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.
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Wow, didn't really expect you to read this far down. The latest iteration of the site is in open beta. It's a gentle open beta-- not in prime-time just yet. It's being hosted over at UpGuard (link) and you are more than welcome to give it a shot. Couple things:
lsblk | grep mountpoint
displays a list of all file extensions in current directory and how many files there are of each type of extension in ascending order (case insensitive)
When running a long `diff -r` over folders, this simulates a "verbose" mode where you can see where diff is in the tree.
Replace $file with the first part of the path being compared.
Specific to OSX.
With this command, you can check the difference between the volumes mounted and the volume in /etc/fstab.
This command removes all ruby gems except the default ones that can not be removed. It is based on http://geekystuff.net/2009/01/14/remove-all-ruby-gems/
This command will show the sum total of memory used in gigabytes by a program that spawns multiple instances of itself. Replace chrome with whatever program's memory usage you are investigating. This command is rather useless on software that only spawns a single instance of itself.
This lists the number of ogg/mp3/wav/flac files in each subdirectory of the current directory. The output can be sorted by piping it into "sort -n".
Shows all available keyboard bindings in bash. Pretty printing.
Fetches latest stable release version from first entry between tags
Checks for syntax errors in PHP files modified in current working copy of a Git repository.
Creates a temporary ram partition
to make a 3gb partition (Defaults to 1gb)
-c will count the number of times your search matches in the file.
Kills all processes with a certain string. This was done to kill all ssh sessions openned by zenoss which look like: usr/bin/ssh /opt/zenoss/bin/zenmodeler