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Compare an archive with filesystem
and you quickly know the files you changed

list block devices
Shows all block devices in a tree with descruptions of what they are.

Copy specific files to another machine, keeping the file hierarchy
Notes: * Adjust the find command to your own filters. * The -P flag forces to keep absolute paths in the tarball, so that you can be sure that the exact same file hierarchy will be created on the second machine.

Print text string vertically, one character per line.

See KeepAlive counters on tcp connections
See connection's tcp timers

Delete files older than..
This command will delete files i a given path (/dir_name) , which older than given time in days (-mtime +5 will delete files older than five days.

Rename all files in lower case

Create backup copy of file, adding suffix of the date of the file modification (NOT today's date)

Shows picture exif GPS info if any and converts coords to a decimal degree number
This oneliner uses Imagemagic's identify utility to show the exif GPS information of an image an also converts Grad/MIn/Sec representation to a decimal degree number

A signal trap that logs when your script was killed and what other processes were running at that time
trap is the bash builtin that allows you to execute commands when the current script receives a particular signal. Uses $0 for the script name, $$ for the script PID, tee to output to STDOUT as well as a log file and ps to log other running processes.


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