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.
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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.
» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10
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,…):
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We can put this inside a function:
fxray() { curl -s http://urlxray.com/display.php?url="$1" | grep -o '<title>.*</title>' | sed 's/<title>.*--> \(.*\)<\/title>/\1/g'; };
fxray http://tinyurl.com/demo-xray
If we want files with more than one extension, like .tar.gz, only appear the latest, .gz:
ls -Xp /path/to/dir | grep -Eo "\.[^./]+$" | uniq
Another alternative is to define a function:
lower() {
echo ${@,,}
}
lower StrinG
Adding the exclamation mark to the image geometry ignores the original aspect ratio.
More info about image geometry:
http://www.imagemagick.org/script/command-line-processing.php#geometry
'ac' is included in the package 'acct', which is described as "The GNU Accounting utilities for process and login accounting". Other interesting flags are:
* print statistics for a specified user
ac -d username
* print statistics for all the users
ac -p
With my command, the output is also printed in a sexagesimal, more readable, style.
This is really fast :)
time find . -name \*.c | xargs wc -l | tail -1 | awk '{print $1}'
204753
real 0m0.191s
user 0m0.068s
sys 0m0.116s