cd / # change current directory to top-most directory
pwd # display current path
cd /home # change directory using absolute path
pwd # display current path
mkdir /home/joe
cd joe # change directory using relative path
pwd # display current path
mkdir /home/jane
cd ../jane # change directory using relative path
pwd # display current path
# display the size of the disk drive and amount of used and
# available space using abbreviations such as Gi for Gigabyte
df -h ~/
du -sh ~/
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX