Commands tagged grep (397)

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Get the total length of all videos in the current dir in H:m:s
You're behind on your TV catch-up, but how far behind? This command tries to open mplayer against all files in the current dir. If it's a video file it will contain ID_LENGTH, which is summed and output in hours, minutes and seconds. Someone better at awk could probably reduce this down a lot.

Send data securly over the net.
Using OpenSSL we can encrypt any input we wish and then use Netcat to create a socket which can be connected to from an externally source (even using a Web Browser)

Find the package that installed a command

Stream YouTube URL directly to mplayer
The original doesn't work for me - but this does. I'm guessing that Youtube updated the video page so the original doesn't work.

Show the 20 most CPU/Memory hungry processes
This command will show the 20 processes using the most CPU time (hungriest at the bottom). You can see the 20 most memory intensive processes (hungriest at the bottom) by running: $ ps aux | sort +3n | tail -20 Or, run both: $ echo "CPU:" && ps aux | sort +2n | tail -20 && echo "Memory:" && ps aux | sort +3n | tail -20

Display last exit status of a command
The variable ? contain the last exit status of a command, it can be printed for troubleshooting purpose.

Count all the files in the directory and child directories

check open ports without netstat or lsof

add a ip address to a network device
Allows to add more than one ip address to one network device.

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"


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