In Linux, you can run a command on startup by adding it to the system startup scripts or by using the crontab. Here are the steps to do it:

1. System Startup Scripts: 

In most Linux distributions, the system startup scripts are stored in the `/etc/rc.d` directory. You can add your command to one of these scripts so that it runs on startup. For example, to add a command to run on startup, you can use the following command:

```
sudo nano /etc/rc.d/rc.local
```

Then, add your command to the file, save, and exit.

2. Using Crontab: 

You can also use the crontab to run a command on startup. To do this, open the crontab editor by typing the following command:

```
crontab -e
```

Then, add the following line to the end of the file:

```
@reboot /path/to/your/command
```

Save and exit the file. Now, your command will run on startup. 

Note: Make sure to replace `/path/to/your/command` with the actual path to your command.
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