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Compress excutable files in place.
The gzexe utility allows you to compress executables in place and have them automatically uncompress and execute when you run them. FYI: You can compress any executable sha-bang scripts as well (py, pl, sh, tcl, etc.).

Periodic Log Deletion
deletes logs not modified in over [#] days - modify to compress or move, as needed

Monitor memory without top or htop
It repeats a command, such as free, every five seconds and highlights the differences

Using Git, stage all manually deleted files.
You'll probably want to pass in the -rf options if you have to delete a directory or something.

change directory to actual path instead of symlink path
If you use symlinks a lot, especially nested symlinks, this puts you back on the absolute path to command-line-fu-nirvana. (Note the backticks around pwd).

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

The BOFH Excuse Server

run command on a group of nodes in parallel redirecting outputs
Do the same as pssh, just in shell syntax. Put your hosts in hostlist, one per line. Command outputs are gathered in output and error directories.

Sync the date of one server to that of another.
(Useful when firewalls prevent you from using NTP.)

Show memory usage of all docker / lxc containers


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