Quotation on a Linux system can be a source of confusion at first. Single quotes ' and double quotes " are treated differently in Bash, and you will need to know the difference if you are writing a Bash script.
Programming & Scripting
Bash script: Unexpected end of file error
An Unexpected end of file error in a Bash script usually occurs when you there is a mismatched structure somewhere in the script.
Bash Script: Flags usage with arguments examples
If you have any experience on the Linux command line, then you should have run into command flags, which help us modify the behavior of a command that we are executing.
Bash script: Pause script before proceeding
Normally, a Bash script will execute each line of code the moment it reaches it, then immediately move on to the next. But it is also possible to add pauses to a Bash script in order to delay it or allow the user time to respond to a prompt, etc.
Bash script: YES/NO prompt example
Interactive Bash scripts will often include a yes or no prompt in order to ask for user verification before proceeding with a set of instructions or canceling the procedure.
Bash Scripting: Read input from command line
We can make a Bash script interactive by prompting a user for input. This can be done from the command line, with our script waiting for user input in order to proceed further.
Bash script: Shebang usage and best practices
If you have looked at some of our Bash script examples across our website, or seen some others online to learn from, you may have noticed that all of the Bash scripts begin with a shebang.
Bash script: String comparison examples
The need to compare strings in a Bash script is relatively common and can be used to check for certain conditions before proceeding on to the next part of a script.
How to exit from Bash script
If you are writing a Bash script or even just executing one, an essential thing you will need to know is how to exit from a Bash script.
Bash Scripting: Conditionals
A conditional in Bash scripting is made up of two things: a conditional statement and one or more conditional operators.
How to handle ACPI events on Linux
ACPI is the acronym for Advanced Configuration and Power Interface; as a standard, it was first implemented in the year 1996, as a successor to APM (Advanced Power Management). As a main feature, it brought the ability to handle power management at the operating system level, whereas before it was handled in BIOS. Some ACPI events on Linux are, by default, handled via systemd-logind, but more complex configurations can be achieved by installing and running the acpid service.
Bash script: Number of arguments passed to the script
In some Bash scripts, there is an option to pass arguments to the script when you are executing it. This allows the user to specify more information in the same command used to run the script.