Commands using egrep (220)

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

Advanced python tracing
Trace python statement execution and syscalls invoked during that simultaneously

Suspend to ram
No need to be root to do that. Relies on UPower (previously known as DeviceKit-Power).

Download YouTube Videos using wget and youtube-dl and just using the video link
in place of "output-filename.mp4" put the name you want the file to be named with. in place of "youtube-video-link" put the link of the Video page eg: http://www.youtube.com/watch?v=AclA-7YntvE in place of "format-number" put the number of the file format you would like How to get the "format-number" to get format number type in below command before running this command $ youtube-dl -F "youtube-video-link" and it will list all the available formats with the format number, like to download in 360p mp4 use the number "18" To automatically let it fetch the best quality available just remove the -f "format-number" and you are good to go.

Combine all .mpeg files in current directory into one big one.
Good old cat & output redirection. Using this method you can combine all kinds of things - even mpeg files. My video camera makes a series of .mpeg files that are broken into 4gb chunks. Using this command I can easily join them together. Even better, combined with the cp command the files can be copied and joined in one step.

Get IP address from domain
I'm not sure how reliable this command is, but it works for my needs. Here's also a variant using grep. nslookup www.example.com | grep "^Address: " | awk '{print $2}'

Copy a folder with progress with pv

list files recursively by size

Print text string vertically, one character per line.

Remove audio stream from a media file
This syntax also works for ffmpeg as avconv is a fork of ffmpeg.

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"


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: