Commands by madsen (1)

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full path listing in /directory/path/* of javascript files.
file listing in /directory/path/* of specific files such as javascript(js) .

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)

Countdown Clock
Simple countdown clock that should be quite portable across any Bourne-compatible shell. I used to teach for a living, and I would run this code when it was time for a break. Usually, I would set "MIN" to 15 for a 15-minute break. The computer would be connected to a projector, so this would be projected on screen, front and center, for all to see.

Stamp a text line on top of the pdf pages.
To quickly add some remark, comment, stamp text, ... on top of (each of) the pages of the input pdf file.

Rename all (jpg) files written as 3 number in 4 numbers.
Useful if you have a list of images called 1 2 3 4 and so on, you can adapt it to rewrite it as 4 (in this example) 0-padded number.

Get your external IP address without curl
Curl is not installed by default on many common distros anymore. wget always is :) $ wget -qO- ifconfig.me/ip

Execute a command with a timeout
In this example the command "somecommand" will be executed and sent a SIGALARM signal if it runs for more than 10 seconds. It uses the perl alarm function. It's not 100% accurate on timing, but close enough. I found this really useful when executing scripts and commands that I knew might hang E.g. ones that connect to services that might not be running. Importantly this can be used within a sequential script. The command will not release control until either the command completes or the timeout is hit.

Find out what package some command belongs to (on RPM systems)
Replace 'more' command with any command which is in your PATH.

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

When was your OS installed?
Show time and date when you installed your OS.


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