Statement(s) to be executed if expression is not true fi如果 expression 返回 true,那么 then 后边的语句将会被执行;否则,执行 else 后边的语句。 3) if ... elif ... fi 语句 if ... elif ... fi 语句可以对多个条件进行判断,语法为: Shell case esac语句 case ... esac 与其他语言中的 switc...
#while command#do#Statement(s) to be executed if command is true#doneCOUNTER=0while[$COUNTER-lt5]doCOUNTER=`expr$COUNTER+ 1` echo$COUNTERdone #003-until循环 #until command#do#Statement(s) to be executed until command is true#donea=0until[ !$a-lt10]doecho$aa=`expr$a+ 1` done #0...
一般来说,使用『 case $变量 in 』这个语法中,当中的那个『 $变量 』大致有两种取得的方式: 直接下达式:例如上面提到的,利用『 script.sh variable 』的方式来直接给予 $1 这个变量的内容,这也是在 /etc/init.d 目录下大多数程序的设计方式。 互动式:透过 read 这个命令来让使用者输入变量的内容。 这么说...
模式1) command ;; 模式2) command ;; *) command ;; esac``` 每一模式必须以右括号结束,取值可以是变量或者常数,所有命令开始执行至;; 如果无一匹配则使用星号捕获该值,再执行后面的命令 #!/bin/bash #Author: Kevin #Description: It is a script about the case ... esac statement echo "Input a...
My minimalistic algorithm here takes the Physical memory on the node, and it goes through a blind Case statement which states that if 4GB, leave 1GB for the OS, if 8GB, leave 2 GB for the OS, if 16GB, leave 3GB for the OS, if...
The if-else in shell script is a valuable tool for shell programmers. It is used to choose a particular code block based on how the conditional statement evaluates. The processor selects one of the available blocks based on the outcome of processing predefined conditions. ...
So even if the user wants to manually initiate a startup using the service script, that startup must be done through a request to the SCM. In this case, the sequence of operations is: The user (an administrator) runs a first instance: PSService.ps1 -Start. This first...
‘a’ and ‘b’. The script checks if ‘a’ is equal to ‘b’. If it’s not, it moves on to the ‘elif’ statement to check if ‘a’ is greater than ‘b’. If neither condition is met, it executes the ‘else’ statement, which in this case, prints ‘a is less than b’...
if[expression]thenStatement(s)to be executedifexpression istruefi 注意:expression 和方括号([ ])之间必须有空格,否则会有语法错误。 if…else也可以写成一行,以命令的方式来运行,像这样: 代码语言:javascript 复制 iftest $[2*3]-eq $[1+5];then echo'The two numbers are equal!';fi; ...
Compare two mailbox users directly in compare-object scriptblock compare two strings in if-then-else statement Compare two text files in Powershell and if a name is found in both files output content from file 2 to a 3rd text file Compare-Object : Cannot bind argument to parameter 'Referenc...