Commands tagged ssh (188)

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Create backup copy of file, adding suffix of the date of the file modification (NOT today's date)
When I go to change a configuration file I always like to make a backup first. You can use "cp -p" to preserve the modification time, but it gets confusing to have file.prev, file.prev2, etc. So I like to add a YYMMDD suffix that shows when the file was last changed. "stat -c %Y" gives you the modification time in epoch seconds, then "date -d @" converts that to whatever format you specify in your "+format" string.

Push your present working directory to a stack that you can pop later
If are a Bash user and you are in a directory and need to go else where for a while but don't want to lose where you were, use pushd instead of cd. cd /home/complicated/path/.I/dont/want/to/forget pushd /tmp cd thing/in/tmp popd (returns you to /home/complicated/path/.I/dont/want/to/forget)

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

set your screensaver as your desktop background MAC OSX

Find common groups between two users

Delete recursively only empty folders on present dir

dmesg with colored human-readable dates
Use sed to color the output of a human-readable dmesg output

Change/Modify timestamp

find and reduce 8x parallel the size of PNG images without loosing quality via optipng

Nicely display mem usage with ps
Nicely display mem usage with ps.


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