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Extract audio from Flash video (*.flv) as mp3 file

Show tcp connections sorted by Host / Most connections

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

Set all CPU cores' CPU frequency scaling governor to maximum performance

In-Place search/replace with datestamped backup
Does an in situ search-replace but leaves a datestamped backup. A variation with more precision: sed -i.`date +%Y%m%d%H%M%S 's/pattern/replace' [filename]

Access folder "-"
If you try to access cd - you go to the last folder you were in.

Stop long commands wrapping around and over-writing itself in the Bash shell
add the command either in /etc/profile or ~/.bash_profile so that this is available to your shell.

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

Unzip and untar a *.tar.gz file in one go to a specific directory
A *.tar.gz file needs to be unzipped & then untarred. Previously I might have unzipped first with $gunzip -d file.tar.gz and then untarred the result with $tar -xvf file.tar (Options are extract, verbose, file) Using the -z (decompress) option on tar avoids the use of gzip (or gunzip) first. Additionally the -C option will specify the directory to extract to.

Execute a command on multiple hosts in parallel
Ssh to host1, host2, and host3, executing on each host and saving the output in {host}.log. I don't have the 'parallel' command installed, otherwise it sounds interesting and less cryptic.


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