-bash: service: command not found

The error message "-bash: service: command not found" means that the "service" command is not recognized by the shell. This command is used to control system services on Unix-based systems.

There are a few possible reasons why this command may not be working or recognized:

1. The service command may not be installed on your system.
2. The PATH environment variable may not be set correctly.
3. Your user account may not have sufficient permissions to run the service command.

To fix this error, you can try the following solutions:

1. Install the service command: Depending on your operating system, you may need to install a package that includes the service command. For example, on Ubuntu, you can run "sudo apt-get install sysvinit-utils" to install the package that includes the service command.

2. Set the PATH environment variable: The service command may not be in your PATH environment variable. You can check your PATH by running "echo $PATH". If the service command is not listed, you can add it to your PATH by running "export PATH=$PATH:/sbin:/usr/sbin".

3. Use sudo: If you are not running the command as a privileged user, you may need to use the sudo command to run the service command with elevated permissions. For example, "sudo service apache2 restart".