This lesson will cover Bash scripting in the bash shell. The Bash shell is the standard for Linux operating systems. Sample scripts are provided;...
Example 2: Check if strings are not equal in Bash Instead of checking the quality, let’s do the opposite and check the inequality. Bash also provides the negation operator so that you can easily use “if not equal” condition in shell scripts. if [ "$string1" != "Not MyString" ] ...
kabary@handbook:~$ crontab -e 0 */6 * * * /home/kabary/scripts/disk_space.sh You may practice some more by trying to solve the problems presented in the workbook below. And yes, they include the answers as well. Bash Chapter 10 Practice Questions Problems and their solution to practice...
Example 5: If statement in bash with logical OR operator Logical OR in bash scripts is written with double vertical bars ||. Let’s try the previous example again with a slight variation to test out an example of the logical OR operator: #!/bin/bash read -p "Enter a number: " USER...
These exercises are to test your general understanding of the shell scripting. My advise is first try to write this shell script yourself so that you understand how to put the concepts to work in real life scripts. For sample answer to exercise you can refer the shell script file supplied ...
Example 3: Run the “sleep” Command through Bash Shell Scripts Thesleepcommand is mainly used inshell scripts. Programmers use this command with other commands while writing codes toset a delaybetween them and then execute the script. You can write thesleepcommand in theshell scriptand thenexec...
you should always quote the bash variables when you are referring it. There are few exceptions to this best practice rule. This is one of them. If you double quote the variable in this for loop, the list of values will be treated as single value. Lot of people fall into this trap. ...
Docker Mod Simple - just add scripts In this repository you will find theDockerfilecontaining: FROMscratch#copy local filesCOPYroot/ / For most users this will suffice and anything in the root/ folder of the repository will be added to the end users Docker container / path. ...
Error Cascades:A single cron job’s failure might trigger a chain reaction of issues across the system, affecting other interconnected processes. Testing cron jobs isn’t merely a routine procedure; it’s a foundational practice that ensures a system’s reliability, functionality, and health. ...
Scripts can have no Shebang bash. Any such script will be parsed using the default interpreter. For example, bash is the default interpreter for bash and sh for zsh. While most of the UNIX/Linux systems have bash as the default, users have options to use others. In such a scenario, wi...