# Use command line to override parameters in the job script

The command line parameters takes precedence of those in the job script.

## Example 1

Consider the job script `run1.sh`:
```bash
#!/bin/bash
#$ -pwd
#$ -l h_data=2G,h_rt=1:00:00

echo 'hello world'
```

Submission command:
```bash
qsub -l h_data=4G run1.sh
```
results in a job request of:

- `h_data=4G`  (from command line, overriding the `h_data` value in the job script)
- `h_rt=1:00:00` (from the job script)


## Example 2


Consider the job script `run2.sh`:
```bash
#!/bin/bash
#$ -pwd
#$ -l h_data=2G,h_rt=1:00:00

echo 'hello world'
```

Submission command:
```
qsub -l exclusive,h_rt=2:00:00 run2.sh
```
results in a job request of:

- `-l exclusive`: from command line (new)
- `h_data=2G`: from job script
- `h_rt=2:00:00`: from command line (overriding the `h_rt` value in the job script)