How To Install daemonize on AlmaLinux 8
Introduction
In this tutorial we learn how to install daemonize on AlmaLinux 8.
What is daemonize
daemonize runs a command as a Unix daemon. As defined in W. Richard Stevens’ 1990 book, Unix Network Programming (Addison-Wesley, 1990), a daemon is “a process that executes ‘in the background’ (i.e., without an associated terminal or login shell) either waiting for some event to occur, or waiting to perform some specified task on a periodic basis.” Upon startup, a typical daemon program will - Close all open file descriptors (especially standard input, standard output and standard error) - Change its working directory to the root filesystem, to ensure that it doesn’t tie up another filesystem and prevent it from being unmounted - Reset its umask value - Run in the background (i.e., fork) - Disassociate from its process group (usually a shell), to insulate itself from signals (such as HUP) sent to the process group - Ignore all terminal I/O signals - Disassociate from the control terminal (and take steps not to reacquire one) - Handle any SIGCLD signals Most programs that are designed to be run as daemons do that work for themselves. However, you’ll occasionally run across one that does not. When you must run a daemon program that does not properly make itself into a true Unix daemon, you can use daemonize to force it to run as a true daemon.
We can use yum or dnf to install daemonize on AlmaLinux 8. In this tutorial we discuss both methods but you only need to choose one of method to install daemonize.
Install daemonize on AlmaLinux 8 Using dnf
Update yum database with dnf using the following command.
sudo dnf makecache --refresh
After updating yum database, We can install daemonize using dnf by running the following command:
sudo dnf -y install daemonize
Install daemonize on AlmaLinux 8 Using yum
Update yum database with yum using the following command.
sudo yum makecache --refresh
After updating yum database, We can install daemonize using yum by running the following command:
sudo yum -y install daemonize
How To Uninstall daemonize on AlmaLinux 8
To uninstall only the daemonize package we can use the following command:
sudo dnf remove daemonize
References
Summary
In this tutorial we learn how to install daemonize on AlmaLinux 8 using yum and dnf.