Multi-user
& Multi-process
Many
people can use one machine at the same time.
File
& Process
Data,
directory, process, hard disk etc
(almost everything) are expressed as a file.
Process
is an running program identified by a unique id (PID).
Important
Directories
/bin This contains files that are essential for
correct operation of the system. These are available for use by all users.
/home
This is where user home directories are stored.
/var This directory is used to store files which
change frequently, and must be available to be written to.
etc Various
system configuration files are stored here.
Commands
su switch user
passwd change password
useradd create new user account
userdel delete user account
mount mount file system
HI MR HAIDAR CONGRATULATION
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