Common SSH Commands - Linux Shell Commands
We've put together some of the more frequently used SSH commands or linux shell commands, and organized them by name so you can easily find a command, their description and how to use it. This guide will continue to be updated and should not be considered a complete list of SSH commands or linux shell commands, but commands, we found, often used. If you would like to add to this guide, please email us and let us know.
Common SSH Commands or Linux Shell Commands,
cd : change directory · · cd /usr/local/apache : go to /usr/local/apache/ directory
cat filename.txt : cat the contents of filename.txt to your screen
tail : like cat, but only reads the end of the file
more : like cat, but opens the file one screen at a time rather than all at once
pico : friendly, easy to use file editor
vi : another editor, tons of features, harder to use at first than pico
grep : looks for patterns in files
touch : create an empty file
ln : create's "links" between files and directories
rm : delete a file
last : shows who logged in and when
w : shows who is currently logged in and where they are logged in from.
netstat : shows all current network connections.
top : shows live system processes in a nice table, memory information, uptime and other useful info. This is excellent for managing your system processes, resources and ensure everything is working fine and your server isn't bogged down.
ps: ps is short for process status, which is similar to the top command. It's used to show currently running processes and their PID.
file : attempts to guess what type of file a file is by looking at it's content.
du : shows disk usage.
wc : word count
cp : copy a file
kill: terminate a system process
10574 pts/4 0:02 /bin/csh
10590 pts/4 0:09 APP
Each line represents one process, with a process being loosely defined as a running instance of a program. The column headed PID (process ID) shows the assigned process numbers of the processes. The heading COMMAND shows the location of the executed process.
Putting commands together
grep User /usr/local/apache/conf/httpd.conf |more
last -a > /root/lastlogins.tmp
tail -10000 /var/log/exim_mainlog |grep domain.com |more
netstat -an |grep :80 |wc -l
mysqladmin processlist |wc -l
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