Conditions in bash scripting (if statements) - Linux Academy Blog https://linuxacademy.com/blog/linux/conditions-in-bash-scripting-if-statements/ Table of conditions The following table list the condition possibilities for both the single- and the double-bracket syntax. Save a single exception, th...
If-statement-Bash-Script-Example if-else Statement 除了普通的 if 语句之外,我们还可以用 else 块扩展 if 语句。基本思想是,如果语句为真,则执行 if 块。如果语句为假,则执行 else 块。 Syntax : if [ condition_command ] then command1 command2 …….. last_command else command1 command2 …….. ...
You may have noticed that you don’t get any output when you run theroot.shscript as a regular user. Any code you want to run when an if condition is evaluated to false can be included in an else statement as follows: #!/bin/bash if [ $(whoami) = 'root' ]; then echo "You a...
1.1 if格式 if condition; then commands; fi 1.2 else if 和 else if condition; then...
linux 当if中的条件表达式是bash脚本中的命令时，它意味着什么？`then COMMANDS' list is executed and...
1. How to use in if condition in shell script? To use an if condition in a shell script, you can follow the basic syntax of an if statement. Here’s an example: if[condition];then# code to execute if condition is truefi For example, to check if a file exists: ...
Bash Bash Condition Bash 编程简介 编写Bash 脚本 Bash 脚本中的条件语句 本编程教程将讨论 bash 中的条件结构,尤其是具有单个和多个条件的 if 条件。 Bash 编程简介 Bash 是 UNIX 和 Linux 操作系统中的一个简单的命令行解释器。这个解释器允许我们使用命令行运行一些命令,这些命令可以通过在一个称为脚本的...
ifCONDITION; then if-true fi CONDITION:可以是测试条件,可以是命令执行结果,如果CONDITION内容为真,则进入then阶段,之后进行相应操作,这个执行操作可以是命令,也可以是其他执行语句。也就是这里可以进行语句的嵌套。 该操作结束后,使用fi进行if语句的结尾动作。
1. How to use in if condition in shell script? To use an if condition in a shell script, you can follow the basic syntax of an if statement. Here’s an example: if[condition];then# code to execute if condition is truefi Copy ...
Bash Copy In this example, we have two variables, ‘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, ...