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: #!/bin/bashwhile[!-ddirectory_expected]doecho"`date`- Still waiting"sl
In this example, we’ve created a ‘for’ loop that acts as a ‘foreach’ loop. The loop iterates over the numbers 1 through 5, echoing each number on a new line. This is a basic way to use the ‘foreach’ loop in Bash, but there’s much more to learn about looping and itera...
The while loop is another popular and intuitive loop you can use in bash scripts. The general syntax for abash while loopis as follows: while [ condition ]; do [COMMANDS] done For example, the following3x10.shscript uses a while loop that will print the first ten multiples of the number...
Let's see another example that displays all the contents of anarray in bash: #!/bin/bash distros=(Ubuntu Fedora Debian Alpine) for i in "${distros[@]}"; do echo $i done If you run the script, it will display all the distros defined in the array: Ubuntu Fedora Debian Alpine While...
Iterate the Script Using the Three-Expression “For” LoopThe three-expression “for” loop is the conventional way of using “for” loop for any programming language. The following script shows the use of the three-expression “for” loop in Bash to print the values of an array....
After about 17 seconds we interrupt our script by using CTRL+c, which is the universal method to stop a running process in Bash (besides the stronger and more effective CTRL+z which pauses a process immediately, but that is for another article!) ...
Loops are an important building block in a shell script which allows to iterate over a section of code. The bash loop constructs include the for loop, while loop, and until loop. 👉 Sometimes, you may find references to a select loop in bash. It is not part of the bash loop ...
In a shell script, aforloop allows you to iterate over a set of values or a range of numbers. Here are a few examples of how to useforloops in different contexts: Example 1: Iterating Over a List of Values #!/bin/bash # List of values ...
fruit=orange; and on the third and final iteration,fruit=pear. Once it has completed the loop, the script continues normal execution with the next command after thedonestatement. In this case, it ends by saying “Let’s make a salad!” to show that it has ended the loop, but not the...
Now that we have our “for” loop created in our Bash script, save and exit the file. We must first add the executable permission to execute the script. sudochmod+x<filename.sh> Next, execute the script as shown in the following. Watch how we get the Bash “for” loop iterating the...