Linux Bash If Example

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Linux Bash If Example

In order to execute a Bash if else statement you have to use four different keywords if then else and fi if represents the condition that you want to check then if the previous condition is true then execute a specific command else if the previous condition is false then execute another command How to edit files in linux using a shell script systran box. Bash if else statement bytexdHow to use bash operator in linux.

Bash Scripting Nested If Statement Linux Tutorials Learn Linux Configuration

Thing 3 Compound commands Remember that each Bash compound command starts and ends with some reserved words if and fi in this case Thing 4 True means zero In Bash True means a return status of zero while False means a return status different from zero Thing 5 We can only have one if statement Bash if statements are very useful. In this section of our Bash Scripting Tutorial you will learn the ways you may use if statements in your Bash scripts to help automate tasks. If statements (and, closely related, case statements) allow us to make decisions in our Bash scripts.

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Linux Bash If ExampleBash if conditionals can have different forms. The most basic if statement takes the following form: if TEST-COMMAND then STATEMENTS fi The if statement starts with the if keyword followed by the conditional expression and the then keyword. The statement ends with the fi keyword. If the TEST-COMMAND evaluates to True, the STATEMENTS gets executed. Using if else statement in bash You may have noticed that you don t get any output when you run the root sh script 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 are root else echo You are not root fi

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