Shell script
Definition
A shell script is a file containing commands that a command-line shell can run. Shell scripts are often used to automate setup, file operations, deployments, and local development tasks.
Why it matters
Shell scripts can turn several manual terminal steps into one repeatable command. They are powerful, so they should be read carefully before running, especially when they change files or production data.
Example in VCA
In VCA, a learner might use a shell script to run project checks or prepare a local development environment.
Another Real World Example
A server administrator might use a shell script to back up files, rotate logs, or restart a service.
Common mistakes
- Running a shell script without understanding destructive commands.
- Assuming Bash scripts work the same way in PowerShell.
- Forgetting to make a script executable when required.
- Hardcoding paths that only work on one machine.
- Not stopping the script when an important command fails.