From the course: Advanced Linux: The Linux Kernel

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Configuring and using systemd services

Configuring and using systemd services - CentOS Tutorial

From the course: Advanced Linux: The Linux Kernel

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Configuring and using systemd services

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- [Instructor] Let's talk more about booting, in particular process number one. And startup services. Remember when your system boots up, it's going to normally use a file system start with that's in RAM. And Linux always needs a root file system so that root file system might be in RAM or might be in on a disk. By definition the root file system has the file system that includes the directory slash. So we often call this initial file system image that we have initrd, which got its name from an init RAM disk. Although typically these days it's not a RAM disk it's a RAM file system. A RAM disk was a formatted file with an ordinary file system like say, EXE2 the RAM file system is not like that instead it's its own kind of filesystem and it's a RAM file system that can grow and shrink for example. Inside this filesystem, inside a Root file system you're going to have a program that the kernel is going to run first.…

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