7. date instruction (key) indicates the operation time and date (read, set)
eg1: #date
eg2: #date +% F is equivalent to #date "+% Y-% m-% d"
eg3: #date "+% F% T" quotes indicate the date and hour, minute, let become an indivisible whole
It is equivalent to: #date "+% Y-% m-% d% H:% M:% S"
eg4: get some time before or after the (backup)
#date -d "-1day" "+%Y-%m-%d %H:%M:%S"
Or #date -d "-1year" ~~~~~~
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8. cal instruction: for operating the calendar
eg: #cal equivalent to #cal -1
Direct output of the current month's calendar
eg2: #cal -3
Show this month, last month, next month's calendar
eg3: #cal -y Year
The output of a calendar year
eg4: Calendar #cal -s display to Sunday as the first column
#Cal -m calendar display to Monday for the first column
9. clear or ctrl + L
Clear terminal existing orders and results
Note: not really clear, but the information is hidden in the top, can be viewed with the flow strip
10. Pipeline
Pipe character: |
Conduit may generally be used for filtering particular, expansion processing
Syntax: can not be used alone, in conjunction with the previous instruction requires, mainly supporting role
eg1:
Special Use Case: achieving the equivalent of less effect (understand)
Extended treatment:
