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Find the package that installed a command

Checks the syntax of all PHP files in and below the current working directory
Uses the PHP binary to check the syntax of all .php files in or below the current working directory. Really handy for doing that last minute check before you commit code to the repository.

convert from hexidecimal or octal to decimal
Bash can accept '0x' and '0' notation for hexidecimal and octal numbers, so you just have to output the values.

Rename files in batch

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"

List files with quotes around each filename

while using lxde and being blinded by your laptop screen, you can type:
I'm not sure what apt this is, but it seems to work on most X screens, an is useful for saving power, and not straining your eyes

Get all shellcode on binary file from objdump
Tired copy paste to get opcode from objdump huh ? Get more @ http://gunslingerc0de.wordpress.com

Check syntax of remote ruby file

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