commandlinefu.com is the place to record those command-line gems that you return to again and again.
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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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If you run dpkg --clear-selections or have otherwise selected installed packages for deinstall, but want to undo it, run this. It will set all installed packages back to installed status so that they won't be removed by commands like "dpkg -Pa"
netstat will list all open ports on the system, unix sockets, tcp sockets and udp sockets. the t flag limits to tcp ports the l flag limits to listening ports and the n flag disables the translation of port to service ( ie :25 displayed instead of :smtp ). then grep for the port you are interested in preceeded by a colon.
Processes biglion quantity of sold ebay coupons/bonus codes, so you can know approximate count of users who buyed the coupons and when sales are come up again.
You can change sleep parameter so script will work slowly or faster (default is 5 seconds).
Additional requirements: curl
Standart tools used: awk, date, cat, grep (bash)
Access www.kernel.org and download the last stable linux kernel release.
Replace "foo" with "bar" in all files in current directory recursively
"git grep" automatically excludes untracked files (e.g. compiler output) and files under .git directory. If no directory or file is given, it will recursively search through the current directory.
This command will delete all files and folders except 'skipme'. it could be a file or a folder.
This script can be used to download enclosed files from a RSS feed. For example, it can be used to download mp3 files from a podcasts RSS feed.
Very slick way to check your motherboard manufacturer, product name, version and serial number.
greps your bash history for whatever you type in at the end returning it in reverse chronological order (most recent invocations first), should work on all distros.
works well as an alias
Took one of the samples, added capitalization and removes in between spaces.
The final "echo" is just for readability.
set BLOCK to "title" or any other HTML / RSS / XML tag and curl URL to get everything in-between e.g. some text