1. Bash If..then..fi statement if [ conditional expression ] then statement1 statement2 . fi This if statement is also called as simple if statement. If the given conditional expression is true, it enters and e
But, with Bash If-else, there are two statements specified within the bash scripts for one condition. If the condition is true, then the first statement will be executed, but if the condition is false, then the second statement will be executed. Hence, now you know that the Bash ...
'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...
https://www.cnblogs.com/ggjucheng/archive/2013/01/13/2858470.html https://ryanstutorials.net/bash-scripting-tutorial/bash-if-statements.php https://stackoverflow.com/questions/4277665/how-do-i-compare-two-string-variables-in-an-if-statement-in-bash http://www.masteringunixshell.net/qa36/bash...
If a statement is proven to be true, then a condition would run. This functionality enables us to determine the circumstances under which a certain piece of code shall be executed. In bash, we start the conditional with an if statement and end it with fi (if spelled backward). Here is...
Bash Scripting Tutorial Guide linuxconfig.org $ 1. 2. 3. 4. 5. 6. 7. 8. 9. 9. Bash if / else / fi statements 9.1. Simple Bash if/else statement Please note the spacing inside the [ and ] brackets! Without the spaces, it won't work!
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it contains a string of zero length. There are many options in Bash to do this task. Using the “-z” option with the “if” statement is one of the ways to check whether a variable is empty or not. The uses of the “if -z” option are shown in the next part of the tutorial...
Theifstatement checks if theUSERenvironment variable is equal toroot. Thethenblock runs if the condition is true, and theelseblock runs if it’s false. Step 3: Loops in Bash Bash also supports loops, which are essential when you want to repeat a task multiple times. For example, here’...
Executed command status. If a command matches the input variable to a pattern, the exit status of the executed command is returned. Note:If you are new to Bash, read our tutorial onBash functions. Bash case Statement Examples The sections below show practical examples of using the Bashcasest...