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

Doing some floating point calculations with rounding (e.g. at the 3rd decimal)

Find recursively, from current directory down, files and directories whose names contain single or multiple whitespaces and replace each such occurrence with a single underscore.
Note the g for global in the perl expression; without it, only the first occurrence in the name would be replaced.

See your current RAM frequency

Display all shell functions set in the current shell environment
Uses the shell builtin `declare` with the '-f' flag to output only functions to grep out only the function names. You can use it as an alias or function like so: alias shfunctions="builtin declare -f | command grep --color=never -E '^[a-zA-Z_]+\ \(\)'" shfunctions () { builtin declare -f | command grep --color=never -E '^[a-zA-Z_]+\ \(\)'; }

lsof - cleaned up for just open listening ports, the process, and the owner of the process
another formatting/oneliner for lsof User - Process - Port

Find all Mac Address
Is the better option on a Open SuSE Box

Find the dates your debian/ubuntu packages were installed.
Find when debian packages were installed on a system.

skip broken piece of a loop but not exit the loop entirely
useful for loops like for i in $(cat list_of_servers); do ssh -q $i hostname; done if there is an unreachable server, you can just press ctrl + \ to skip that server and continue on with the loop

Convert CSV to JSON
Replace 'csv_file.csv' with your filename.


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