Commands by wr8cr8 (10)

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Verify/edit bash history command before executing it
Bash history commands are those that begin with the character ! (eg. the most popular 'sudo !!' Explained here => http://www.commandlinefu.com/commands/view/13). By default bash immediately executes the history command. Setting this shell option will make bash first allow you to verify/edit an history command before executing it. To set this option permanently, put this command in ~/.profile or ~/.bashrc file. To unset this option issue following command. $shopt -u histverify

Command to Show a List of Special Characters for bash prompt (PS1)
I use this command (PS1) to show a list bash prompt's special characters. I tested it against A flavor of Red Hat Linux and Mac OS X

fix flash video (flv) file (ffmpeg)
Rebuild flv files that are broken (can't seek). This method probably works for other video/audio formats that can become broken in the same way.

Maximum PNG compression with optipng, advpng, and advdef
optipng and advancecomp (for the the advpng and advdef tools) are the best FOSS tools for losslessly compressing PNGs. With the above tool chain, you can cut off as much as 20% off a PNG's file size.

Open the last file you edited in Vim.

Run a bash script in debug mode, show output and save it on a file

check open ports without netstat or lsof

check open ports without netstat or lsof

Recursive chmod all *.sh files within the current directory
This command is useful to recursively make executable all "*.sh" files in a folder. This command is useful to apply chmod recursively in a determined kind of file.

list any Linux files without users or groups
suspicious/anomalous ownership may indicate system breach; should return no results


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