Commands by WilliamJck (0)

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List only executables installed by a debian package
Safe for whitespaces in names.

Rename files in batch

Set an alarm to wake up [2]
Set an alarm to starts in specific time.

easily convert one unit to another
Easily convert units of similar measurement. May also be invoked alone, units.

Rename all files in lower case
rename is a really powerfull to, as its name suggests, rename files

Start a local web server in the current directory on a random dynamic port.

Write a listing of all directories and files on the computer to a compressed file.
This command is meant to be used to make a lightweight backup, for when you want to know which files might be missing or changed, but you don't care about their contents (because you have some way to recover them). Explanation of parts: "ls -RFal /" lists all files in and below the root directory, along with their permissions and some other metadata. I think sudo is necessary to allow ls to read the metadata of certain files. "| gzip" compresses the result, from 177 MB to 16 MB in my case. "> all_files_list.txt.gz" saves the result to a file in the current directory called all_files_list.txt.gz. This name can be changed, of course.

Make directory including intermediate directories
This will create the intermediate directories that do not exist. I did not know about this for a long time.

Get your external IP address ( 10 characters long )
Shortest url to a external IP-service, 10 characters.

Find broken symlinks in the current directory and its subdirectories.
This is best run as root to avoid permission denials that can produce false positives. Obviously you can specify a directory in the usual way: $ find -L dirname -type l I can't remember where I read about this or who deserves the credit for it. The find(1) manual page hints strongly toward it, however.

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