Commands by justsomeguy

Commands by justsomeguy (3)

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Infinite loop ssh

This version won't reconnect if you exit the ssh connection with a non-zero exit code. ConnectTimeout and sleep values knobs for how long to wait for each retry.
This is sample output - yours may be different.
0

h=root@localhost ; while ! ssh -o ConnectTimeout=5 $h true; do sleep 5; done; ssh $h

justsomeguy · 2022-03-05 06:48:06 359
Display disk partition sizes
This is sample output - yours may be different.
8

lsblk -o name,size

justsomeguy · 2022-03-04 04:29:47 373
Calculate days on which Friday the 13th occurs

Alter the years in the first brace expansion to select your year range. Modify date format to your liking but leave " %w" at the end. Show Sample Output
This is sample output - yours may be different.
```
2018 April
2018 July
2019 September
2019 December
2020 March
2020 November
2021 August
2022 May
```
1

for i in {2018..2022}-{01..12}-13; do date --date $i +"%Y %B %w" | sed '/[^5]$/d; s/ 5*$//'; done

justsomeguy · 2018-07-09 15:47:39 241

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list files recursively by size

Get International Space Station sighting information for your city

This command outputs a table of sighting opportunities for the International Space Station. Find the URL for your city here: http://spaceflight.nasa.gov/realdata/sightings/

Set OS X X11 to use installed Mathematica fonts

replace strings in file names

Uses vi style search / replace in bash to rename files. Works with regex's too (I use the following a script to fixup / shorten file names): # Remove complete parenthetical/bracket/brace phrases rename 's/$.*$//g' * rename 's/\[.*\]//g' * rename 's/\{.*\}//g' *

list all hd partitions

Only one command and not dependant on full read access to the devices.

Update twitter with curl

Same as below, but no quotes are necessary when twitting more than one word

Copy files and directories from a remote machine to the local machine

This command will copy files and directories from a remote machine to the local one. Ensure you are in the local directory you want to populate with the remote files before running the command. To copy a directory and it's contents, you could: $ ssh user@host "(cd /path/to/a/directory ; tar cvf - ./targetdir)" | tar xvf - This is especially useful on *nix'es that don't have 'scp' installed by default.

generate iso

Go to parent directory of filename edited in last command

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"

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