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 ...
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In bash script, if you wish to apply multiple conditions using if statement then use ‘ if elif else’. In this type of conditional statement, if the first condition is met then code below it will be executed otherwise next if condition will checked and if it is not matched then commands...
The if in a Bash script is a shell keyword that is used to test conditions based on the exit status of a test command. An exit status of zero, and only zero, is a success, i.e. a condition that is true. Any other exit status is a failure, i.e. a condition that is false. ...
Welcome to the Bash for Beginners Series where you will learn the basics of Bash scripting. In this video, Gwyn puts together several concepts we've covered in previous videos into one more complex and complete Bash script. We'll see how to use condition
You can have awhileloop to keep checking for that directory's existence and only write a message while the directory does not exist. If you want to do something more elaborate, you could create a script and show a more clear indication that the loop condition became true: ...
Writing a Bash Script To start with Bash scripting, create a new file using a text editor. If you're using Vim, run the following command: vim script.sh The extension for Bash scripts is .sh. However, the extension is not necessary. Adding the.shmakes the file easy to identify and ma...
In this tutorial, I explainhow to usefor,whileanduntilloops inbashshell scripts, and demonstrate their use cases using shell script examples. Loop Statements:forvs.whilevs.until Both theforandwhilestatements allow you to express a loop with a terminating condition (i.e., run the loop while ...
Related:How to Check If a File Exists in Linux Bash Scripts A Simple If Statement Example This is the canonical form of the simplestifstatement: if [ this-condition-is-true ] then execute-these-statements fi If the condition within the text resolves to true, the lines of script in thethe...
Another method we can use to grab the size of a file in a bash script is the wc command. The wc command returns the number of words, size, and the size of a file in bytes. Now: As you know, reading the file size in bytes is not very easy. To counter this, we can implement ...