Commands using ps (300)

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FInd the 10 biggest files taking up disk space

Recursively search and replace old with new string, inside every instance of filename.ext
This is a slightly modified version of http://www.commandlinefu.com/commands/view/4283/recursive-search-and-replace-old-with-new-string-inside-files (which did not work due to incorrect syntax) with the added option to sed inside only files named filename.ext

list block devices
Shows all block devices in a tree with descruptions of what they are.

cpu process limitation for specific processname like java,kibana
apt-get install cpulimit

List upcoming events on google calendar
Requires googlecl (http://code.google.com/p/googlecl/) Even better when you wrap this in a script and allow the --date=STRING to be $1. Then you can type: whatson "next Thursday" The date string for UNIX date is very flexible. You can also add --cal "[regex]" to the end for multiple calendars.

Advanced python tracing
Trace python statement execution and syscalls invoked during that simultaneously

raw MySQL output to use in pipes
-N removes header -s removes separator chars -r raw output After using these options, the MySQL ouptut can be used with pipes very easily

ping a host until it responds, then play a sound, then exit
This allows for sleeping in between pings. Also, espeak needs to be installed.

Transfer a file to multiple hosts over ssh
You can push files to up to 32 servers at once assuming ssh keys are in place. Great tool, it is part of the pssh suite.

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"


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