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.
If you have a new feature suggestion or find a bug, please get in touch via http://commandlinefu.uservoice.com/
You can sign-in using OpenID credentials, or register a traditional username and password.
First-time OpenID users will be automatically assigned a username which can be changed after signing in.
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,…):
Subscribe to the feed for:
Display a list of local shell scripts soft-linked to /usr/local/bin
Put local shell scripts to local ~/bin/ directory and soft-link them to /usr/local/bin/ which is in the $PATH variable to run them from anywhere.
"find ./ ..." could be replaced with "find $PWD ..." to display absolute path instead of relative path.
Shows the OS X applications downloaded from App Store. Doesn't include manually added apps.
When trying to find an error in a hosted project it's interesting to find out how the source is organized: Are there .inc files? Or .php files only? Or .xml files that probably contain translated texts?
Find's all png's in the current folder and all of its children
pngcrushes all results.
This command is for producing GNU sha256sum-compatible hashes on UNIX systems that don't have sha256sum but do have OpenSSL, such as stock IBM AIX.
1.- Saves a wrapper script for UNIX find that does the following:
A.- Feeds a file to openssl on SHA256 hash calculation mode
B.- Echoes the output followed by the filename
2.- Makes the file executable
3.- Runs find on a directory, only processing files, and running on each one the wrapper script that calculates SHA256 hashes
Pending is figuring out how to verify a sha256sum file on a similar environment.
Goes through all files in the directory specified, uses `stat` to print out last modification time, then sorts numerically in reverse, then uses cut to remove the modified epoch timestamp and finally head to only output the last 10 modified files.
Note that on a Mac `stat` won't work like this, you'll need to use either:
find . -type f -print0 | xargs -0 stat -f '%m%t%Sm %12z %N' | sort -nr | cut -f2- | head
or alternatively do a `brew install coreutils` and then replace `stat` with `gstat` in the original command.
For each directory from the current one, list the counts of files in each of these directories. Change the -maxdepth to drill down further through directories.
basic find implementation for systems that don't actually have find, like an android console without busybox installed.
It eases the way of creating cron jobs of backup scripts.
Just put this line as cron job, and all your backups are called sequentially.
Allows you to forget, when in time, call this backup, just focus on your scripting. Also maintains the way of calling a single backup script when It's needed.
bash-3.2$ find /logs -ls -xdev | sort -nrk 7 | head -10
1761905 205380 -rwxrwxr-x 1 wsadmin logadmin 210095353 Jul 22 01:33 /logs/intlpymt/Trace.log
652689 187360 -rwxrwxr-x 1 wsadmin logadmin 191663182 Jul 21 23:00 /logs/websphere/wsfpp1lppwa1213omsecureServer/SystemOut_13.07.21_23.00.12.log
2380449 186536 -rwxrwxr-x 1 wsadmin logadmin 190819939 Jul 16 14:03 /logs/omset/traceIntl.log.201307161403.lppwa1213.gz
2119524 183888 -rwxrwxr-x 1 wsadmin logadmin 188110111 Jul 22 01:33 /logs/intlpymt/intlpymtria/Trace.log
652816 160332 -rwxrwxr-x 1 wsadmin logadmin 164011871 Aug 14 2012 /logs/websphere/wsfpp1lppwa1213omsecureServer/SystemOut.log_08142012.gzip
653312 128916 -rwxrwxr-x 1 wsadmin logadmin 131873943 Jul 18 10:49 /logs/websphere/heapdump.20130718.104150.27592.0006.phd.201307181406.lppwa1213.gz
653320 128916 -rwxrwxr-x 1 wsadmin logadmin 131873735 Jul 18 10:40 /logs/websphere/heapdump.20130718.104012.27592.0002.phd.201307181406.lppwa1213.gz
653309 128912 -rwxrwxr-x 1 wsadmin logadmin 131867602 Jul 18 10:46 /logs/websphere/heapdump.20130718.104008.27592.0001.phd.201307181405.lppwa1213.gz
653323 128872 -rwxrwxr-x 1 wsadmin logadmin 131828157 Jul 18 10:41 /logs/websphere/heapdump.20130718.104109.27592.0004.phd.201307181407.lppwa1213.gz
652783 120288 -rwxrwxr-x 1 wsadmin logadmin 123047750 Aug 13 2012 /logs/websphere/wsfpp1lppwa1213omsecureServer/SystemOut.log_0813.2012.gzip
Recursively list all files in the current directory & get their md5sum, even if the filename has bad characters.
show directory three
If you have a directory with lot of backups (full backups I mean), when it gets to some size, you could want to empty some space. With this command you'll remove half of the files. The command assumes that your backup files starts with YYYYMMDD or that they go some alphabetical order.
This is usefull to diff 2 paths in branches of software, or in different versions of a same zip file. So you can get the real file diff.
It starts in the current working directory.
It removes the empty directory and its ancestors (unless the ancestor contains other elements than the empty directory itself).
It will print a failure message for every directory that isn't empty.
This command handles correctly directory names containing single or double quotes, spaces or newlines.
If you do not want only to remove all the ancestors, just use:
find . -empty -type d -print0 | xargs -0 rmdir
This command removes and then cvs removes all files in the current directory recursively.