Commands by kbaegis (2)

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guitar synthesizer in one line of C
outputs a f=220Hz guitar string sound (fifth string A) needs ALSA

Backup of a partition
Clone a partion with tar.

Number of CPU's in a system
/proc/cpuinfo contains information about the CPU. Search for "processor" in the /proc/cpuinfo file wc -l, counts the number of lines.

Go up multiple levels of directories quickly and easily.

Convert CSV to JSON with miller
Using the csv tool `miller` you can transform a csv file into a json array of objects, where the properties are the values of the csv header line and the values are the values of the subsequent lines.

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

Apache memory usage

list files recursively by size

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"

find all writable (by user) files in a directory tree (use 4 for readable, 1 for executable)


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