Commands by jmaley (0)

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Delete empty directories
Recursively delete empty directories. Use with care.

Summarise the size of all files matching a simple regex
Use the find command to match certain files and summarise their total size in KBytes.

tar copy
Just a copy of a big dir when you wan't things like ownership and date etc etc to be untouched. Note: Updated with the ideas from "mpb".

Append stdout and stderr to a file, and print stderr to the screen [bash]
Useful for cron jobs -- all output will be logged but only errors will cause email to be sent. NB the order of "2>&1" and ">> logfile" is important, it doesn't work if you reverse them (everything goes to the logfile, nothing left for tee).

Flush and then immediately start watching a file
This is useful for keeping an eye on an error log while developing. The !^ pulls the first arg from the previous command (which needs to be run in a sub-shell for this shortcut to work).

HTTP Get of a web page via proxy server with login credentials
If you are behind a proxy server and have to authenticate with proxy server to browser web pages then you have to pass proxy server address and its port number along with user credentials to curl to got GET the page using curl. Example : "curl -U srikanth -x 167.85.103.70:8080 http://www.yahoo.com". In case you don't specify the password (as in the above example), curl will prompt to enter the password at the command line.

Use lynx to run repeating website actions
This command will tell lynx to read keystrokes from the specified file - which can be used in a cronjob to auto-login on websites that give you points for logging in once a day *cough cough* (which is why I used -accept_all_cookies). For creating your keystroke file, use: $ lynx -cmd_log yourfile

Find last reboot time
Displays time of last system boot

Text to image with transparent background
Create transparent image to use as icon, watermark for other images, etc.

take a look to command before action
add |sh when you agree the list, I often use that method to prevent typos in dangerous or long operations


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