Things I always forget

To edit the main menu in Ubuntu:

sudo apt-get install alacarte

To read large SD cards install exfat and utils

sudo apt-get install exfat-fuse exfat-utils

Access /dev/ttyUSB

sudo usermod -a -G dialout $USER

or

sudo adduser $USER dialout

sudo reboot

To run crontab every 5th minute:

*/5 * * * * <command>

RAR and UNRAR

sudo apt-get install rar unrar

unrar x -e file.part1.rar

This will start the extraction process, and make all those partxx.rar files into one big file.

List lot of USB info

lsusb -v