How to use the date command under LINUX __linux

How to use the date command under Linux
in Linux, the date command is a very common command that we often need to use to view system time, set system time, and so on.
1. Set the system time directly using the date command such as: Set the system time is October 1, 2015 12:30 18 seconds # date 100112302015.18 or # date-s "2015-10-01 12:30:18"
2. Date commands that are commonly used in scripts Show Current year date +%y Displays the current month date +%m shows which day the date +%d Displays the current month and day format date +%y%m%d date +%y/%m%d ....
3, date-d parameter in scripting, date-d is very useful if the day before is displayed date-d ' 1 days ago ' or date-d yesterday +%y%m%d Tomorrow's date date-d next-day +%y%m%d Next Monday time date-d ' next Monday '