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Detect illegal access to kernel space, potentially useful for Meltdown detection
Based on capsule8 agent examples, not rigorously tested

Google's Text-To-Speech in command line
Improved google text-to-speech function. Allows to specify language, plays sound in terminal. Automatically removes downloaded file after successfully processing. Usage: $ say LANGUAGE TEXT Examples: $ say en "This is a test." $ say pl "To jest test"

show installed but unused linux headers, image, or modules
will show: installed linux headers, image, or modules: /^ii/!d avoiding current kernel: /'"$(uname -r | sed "s/\(.*\)-\([^0-9]\+\)/\1/")"'/d only application names: s/^[^ ]* [^ ]* \([^ ]*\).*/\1/ avoiding stuff without a version number: /[0-9]/!d

Tail a log and replace according to a sed pattern
Tails a log and replaces it line-by-line according to whatever you want to replace. Useful if the file writing to the log can't be modified, so you need to modify its output instead.

Watch several log files in a single window
It works like a "tail -f" on several files. Use the number keys 0-9 to set a baseline in the numbered window. Pressing "b" let you scroll back in one of the windows.

rgrep: recursive grep without .svn
Only excludes .svn from filenames.

a simple bash one-liner to create php file and call php function

convert single digit to double digits
works only in zsh, requires autoload zmv

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"

Calculate pi to an arbitrary number of decimal places


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