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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.
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Copies a directory structure from /home/ to /backups/home (notice that the destination does not have a trailing slash)
Prints an easy-to-copy color code for each color.
Really helpfull when play with files having spaces an other bad name. Easy to store and access names and path in just a field while saving it in a file.
This format (URL) is directly supported by nautilus and firefox (and other browsers)
outputs a f=220Hz guitar string sound (fifth string A)
some numbers have strange output!
some numbers output nothing!
some numbers will kill your terminal! even logout when running in tty
but i don't know why! can anyone explain it to me?
use it to add a random boolean switch to your script
use it to stagger cronjob or to get a random number
increase the range by replacing 100 with your own max value
This command is useful for searching through a whole folder worth of pdf files.
Creates a git repository in a predefined location.
git gc should be run on all git repositories every 100 commits. This will help do do so if you have many git repositories ;-)
How much memory is chrome sucking?
Well, this is quite useful for testing if your hardware watchdog is working properly.
POSIX compliant arithmetic evaluation.
list all java process info.
Replace the first part of the command above with the appropriate timezone string. Eg: 'Europe/London' or for UTC - 'Etc/UTC'. The appropriate string can be found from https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
This is useful when your server is installed by a data centre (managed hardware, VPS, etc) and the timezone is not usually set to the one your prefer.