如果我们运行脚本并输入数字 129,那么它将执行 else 块,如下所示: If-else-statement-example-bash-script 使用if-else 比较字符串 #!/bin/bash string1=Debian string2=RHEL if [ "$string1" = "$string2" ]; then echo "The strings are equal." else
在 Shell 脚本中，if 语句后面加不加分号都是可以的。分号在 Shell 中是一种命令分隔符，它用于分隔...
shell脚本中字符串单引号和双引号的区别_fkuner的博客-CSDN博客 选项判断 [ -o OPTIONNAME ] 如果 shell选项 “OPTIONNAME” 开启则为真。 [ ARG1 OP ARG2 ] “OP” is one of -eq, -ne, -lt, -le, -gt or -ge. These arithmetic binary operators return true if “ARG1” is equal to, not e...
When trying to understand the working of a function like if-else in a shell script, it is good to start things simple. Here, we initialize two variables a and b, then use the if-else function to check if the two variables are equal. The bash script should look as follows for this t...
zutuanxue.com #Created Time: #Script Description: if [ $USER != 'root' ] then echo "ERROR: need to be root so that" exit 1 fi 三、if…else语句 适用范围==:两步判断,条件为真干什么,条件为假干什么。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 if [ condition ] then 条件为真...
如果if语句后放入一个不能工作的命令,则状态码为非0,且bash shell会跳过then后面的语句。 [22:43:53 root@libin3 libin]# vim shell21 /bin/bash #this is result error if libin then echo "this is error" fi if date then echo "this is success" ...
PowerShell $condition=$trueif($condition) {Write-Output"The condition was true"} if語句所做的第一件事就是計算括號中的運算式。 如果計算結果為$true,則會在大括號中執行scriptblock。 如果值是$false,則會略過該腳本區塊。 在上一個範例中,if語句只是評估$condition變數。 它是$true,並且會在腳本塊內...
PowerShell $condition=$trueif($condition) {Write-Output"The condition was true"} if语句执行的第一步是计算括号中的表达式。 如果计算结果为$true,则执行大括号中的scriptblock。 如果值为$false,则会跳过该脚本块。 在上面的示例中,if语句仅计算$condition变量。 其计算结果为$true,将在脚本块内执行Write-...
+ FullyQualifiedErrorId : PositionalParameterNotFound,Microsoft.PowerShell.Commands.NewItemPropertyCommand-PropertyType : The term '-PropertyType' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a...
The basic idea here is if $SUDO_USER is undefined then we know the script was run without sudo so we can expect it’s the root user. This would be the case where things are running in Docker, but of course it’s not limited to Docker. ...