logic symbols meaning

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

I. wildcard characters * Represents any character ranging from 0 to infinite. Example: Find the file name starting with cron under/etc/ [Root @ instructor Desktop] # ls/etc/cron * /Etc/cron. deny/etc/crontab /Etc/cron. d: 0 hourly raid-check

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

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

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

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

Linux special symbols Common special symbols in shell are listed as follows:#;.,/\ 'String' |! $ {}$? $ * "String "***? : ^ $ # $ @ 'COMMAND '{} [] [[] () | & {xx, yy, zz ,...}~ ~ + ~ -& \ +-% =! =   # Comments)This is almost a full-market symbol,

Linux special symbols Common special symbols in shell are listed as follows: #;.,/\ 'String' |! $ {}$? $ * "String "***? : ^ $ # $ @ 'COMMAND '{} [] [[] () | & {XX, YY, ZZ ,...}~ ~ + ~ -& \ +-% =! =   # Comments)This is almost a full-market symbol,

http://blog.chinaunix.net/u1/53027/showart.php?id=482234The special symbols commonly used in the shell are listed below:#;    ;;        .      ,         /        \         ' String ' |        !    $    ${}     $?       $$    $*          "string" *   

There are a lot of special symbols in the Linux shell, which we should pay special attention to when we write shell scripts: On the one hand, we need to know the use of these special symbols, which can achieve a multiplier effect, but on the other