bootloader-
-how the computer know the location of the OS
-the BIOS knows which device is used for for booting
-the BIOS runs the bootloader
UEFI boot loading
-unfied extensible firmware interface
the kernal
-the core of the operating system
-manages application execution
-kernal upgrades
systemD a system and service manager
-a system and service manager
-starts,, stops and manages daemons
daemons are background systems
root acount
the Linux root username
-similar to windows admin
configuration Linux can be managed at the command line
/etc/passwd
- a list of registered users
the fie format
username
password
user id
group id
user id
home directory
command or shell
etc/shadow
all of your account passwords
-a text file
/etc/hosts
-resolve an IP address from a fqdn
kinda like DNS before DNS
/etc/resolv.conf
-dns is important
we can’t remember every IP
