Commands by unixmonkey1789 (1)

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Downsample mp3s to 128K
This will lower the quality of mp3 files, but is necessary to play them on some mobile devices.

Create thumbnails and a HTML page for listing them (with links to sources)
The input images are assume to have the "JPG" extension. Mogrify will overwrite any gif images with the same name! Will not work with names with spaces.

Convert CSV to JSON
Replace 'csv_file.csv' with your filename.

Create a file of repeated, non-zero
dd can be used with /dev/zero to easily create a file of all zero-bytes. Pipe that through tr and use octal conversions to change the byte values from zero to 0xff (octal 0377). You can replace 0377 with the byte of your choice. You can also use \\0 and \\377 instead of the quoted version.

The NMAP command you can use scan for the Conficker virus on your LAN
This was posted on reddit. replace 192.168.0.1-256 with the IP's you want to check.

silent/shh - shorthand to make commands really quiet
Sometimes I just want to run a command quietly but all that keyboard shifting makes my fingers hurt. This little function does the job eg.: $ if shh type less; then PAGER=less; fi

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"

Equivalent to ifconfig -a in HPUX
not shown ifconfig error

Run a command for a given time
or "Execute a command with a timeout" Run a command in background, sleep 10 seconds, kill it. $! is the process id of the most recently executed background command. You can test it with: find /& sleep10; kill $!

convert all flac files in a folder to mp3 files with a bitrate of 192 kbps


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