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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.
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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This will tell you who has the most Apache connections by IP (replace IPHERE with the actual IP you wish to check). Or if you wish, remove | grep -c IPHERE for the full list.
List top 20 IP from which TCP connection is in SYN_RECV state.
Useful on web servers to detect a syn flood attack.
Replace SYN_ with ESTA to find established connections
usefull in case of abuser/DoS attacks.
checking files in current and sub directories, finding out the files containing "sampleString" and removing the containing lines from the file.
* Beware that The command will update the original file [no backup].
The command can be extended if play with 'find' command together,
e.g. it is possible to execute on certain type of files: *.xml, *.txt... (find -name "*.xml" | grep....)
if anybody knows a better solution on that, please drop a comment. thx.
Create a tgz archive of all the files containing local changes relative to a subversion repository.
Add the '-q' option to only include files under version control:
svn st -q | cut -c 8- | sed 's/^/\"/;s/$/\"/' | xargs tar -czvf ../backup.tgz
Useful if you are not able to commit yet but want to create a quick backup of your work. Of course if you find yourself needing this it's probably a sign you should be using a branch, patches or distributed version control (git, mercurial, etc..)
Use the aliased command 'nsl'
Greps IRC logs for phrases and lists users who said them.