Date Time Management
cal [ [month] year]- print the calender of the giver year and monthdate- displays current date- 
date +[symbol]- display the current date particular part given by the symbol[d - day] [y - year] [H,M,S - hour, minute, second] [D - date] [T - time] - 
timedatectl list-timezones- list time zones sudo timedatectl set-timezone Australia/Sydneyselect a time zone