inverted slash

The shell can recognize 4 different types of caret symbols: single quote character ' double quote character ' backslash character \ Inverted quote character ' 1. Single quotation mark (') # grep Susan Phonebook Susan Goldberg 403-212-4921 Susan

1. Single quotation mark (') # grep Susan Phonebook Susan Goldberg 403-212-4921 Susan Topple 212-234-2343 If we're looking for Susan Goldberg and can't use the grep Susan Goldberg Phonebook command directly, grep treats Goldberg and phonebook as

# Well No. (comments)#管理员 $ ordinary User In the script #!/bin/bash #!/bin/sh Typically appear in the first line of the shell script, meaning to use/bin/bash to execute the current shell script, except for the first line, which plays the role of

Command lineWhen users log on to the Linux system, they can see a shell prompt that identifies the start of the command line. The user can enter any commands and parameters after the prompt. For example: 　　 $ date 　　 211 01:34:58 CST 1999 　　 $ 　　

It is customary to use the Linux command line to manage Linux systems, for example: Copy Code code as follows: $ date 211 01:34:58 CST 1999 $ When the user logs in, it actually goes into the shell, and it follows a certain

The special symbols commonly used in the shell are listed below:# ; ;; .   ,/\ \ ' String ' |! $   ${}   $? $$   $*\ "string\" * * *? : ^ $# [email protected] ' command ' {} [] [[]] () (())|| && {Xx,yy,zz,...} ~ ~+ ~-& \\ +-%= = = =# pound (comments)

The quickest way to learn to write script is to watch someone else's script file. However, although this method is practical, it is often "less effective" or even halfway to the shell's basic cognitive deficit. The first problem is that you don't

The case statement is suitable for applications that require multiple branching. The case Branch statement is formatted as follows: Case $ variable name inMode 1)Command sequence 1;;Mode 2)Command Sequence 2       ;;*)Sequence of commands executed

Linux Special symbols encyclopedia The special symbols commonly used in the shell are listed below:#   ;      ;;      .       ,/\ ' String ' |   !      $   ${}   $?   $$ $* "String" * * *?   : ^ $# [email protected] ' command ' {} [] [[]] () (()) | |

Source: http://blog.sina.com.cn/s/blog_62a151be0100x9rn.htmlFourth chapter basic Skills-Special symbolsThe quickest way to learn to write script is to watch someone else's script file. However, although this method is practical, it is often "less