Linux Cheat Sheet
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"screen" can manage long-lived sessions via SSH
One-liner to remove an incorrect entry in the SSH known_hosts file
Verifying Which Ports Are Listening
Simplifying Your Life With an SSH Config File
18 Tar Command Examples in Linux
A collection of Unix/Linux find command examples
How To Set Up and Use Yum Repositories on a CentOS 6 VPS
Installing/Updating NTP Service on CentOS
Linux Performance Analysis in 60,000 Milliseconds
Secure Copy
scp sourceFile destinationFile where the "files" use the following convention if they are remote; user@host:file
example of copying a remote file to the current (local) directory; scp hdpdemo@hdp-demo-data9.cloudapp.net:/usr/hdp/current/hadoop-client/hadoop-common.jar .
Services
Stop/Start/Restart services; see example for MySQL at http://theos.in/desktop-linux/tip-that-matters/how-do-i-restart-mysql-server/
Good help with failures for MySQL start up at http://stackoverflow.com/questions/20407292/centos-another-mysql-daemon-already-running-with-the-same-unix-socket
Removing a string from the front of all files names (ex: maybe you have Photo_9999.jpg looking file names) in current directory
rename "Photo_" "" *