# Bash Shell Script

You can upload and run a bash script in your Zuar Runner command jobs.

.. image:: assets/bash-shell-1.png

Bash, [the most commonly available unix
shell](https://tiswww.case.edu/php/chet/bash/bashtop.html), is
the shell, or command language interpreter, for the GNU operating system.

Bash commands can be saved in a file and executed as a script.

The following Bash script (`test_bash_script.sh`) creates a CSV file:
`written_by_bash.csv`

```bash
#!/usr/bin/env bash

echo "id, name" > /var/mitto/data/written_by_bash.csv
echo "1, Allen" >> /var/mitto/data/written_by_bash.csv
echo "2, Steve" >> /var/mitto/data/written_by_bash.csv
```

Upload the Bash script to Zuar Runner via the file manager (in the menu on the
left).

Then create a `cmd` job. 

.. image:: assets/bash-command-line__cmd_job.png

Give it a name, and use the command from above: `bash
/var/mitto/data/test_bash_script.sh`. Once the job is created, you can view
the JSON configuration by clicking the JSON tab in the job edit window. You
should see something like:

```json
{
	"cmd": "bash /var/mitto/data/test_bash_script.sh",
	"shell": true
}
``` 

Running the job should create a file that looks like this:

.. image:: assets/bash-command-line__output.png