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clover/docs/en/cli.md
2020-05-07 19:43:25 +03:00

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# Command line interface
The Raspberry Pi OS, Raspbian, uses CLI as its primary user interface (which is common for Linux-based operating systems). You can use [a secure shell connection](ssh.md) to access the command line.
## Basic commands
> **Hint** Double-tapping the `Tab ↹` key autocompletes the command or its argument. This is known as "tab completion".
Show the contents of the current directory:
```bash
ls
```
Change current (working) directory:
```bash
cd catkin_ws/src/clover/clover/launch
```
Go one directory level up:
```bash
cd ..
```
Print path to the current directory:
```bash
pwd
```
Print contents of the `file.py` file:
```bash
cat file.py
```
Run `file.py` as a Python script:
```bash
python file.py
```
Reboot Raspberry Pi:
```bash
sudo reboot
```
You can terminate currently running (foreground) program by pressing `Ctrl`+`C`.
Read more about the Linux command line in the Raspberry Pi documentation: https://www.raspberrypi.org/documentation/linux/usage/commands.md.
## Editing files {#editing}
You can use **nano** to edit files on the Raspberry Pi. It is one of the more user-friendly console-based text editor.
1. Use the following command to edit or create a file:
```bash
nano path/to/file
```
For example:
```bash
nano ~/catkin_ws/src/clover/clover/launch/clover.launch
```
<img src="../assets/nano.png" alt="Editing files in nano" data-action="zoom">
2. Edit the file.
3. Press `Ctrl`+`X`, `Y`, `Enter` to save your file and exit.
4. Restart the `clover` service if you've changed .launch files:
```bash
sudo systemctl restart clover
```
You may also use other editors like **vim** if you prefer.