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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,…):
Subscribe to the feed for:
Bash shortcut to work with the last argument of your last command
Quick command to check if Perl library is installed on your server.
E.g. Useful for hiding spoilers in reviews, etc.
joins multiple lines to create single line with comma separated values. for example if we have an email addresses one per line (copy&paste from spreadsheet) it will oputput one line with comman separated addresses to put it to email client.
From a saved page of google search results, split out all of the links for the results. Useful for creating apache rewrite rules from.
Encodes HTML entities from input (file or stdin) so it's possible to directly past the result to a blog or HTML source file.
If the file content is :
-
Blah blah blah
ABC
hello blah blah blah
bloh bloh bloh
DEF
Bah bah bah
-
You'll get:
-
ABC
hello blah blah blah
bloh bloh bloh
DEF
Example: fuman sed
this is handy when the hubmachine is the only machine that can connect to the destination machine (allowed on ip by firewall) and you want to access it from your laptop.
Pipe viewer is a terminal-based tool for monitoring the progress of data through a pipeline. It can be inserted into any normal pipeline between two processes to give a visual indication of how quickly data is passing through, how long it has taken, how near to completion it is, and an estimate of how long it will be until completion. Source: http://www.catonmat.net/blog/unix-utilities-pipe-viewer/
This command is useful for separating a text file where all the words are in one line. Any group of spaces will be replaced with a single newline. Instead of one long line of tokens. You'll have a long list of tokens. One token per line.
If you have a file full of numbers written line by line, you can sum every line to get the total.
With a file like this:
3443535
9878977
67554
987798
232324
you will got:
14610188
This script first find all files which contains word xxxxx recursively. Then replace the word xxxxx to yyyyy of the files.
Use case:
- Web site domain change
- Function name change of the program