Commands by erdmanthurman (0)

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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"

dd if=/dev/null of=/dev/sda
removes all files/filesystems of a harddisk. It removes EVERYTHING of your hard disk. Be carefull when to select a device. It does not prompt for and second check.

Remove everything except that file
it will remove everything except the file names matching you can use also use wildcards

List the Sizes of Folders and Directories

Find the package that installed a command

Create backup copy of file, adding suffix of the date of the file modification (NOT today's date)
If your `date` command has `-r` option, you don't need `stat`

Find usb device in realtime
Using this command you can track a moment when usb device was attached.

Execute multiple commands from history
Assuming that 219,229 and 221 are entries in history, I recall them in a single line for execute multiple commands 219 ifdown wlan0 ... 221 ifup wlan0 ... 229 iwconfig wlan0 mode Managed so the result is execution of # ifdown wlan0 ; iwconfig wlan0 mode Managed ; ifup wlan0

Convert embedded spaces in filenames to "_" (underscore)
This command converts filenames with embedded spaces in the current directory replacing spaces with the underscore ("_") character.

Google URL shortener
use curl and sed to shorten an url via goo.gl


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