Commands by eleffie (2)

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

Change the ownership of all files owned by one user.
Finds all files in /home owned by UID 1056 and changes to 2056.

Geolocate a given IP address

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"

Unix commandline history substitution like ^foo^bar BUT for multiple replacements
#1 You invoked a command chain. #2 You globaly replace the scriptnames and execute them direct #3 The new executed command chain [# ^foo^bar] would only replace the firts match [foo] with [bar].

Convert JSON to YAML
Requires installing json2yaml via npm: npm install -g json2yaml (can also pipe from stdin) Ref: https://www.npmjs.com/package/json2yaml

run command on a group of nodes in parallel
The pee command is in the moreutils package.

Rename files in batch

Calculate days on which Friday the 13th occurs (inspired from the work of the user justsomeguy)
Friday is the 5th day of the week, monday is the 1st. Output may be affected by locale.

Save a file you edited in vim without the needed permissions
probably just like 1204, but uses tee as a filter (+ I actually understand how this one works)


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