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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.
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I use this to generate a playlist with all the podcasts I listen to.
Ordered from most recent to older.
You can use this command to delete CVS/svn folders on given project.
This command kills all processes with 'SomeCommand' in the process name. There are other more elegant ways to extract the process names from ps but they are hard to remember and not portable across platforms. Use this command with caution as you could accidentally kill other matching processes!
xargs is particularly handy in this case because it makes it easy to feed the process IDs to kill and it also ensures that you don't try to feed too many PIDs to kill at once and overflow the command-line buffer.
Note that if you are attempting to kill many thousands of runaway processes at once you should use 'kill -9'. Otherwise the system will try to bring each process into memory before killing it and you could run out of memory. Typically when you want to kill many processes at once it is because you are already in a low memory situation so if you don't 'kill -9' you will make things worse
These part of the command:
svn status | grep '^\?' => find new file or directory on working copy
sed -e 's/^\?//g' => remove "^" character on the first character of file name
xargs svn add => add file to subversion repository
You can modify above command to other circumtances, like revert addition files or commit files that have been modified. ^_^
rpm, sometimes, is not wildcard friendly. To search files installed from package this could be useful.
change PACKAGENAME to any package do you want to search
Will search recursively and output the searchResult.txt in the same folder you are located.
grep ERROR *.log
-bash: /bin/grep: Argument list too long
echo *.log | xargs grep ERROR /dev/null
kills all pids matching the search term of "PROCESS". Be careful what you wish for :)
Note that the file at the given path will have the contents of the (still) deleted file, but it is a new file with a new node number; in other words, this restores the data, but it does not actually "undelete" the old file.
I posted a function declaration encapsulating this functionality to http://www.reddit.com/r/programming/comments/7yx6f/how_to_undelete_any_open_deleted_file_in_linux/c07sqwe (please excuse the crap formatting).
This is a nice way to kill processes.. the example here is for firefox!!! substitute firefox for whatever the process name is...
This is fast and efficient because rm is only run once.
These days, most software distributed in tar files will just contain a directory at the top level, but some tar files don't have this and can leave you with a mess of files in the current folder if you blindly execute
tar zxvf something.tar.gz
This command can help you clean up after such a mistake. However, note that this has the potential to do bad things if someone has been *really* nasty with filenames.
This is a 'killall' command equivalent where it is not available.
Prior to executing it, set the environment variable USERNAME to the username, whose processes you want to kill or replace the username with the $USERNAME on the command above.
Side effect: If any processes from other users, are running with a parameter of $USERNAME, they will be killed as well (assuming you are running this as root user)
[-9] in square brackets at the end of the command is optional and strongly suggested to be your last resort. I do not like to use it as the killed process leaves a lot of mess behind.
finds all forms instanciated into a symfony project, pruning svn files.
Get simple description on each file from /bin dir, in list form, usefull for newbies.
tar options may change ;)
c to compress into a tar file, z for gzip (j for bzip) man tar
-print0 and -0t are usefull for names with spaces, \, etc.