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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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On CentOS at least, date returns a boolean for the common date string formats, including YYYY-MM-DD. In the sample output, you can see various invalid dates returning 0 whereas a simple regex check would return 1 for the invalid dates.
-d, --date=STRING display time described by STRING, not `now'
The version of date on OS X does not appear to have this same option.
Monitors the current directory for changes to HAML files and converts them to HTML.
Use less random number resources and less commands
The glob pattern * expands to all files, no need for the 'ls' command.
The quotes around "$i" make sure filenames with spaces in them are handled correctly.
mplayer determines if it is a media file and plays it, or gives errors and the loop asks if this file has to be removed.
shows you the symlinks in the current directory, recursively, but without following them
Perform a dns zone transfer (if is allowed on target dns server) and print result.
echo "..1234567." | cut -c $(range 3 7)
omit "> ~/Desktop/MyAppList`date +%s.txt`" if you don't want to print it to a file on your desktop and instead only want to display to console
created and tested on:
ProductName: Mac OS X
find the files locked by rcs utility
Use this to find identify if dirs mostly contain large or small files.
whereis (1) - locate the binary, source, and manual page files for a command
Not actually better, just expanded a bit. The "whereis" command has the following output:
gcc: /usr/bin/gcc /usr/lib/gcc /usr/bin/X11/gcc /usr/share/man/man1/gcc.1.gz
therefore the 'ls' error on first line, which could be eliminated with a little extra work.
This probably only works without modifications in RHEL/CentOS/Fedora.
Ssh to your co-worker's box and watch them go crazy when the cd player ejects
This will crop each page of the PDF by 10mm left, 11cm bottom, 22pts right, and nothing from the top.
For all of the jpgs in a directory, determine their size and if below a threshold remove them forcefully.