text output one screen at a time. Ex. more /etc/motd
rpm
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.
service
Used to start, stop, restart, or reload any installed service. EX. service sendmail stop
su
Used to get Super User rights (root) also great for logging in as another user if you append --login .
tar
Tape ARchive - File backup program. Use man tar to get more info.
top
Resource usage analyzer. Will Display RAM, CPU, and total time usage.
up2date
Used to update Linux Packages to plug securitye vulnerabilities.
useradd
Used to create a new user account.
userdel
Used to delete a user account.
vi
Very flexible but cryptic text editor.
wget
Web Get - This is a great utility to download any file available on the Internet.
yum
Similar functionality to RPM (see above) however will automatically resolve dependencies.

Posted in: LinuxServer