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Shows cpu load in percent
Show the current load of the CPU as a percentage. Read the load from /proc/loadavg and convert it using sed: Strip everything after the first whitespace: $ sed -e 's/ .*//' Delete the decimal point: $ sed -e 's/\.//' Remove leading zeroes: $ sed -e 's/^0*//'

Colorize make, gcc, and diff output
Colorize output of make, gcc/g++ or diff, making it easier to read at a glance. They are not distributed with make, diff or gcc, but are usually available in the repositories.

Displays the current time using HTTP
This command will show the current GMT time using HTTP. This might be useful if you just want to know what's the current human-readable and accurate-enough time, without changing the system time, using a simple command that would work regardless of the availability of NTP. Note: To get a quicker and more accurate response, replace google.com with your local NTP server. Also can be used as an alternative to the "htpdate" program: http://www.commandlinefu.com/commands/view/668/set-your-computers-clock-using-http-and-htp-http-time-protocol-when-ntpsntp-is-not-available

Change user, assume environment, stay in current dir
I've used this a number of times troubleshooting user permissions. Instead of just 'su - user' you can throw another hyphen and stay in the original directory.

Check variable has been set

List bash functions defined in .bash_profile or .bashrc

In Mac OS X, read the copy area (CMD + V) and convert text to audible speech

Resume a partially copied file

lsof equivalent on solaris
Report fstat(2) and fcntl(2) information for all open files in each process.

Ad blocking on Ubuntu phone/tablet with hosts file
Will append lines to the hosts file to do some basic ad blocking.


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