Using Case statement in bash You can alsouse case statements in bashto replace multiple if statements as they are sometimes confusing and hard to read. The general syntax of a case construct is as follows: case
使用chmod +xtest.sh第三步：检测语法错误bash-x abc.sh第四步：执行./exampleshell脚本的执行通常有...
Bash supports if-else statements so that you can use logical reasoning in your shell scripts. The generic if-else syntax is like this: if [ expression ]; then ## execute this block if condition is true else go to next elif [ expression ]; then ## execute this block if condition is t...
在 bash shell 脚本中,If 语句可以以 If、If- else、If- If- else、netsted If 和 case 的形式使用。 If Statement Syntax: if [ condition_command ] then command1 command2 …….. last_command fi Bash 提供逻辑运算符来组合 if 语句中的多个条件,常见的逻辑运算符如下: -eq: 等于 -ne: 不等于 ...
在bash 脚本中,如果希望使用 if 语句应用多个条件,则使用 if elif else。在这种类型的条件语句中,如果满足第一个条件,则执行下面的代码,否则检查下一个 if 条件,如果不匹配,则执行下面的 else 语句中提到的命令。其语法和示例如下所示。 Syntax :
syntax error near unexpected token fi 等都是这样引起的. 5 if 后面一定要跟上 then. 同理 elif 后面一定要跟上 then. 不然提示出错信息: syntax error near unexpected token else top BASH IF http://lhsblog01.blog.163.com/blog/static/10200451920081118105937818/ ...
#!/bin/bashcase$1in"hello")echo"Hello, I am fine,thank you!";;"")echo"你必须要输入一个...
我的命令for i in `ls`; do if (( $i < 1011 )) then echo rm $i -rf; done Run Code Online (Sandbox Code Playgroud) 但我得到了错误-su: syntax error near unexpected token `then' Run Code Online (Sandbox Code Playgroud) 有人能指出我正确的方向吗?And...
'Else if'in bash scripting, often written as'elif', is used to check multiple conditions in your code. It is used with the syntax,if [firstStatement]; then... elif [secondCondition]; then... else. It’s a powerful tool that allows your scripts to make decisions based on various scen...
4. Bash If..then..else..if..then..fi..fi.. If [ conditional expression1 ] then statement1 statement2 . else if [ conditional expression2 ] then statement3 . fi fi If statement and else statement could be nested in bash. The keyword “fi” indicates the end of the inner if stateme...