commandlinefu.com is the place to record those command-line gems that you return to again and again.
Delete that bloated snippets file you've been using and share your personal repository with the world. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.
If you have a new feature suggestion or find a bug, please get in touch via http://commandlinefu.uservoice.com/
You can sign-in using OpenID credentials, or register a traditional username and password.
First-time OpenID users will be automatically assigned a username which can be changed after signing in.
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,…):
Subscribe to the feed for:
Creates a consistent datapumpt export on an Oracle database with the current sequence number, while the system is running and changes happens on the database.
Mostly for Norwegians, but easily adoptable to others. Very handy if you are brainstorming for a new domainname.
Will only display the available ones..
You can usually do this better with dig, but if you dont have dig, or the TLD only have an online service to check with, this will be usefull..
recently some in the #linux shared this. to find out the kernel version name from the binary without using uname
Log a command's votes,
gnuplot -persist <(echo "plot 'votes' with lines")
From Hong Kong Observatory wap site ;)
The ^$ within the quotes is a regular expression: ^=beginning of line, $=end of line, with no characters between.
You're behind on your TV catch-up, but how far behind? This command tries to open mplayer against all files in the current dir. If it's a video file it will contain ID_LENGTH, which is summed and output in hours, minutes and seconds.
Someone better at awk could probably reduce this down a lot.
Output is from Debian Lenny
This is how I typically grep. -R recurse into subdirectories, -n show line numbers of matches, -i ignore case, -s suppress "doesn't exist" and "can't read" messages, -I ignore binary files (technically, process them as having no matches, important for showing inverted results with -v)
I have grep aliased to "grep --color=auto" as well, but that's a matter of formatting not function.
Searches all files,dirs (also hidden) recursively
shorter typing with no need to use xargs.
List all text files in the current directory.
After executing this, click on a window you want to track X Window events in.
Explaination: "xev will track events in the window with the following -id, which we get by greping window information obtained by xwininfo"
Show apps that use internet connection at the moment.
Can be used to discover what programms create internet traffic. Skip the part after awk to get more details, though it will not work showing only unique processes.
This version will work with other languages such as Spanish and Portuguese, if the word for "ESTABLISHED" still contain the fragment "STAB"(e.g. "ESTABELECIDO")
This corrects duplicate output from the previous command.
Can be used to discover what programms create internet traffic. Skip the part after awk to get more details.
Has anyone an idea why the uniq doesn't work propperly here (see sample output)?
This is just for fun.
This obey that you don't match any broadcast or network addresses and stay between 126.96.36.199 - 254.254.254.254
regex to match an ip
Not as far off as you thought, now is it?