Linux Rookie Road [4]-cal,date,bc,echo $LANG, man

Since the first four days have been looking at Bird's Linux books computer some basic knowledge, today only touch the basic commands, from today on a daily record of their own Linux learning process.

Cal: Calendar

Cal

Cal 2015: List all calendars for 2015

Cal 5 2015: List calendar for May 2015

Date: Day

Date: Displays the current date

BC: Calculators

BC: Count into Calculator function

echo $LANG: Displays the display language supported by the current terminal

Example

Change current LANG:LANG=ZH_CN. UTF-8

Man: Help command

Example:man ls

Linux Rookie Road [4]-cal,date,bc,echo $LANG, man