Commands by nabil_kadimi (2)

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route output as next command's parameters

Do not clear the screen after viewing a file with less
From the manpage: $ man less -X or --no-init Disables sending the termcap initialization and deinitialization strings to the terminal. This is sometimes desirable if the deinitialization string does something unnecessary, like clearing the screen. Bonus: If you want to clear the screen after viewing a file this way that had sensitive information, hit or just type clear. Since is readily available, I don't know why less bothers to automatically clear. If you're viewing the file at all, chances are you want to see the output from it after you quit.

How much RAM is Apache using?
Display the amount of memory used by all the httpd processes. Great in case you are being Slashdoted!

Create a transition between two videos
We take the first 50 frames of a.mp4 for track a, and 24 blank frames followed by b.mp4 for track b. We then create a transition from track a to track b starting from frame 25 and ending at frame 49. The output is stored in out.mp4 To view the results without saving remove "-consumer avformat:out.mp4" from the end. Documentation of the mlt framework and the melt command can be found here: http://www.mltframework.org/bin/view/MLT/Documentation

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

Convert df command to posix; uber GREPable
It is a pain grep-ing/sed-ing/awk-ing plain old df. POSIX it!

Save a file you edited in vim without the needed permissions
probably just like 1204, but uses tee as a filter (+ I actually understand how this one works)

Create a new file

bulk rename files with sed, one-liner
Far from my favorite, but works in sh and with an old sed that doesn't support '-E'

rotate a one page pdf to 90 Degrees Clockwise
This can be taken from the pdftk docs http://www.pdflabs.com/docs/pdftk-man-page/ http://www.pdflabs.com/docs/pdftk-cli-examples/ , but the command examples are not simple.


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