Linux Common commands

.. /: Top level Directory | Cd..  Cut into/root's parent directory |  PWD: Judging the user's current directory | . /: Indicates the current directory

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Usage: Command 1 | Command 2 His function is to pass the result of the first command 1 execution as input of the order 2 to command 2.

http://blog.csdn.net/morning99/article/details/23753851

<

< is the meaning of the input redirection, which is to replace the file with the < followed by the keyboard as the new input device

Https://zhidao.baidu.com/question/340356072.html

&& | |

Way: Command1 && Command2

If the Command1 execution succeeds, the Command2 is executed

Http://www.cnblogs.com/dyx1024/archive/2012/09/16/2687644.html

||

Way: Command1 | | Command2

If Command1 execution fails, the Command2 is executed

Zip

Http://www.cnblogs.com/zdz8207/p/3765604.html

Mv

-R instructs MV to move all directories and subdirectories listed in the parameter recursively

Regular expressions

Http://www.cnblogs.com/Quincy/archive/2012/03/26/2418485.html

Linux Common commands