Commands by Gurre (1)

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. 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.

Share Your Commands


Check These Out

fix flash video (flv) file (ffmpeg)
Rebuild flv files that are broken (can't seek). This method probably works for other video/audio formats that can become broken in the same way.

check the filesystem and use a progress bar
if you happen to start with out the -C switch then you a killall -USR1 e2fsck

Remove a line from a file using sed (useful for updating known SSH server keys when they change)
For example, to remove line 5 from foo, type: vi +5d +wq foo

Sum columns from CSV column $COL

Create a mirror of a local folder, on a remote server
Create a exact mirror of the local folder "/root/files", on remote server 'remote_server' using SSH command (listening on port 22) (all files & folders on destination server/folder will be deleted)

Copy recursivelly files of specific filetypes
Copying only wmv and mpg files recursively from to

Mortality Countdown
watch the seconds of your life tick away - replace YYYY-mm-dd HH:MM:ss w/ your birthtime.

Check if network cable is plugged in and working correctly
with 'mii-tool -w eth0' you can watch the interface for changes of the link status

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Convert CSV to JSON
Replace 'csv_file.csv' with your filename.


Stay in the loop…

Follow the Tweets.

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.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

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: