The material here has been captured to work with the Raspberry Pi Rasbian distro
Change Raspberry Pi lost password
Follow these instructions – note you need access to a PC / MAC, with and SD card reader
http://playwithmyled.com/2012/10/change-raspberry-pi-lost-password/
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Listing running processes
top
The top program provides a dynamic real-time view of a running system. Type the ‘top’ at the command prompt. It also show CPU usage and other info
Stopping running processess
Use the ‘kill’ command
Syntax – ‘sudo kill xxxx’ where xxxx is the process PID number [left hand column when you run the ‘top’ command]. sudo is needed if program is has been run as root – ie anything using GPIO commands
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To find all the jpgs anywhere on the system
find / -name *.jpg
Find all the jpgs anywhere in the home directory and below
find /home -name *.jpg
If you are one of those people who sometimes uses capitals then use -iname
Find all the files owned by the user dms in /home and below
find /home -user dms
Find all the files modified more than 6 days ago
find / -mtime +6
[find can do a lot more – including running a command against each of these files]
The Meandering Pi and Friends 