commandlinefu.com is the place to record those command-line gems that you return to again and again.
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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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Usefull if you only want to see the package names, or if you want to use them in a script.
On the Mac, the 'ls' function can sort based on month/day/time, but seems to lack ability to filter on the Year field (#9 among the long listed fields). The sorted list continuously increases the 'START' year for the most recently accessed set of files. The final month printed will be the highest month that appeared in that START year. The command does its magic on the current directory, and suitably discards all entries that are themselves directories. If you expect files dating prior to 2002, change the START year accordingly.
This version also attaches to new processes forked by the parent apache process. That way you can trace all current and *future* apache processes.
On wired connections set 'eth0' instead of 'wlan0'
Replace \-dev with whatever you wanna search for
completely remove those packages that leave files in debian / ubuntu marked with rc and not removed completely with traditional tools
It'll print the file names preserving the spaces in their names and adding new line after every new filename.
I wrote this to quickly find out how many files in any directory is owned by a particular user. This can be extended using pipe and grep to do much more.
Also removes translator comments. You can remove the header by omitting --keep-header, but if your msgids contain non-ASCII characters you will need the header to specify a suitable charset.
This command will take the files in a directory, rename them, and then number them from 1...N.
Black belt stuff.
Hell of a time saver.
I run this via crontab every one minute on my machine occasionally to see if a process is eating up my system's resources.