Commands tagged folder (19)

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Verify MD5SUMS but only print failures
All valid files are withheld so only failures show up. No output, all checks good.

Extract audio from start to end position from a video
mplayer -vc null -vo null -ao pcm Firefly\ ep\ 10.avi -ss 195 -endpos 246 Will create file audiodump.wav with audio from second 195 to second 246 (the opnening theme).

Sort and count subjects of emails stuck in Exim queue

Calculate days on which Friday the 13th occurs (inspired from the work of the user justsomeguy)
Friday is the 5th day of the week, monday is the 1st. Output may be affected by locale.

Apply permissions only to files
To apply only to dirs: $ chmod 755 $(find . -type d) Use -R parameters for recursive walk.

a find and replace within text-based files, for batch text replacement, not using perl
Use sed to edit in-place a list of files returned by find.

Advanced python tracing
Trace python statement execution and syscalls invoked during that simultaneously

Export MySQL tables that begin with a string

check open ports without netstat or lsof

Extract tarball from internet without local saving


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