21 essential Linux test commonly used commands, every day a knock, knock three times each, monthly cycle, all can remember! !
https://www.cnblogs.com/poloyy/category/1672457.html
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less test.txt
ps see the process through and show less pagination
ps -ef | less
Shows the percentage of the current number of lines
less -m test.txt
Displays the current line number / percentage of total number of rows and
less -M test.txt
Empty display continuous line of conduct
less -s test.txt
Less operation mode after entering
g: to the first line
G: to the last line
u: move forward half a screen
d: half a screen moving forward
f: Specifies the number of lines or backward movement of a screen
b: Moves the specified number of rows or a screen forward
j: down a row
k: move up one line
q: End less mode