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Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.
Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):
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Choose the /var/log/sa/saXX log based on what day you want to view. You can use ifconfig to find the name of the interface.
You can use the -s flag to specify a certain time period, e.g. -s 12:00:00 -e 14:00:00
for redhat systems works sometimes :S tested on dell poweredge r7+ systems
show off how big your disks are
on some distro's you have to replace "BogoMIPS" with "bogomips".
Very quick! Based only on the content sizes and the character counts of filenames. If both numbers are equal then two (or more) directories seem to be most likely identical.
if in doubt apply:
diff -rq path_to_dir1 path_to_dir2
AWK function taken from here:
If you creates a virtualenv just for a test, and at the end, wants remove all installed packages. This is the lever.
Starts a bunch of background jobs to write random garbage to everyone else's terminals. The "\n" in IFS should be an actual newline, but I can't put that in the command.
recurse through all files, get the message hash, flip the output as filename, hash value
With this command, you can check the difference between the volumes mounted and the volume in /etc/fstab.
Using find's internal stat to get the file size is about 50 times faster than using -exec stat.
Find files and calculate size with stat of result in shell
Pass the files path to finfo(), can be unix path, dos path, relative or absolute. The file is converted into an absolute nix path, then checked to see if it is in-fact a regular/existing file. Then converted into an absolute windows path and sent to "wmic". Then magic, you have windows file details right in the terminal. Uses: cygwin, cygpath, sed, and awk. Needs Windows WMI "wmic.exe" to be operational. The output is corrected for easy...
finfo "/cygdrive/c/Program Files/notepad.exe"
Fetches latest stable release version from first entry between tags
It is not the installed size in files, but the size of RPM packages.
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.