To allow a user to use sudo for a specific command without requiring a password, you can use the `visudo` command to edit the sudoers file. Here are the steps to do this for your example of allowing the user "josh" to use `systemctl start/stop/status` without a password:

1. Open a terminal and log in as the root user or a user with sudo privileges.

2. Type the following command to open the sudoers file in the terminal-based text editor nano:

```
sudo visudo -f /etc/sudoers.d/josh
```
This command will open a new sudoers file named "josh" in the `/etc/sudoers.d/` directory. This is the recommended way to add custom sudoers rules, as it keeps them separate from the main sudoers file.

3. In the nano editor, add the following line:

```
josh ALL=NOPASSWD:/usr/bin/systemctl start, /usr/bin/systemctl stop, /usr/bin/systemctl status
```
This line allows the user "josh" to run the `start`, `stop`, and `status` sub-commands of the `systemctl` command without being prompted for a password. The `NOPASSWD:` option specifies that no password is required.

4. Save the file by pressing `Ctrl+O` and then exit the editor by pressing `Ctrl+X`.

5. Verify that the syntax of the sudoers file is correct by running the following command:

```
sudo visudo -c -f /etc/sudoers.d/josh
```
If there are any syntax errors in the file, this command will report them.

Now the user "josh" can use `sudo systemctl start/stop/status` without being prompted for a password.
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