Commands by houghi (19)

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Create a mirror of a local folder, on a remote server
Create a exact mirror of the local folder "/root/files", on remote server 'remote_server' using SSH command (listening on port 22) (all files & folders on destination server/folder will be deleted)

tcpdump whole packets to file in ascii and hex with ip adresses instead of hostname

Sorted list of established destination connections
no need grep. its redundant when awk is present.

Clear mistyped passwords from password prompt
Type ^u at password prompt to clear a mistyped password.

mean color of an image
You can get the mean value for the colours in an image. Then you can determine, in general, how dark or bright is the image and run some other actions based on that. I'll recommend to readjust the brightness of the images using +sigmoidal-contrast option of imagemagick convert command.

Extract audio stream from an video file using mencoder
This command extracts the audio stream of the video in $file and stores it in a file where the original suffix is changed to .mp3

Set laptop display brightness
An alternative which does not require to be root

Compress a series of png pictures to an avi movie.
cd /path/to/your/png_pics mencoder "mf://*.png" -mf fps=2 -o output.avi -ovc lavc -lavcopts vcodec=mpeg4 then you can get a movie named output.avi.

32 bits or 64 bits?
Easy and direct way to find this out.

Get first Git commit hash
https://git.kernel.org/cgit/git/git.git/commit/?id=ad5aeeded3295589b2573b143f754762a56f8f82


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