# Linux operating System

Open Source: Software and Source code available to all the users.

**Why Linux Operating System is used**?

1. it is open source.
    
2. it has huge community support.
    
3. Most Servers run on Linux
    
4. Automation
    
5. Secure
    

**<mark>Some Important Linux Directories</mark>**

.Home Directories: **/root,/home/username**

.User Executables: **/bin, /usr/bin, /usr/local/bin**

.System Executables: **/sbin, /usr/sbin, /usr/local/sbin**

.Other Mountpoints: **/media, /mnt**

.Configuration files: **/etc**

.Temporary files: **/tmp**

.kernels and bootloader: **/boot**

.Server data: **/srv,/var**

.System Information: **/proc, /sys**

.Shared libraries:**/lib, /usr/lib, /usr/local/lib**

**<mark>Different Linux Distribution</mark>**

Popular Desktop linux OS

.Ubuntu linux

.Suse

.Arch linux

.Debian

.Fedora

.Linux Mint