Commands by lucasjr76 (1)

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Quick command line math
expr will give you a quick way to do basic math from the CLI. Make sure you escape things like * and leave a space between operators and digits.

how to find the active X (X11/xorg) username and DISPLAY variable
Requires consolekit (works in e.g. Ubuntu). Here x11-display is DISPLAY

Processes by CPU usage

cd up a number of levels
Instead of typing "cd ../../.." you can type ".. 3". For extremely lazy typists, you can add this alias: alias ...=".. 2" ....=".. 3" - so now you can write just .... !!! NB the .. function needs to be "source"d or included in your startup scripts, perhaps .bashrc.

Convert JSON to YAML
Convert JSON to YAML. Note that you'll need to have PyYaml installed.

Fix subtitle timing (for .sub files)
Fix a microdvd (.sub) subtitle timing by making the phrases to appear 600 frames earlier.

find the path of the java called from the command line
The output will likely point to '/etc/alternatives/java'. So find out where that points by issuing ls -l like this: ls -l /etc/alternatives/java

Generate a random password 30 characters long

Sort a character string
Sorts a character string, using common shell commands.

Backup your LDAP
Simple way to backup your LDAP entries: put this line on your crontab. The -n switch identifies the dbnum you want to backup (alternatively you can use -b suffix. Check man slapcat for your personal switches)


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