A 'for loop' is a bash programming language statement which allows code to be repeatedly executed. A for loop is classified as an iteration statement i.e. it is the repetition of a process within a bash script. Tutorial details For example, you can run UNIX command or task 5 times or ...
Example 5 : For loop using File Names in Command Substitution to Specify Arguments Some commands provide file names and directory names as their output. In the following example, the shell substitutes the output of the command, ls /etc/p*(/etc/passwd/etc/profileand so on), as the argument...
The output for the for loop with command substitution as demonstrated in the above example would be: Bash For Loop: C Style Syntax The C style syntax suits users who are more accustomed to the for loop syntax in other languages like C, C++, Java, JavaScript, etc. Here is the basic synt...
Example-1: Reading static values Create a bash file namedloop1.shwith the following script to read the values from a list using for loop. In this example, 5 static values are declared in the lists. This loop will iterate 5 times, and each time, it will receive a value from the lists...
2. Variable for the list after “in” keyword Instead of providing the values directly in the for loop, you can store the values in a variable, and use the variable in the for loop after the “in” keyword, as shown in the following example. $ cat for2.sh i=1 weekdays="Mon Tue ...
The range syntax also works for letters. For example: #!/bin/bash # For loop with letter range for i in {a..f} do echo "Element $i" done The script outputs letters to the console in ascending order in the provided range. The range syntax works for elements in descending order if ...
Bash For Loop Example Bash For Loop with Ranges In the previous examples, we explicitly listed the values to be iterated by thefor loop, which works just fine. However, you can only imagine how cumbersome and time-consuming a task it would be if you were to iterate over, for example, ...
Example 01: Simple For Loop Within the terminal shell, we will be creating a new Bash file named “bash.sh” with the “touch” instruction. This file will be created in our system’s home directory. This file needs to be opened in some editor i.e., nano, vim, or text to add cod...
If you want to sync time in multiple servers using bash for loop in Linux then you can use below loop. In this example, we have provided the IP of all Servers in server.txt and then going to every server using for loop and setting the time to 16:08:00 using date command as shown...
this method. You should not include the keyword “in” in the for loop. If you leave the keyword “in” without any values, it will not use the positional parameter as shown below. It will not go inside the loop. i.e for loop will never get executed as shown in the example below....