One of the most crucial pieces of any UNIX-like operating system is the init dæmon process. In Linux, this process is started by the kernel, and it's the first userspace process to spawn and the last ...

The Linux operating system is powerful and flexible, able to run in several different modes of operation called run levels. When a Linux system starts, a function called "init" is used to configure ...

One of the last things the Linux kernel does during system boot is mount the root filesystem. The Linux kernel dictates no filesystem structure, but user space applications expect to find files with ...

A vast majority of Linux systems these days are using systemd – a suite of programs aimed at managing and interconnecting different parts of the system. Systemd started replacing the init process back ...

Many modern operating systems are happy to display a "please wait" splash screen while booting--not so with Linux. Unlike other operating systems, Linux is incredibly chatty while it boots, and I'm ...

A daemon is a process that runs in the background and is waiting for a specific event to occur. Typical daemons are httpd of web server and sshd which provides SSH connection. When booting is ...

One of the files that the average Unix sysadmin rarely looks at, almost never changes and yet depends on every time he or she reboots a system is the /etc/inittab file. This modest little file ...

Supporting systemd required changes to the WSL architecture. As systemd requires PID 1, the WSL init process started within the Linux distribution becomes a child process of the systemd. Because the ...

The committee charged with solving technical disputes within the Debian project has finally completed a vote on what init system to use as the default in future Debian Linux distributions, selecting ...