mount usb drive

sudo lshw 
sudo mkdir /media/usbdrive
sudo mount -t vfat /dev/sdb1 /media/usbdrive

enable/config ssh:

sudo apt-get install openssh-server
sudo service ssh status # check its running

sudo nano /etc/ssh/sshd_config ## edit config
sudo service ssh restart

updating system:

sudo apt update
sudo apt dist-upgrade

downloads:

wget --referer=http://foo.com https://foo.com/file.tar

extracting:

# .bz2
tar -vxjf file.tar.bz2
# .xz
tar -Jxvf file.tar.xz

sensors

disk usage

## show drives
df -h
## show largest dirs
du -sh ~/* | sort -n
# or over 500,000
du -k ~/* | awk '$1 > 500000'

PCI devices:

lspci

OpenCL devices

clinfo

Users/Groups:

sudo usermod -a -G video $LOGNAME