Commands by daniele (4)

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Testing hard disk writing speed

display a smiling smiley if the command succeeded and a sad smiley if the command failed
you could save the code between if and fi to a shell script named smiley.sh with the first argument as and then do a smiley.sh to see if the command succeeded. a bit needless but who cares ;)

Quickly batch resize images
-geometry (preserves values of height and width given, and aspect ratio). WARNING: While 'resize' creates resized copies of original files, 'mogrify' works on the original files, replacing them. It will overwrite the source files, use with caution, and backup regularly.

Get your commandlinefu points (upvotes - downvotes)
This will calculate the your commandlinefu votes (upvotes - downvotes). Hopefully this will boost my commandlinefu points.

List only directories, one per line
omit the 1 (one) if you don't need one-per-line

list files recursively by size

Grep syslog today last hour
Uses date to grep de logfile for today and uses it to get the last hour logs. Can be used to get last minute logs or today's logs.

A fun thing to do with ram is actually open it up and take a peek. This command will show you all the string (plain text) values in ram
cat? dd? RTFM

How to search for files and open all of them in tabbed vim editor.
Opening several files at once in Vim can be very easy in connection with find command.

Arch Linux: Search for missing libraries using pacman
If, while using a program, you get an error similar to: error while loading shared libraries: libusb-0.1.so.4: cannot open shared object file: No such file or directory Use pacman or pkgfile to search for the package that owns the missing library https://wiki.archlinux.org/index.php/General_troubleshooting#Message:_%22error_while_loading_shared_libraries%22


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