Most of the software packages running on GNU/Linux distributions are not by default available in the pre-configured repositories. For developers, these software packages are usually compiled and installed. Quite often these source-compiled software requires a daemon to be run inorder to have the correct execution of the software. The service command in fedora can be used to invoke those background process. Installation from source may or may not contain the initialization scripts to start the particular service. In such situations you could write your own init scripts for launching the daemons using the service command. Let’s start with the basics now.

Run levels
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