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:
Type the command in the terminal and press enter to create the tweet() function. Then run as follows:
tweet MyTwitterAccount "My message goes here"
It will prompt you for password. Make sure that you use escape "\" character in message for showing varialbles or markup.
This create an array 'a' with wole lines. only one occurrence of each line - Not Get lines ++ !
First look into /etc/modules if you have unionfs (or squashfs) support. If not, add the modules. UnionFS combines two filesystems. If there is a need to write a file, /tmp/unioncache will be used to write files (first create that directory). Reads will be done where the file is found first.
use the locate command to find files on the system and verify they exist (-e) then display each one in full details.
show file withou duplicated lines
Copies a dir structure without the files in it.
Replace 60 with the number of minutes until you want the machine to shut down.
Alternatively give an absolute time in the format hh:mm (shutdown -h 9:30)
Or shutdown right away (shutdown -h now)
man nautilus (1) - the GNOME File Manager
ps But if it hang up, you should kill it with -9 of couse
-p will preserve the file mode, ownership, and timestamps
-r will copy files recursively
also, if you want to keep symlinks in addition to the above: use the -a/--archive option
This will download a Youtube playlist and mostly anything http://code.google.com/apis/youtube/2.0/reference.html#Video_Feeds
The files will be saved by $id.flv
It's the same like 'cp -p' if available. It's faster over networks than scp. If you have to copy gigs of data you could also use netcat and the tar -z option in conjunction -- on the receiving end do:
# nc -l 7000 | tar -xzvpf -
...and on the sending end do:
# tar -czf - * | nc otherhost 7000
This will allow you to watch as matches occur in real-time. To filter out only ACCEPT, DROP, LOG..etc, then run the following command: watch 'iptables -nvL | grep -v "0 0" && grep "ACCEPT"' The -v is used to do an inverted filter. ie. NOT "0 0"
It only works in zsh
Sqlite database keeps collecting cruft as time passes, which can be cleaned by the 'vacuum;' command. This command cleans up the cruft in all sqlite files relating to the user you have logged in as. This command has to be run when firefox is not running, or it will exit displaying the pid of the firefox running.
List files and sizes
Reverse DNS lookups, from a file with list of IP's, here the file is called lookups.txt
Ping sweep without NMAP
DNS cache snooping
Show account security settings