What are all Linux Folders and its details/usage ?

1) /  (slash)   :-  

*  / is called as  root /super user .

*   It  is  parent directory for all other directories.

*  It is called as ROOT directory.

*  It is represented by forward slash(/).

2)   /root  :-

 *  /root is home directory for root user(super user)

 * It provides working environment for root user

3) /boot  :-

* /boot contains bootable files Like Grub.conf .

 4)  /usr  :-  

*  By default system software’s are installed in /usr directory.

5) /sbin  :-

* /sbin contains commands used by only Super User(root)

 

6)  /bin  :-            

* /bin contains commands used by all users and binary files.

          

7) /home :-

*  It is home directory for all local  users.

* It provides working environment for other users (other than root).

8)  /etc  :-       

* /etc contains all configuration files like 

       > /etc/passwd for all local users details               

       > /etc/sysconfig/network        uses for network file .

                 

9) /opt :-      

 * /opt is optional directory for /usr/local.

 * It contains all third party softwares.

           

10) /var :-

* /var is containing variable data like mails, log files.

           

11) /mnt  :-

* /mnt is default mount point for any partition.

* It is empty by default.

* It contains all of removable media like cdrom, pen drive

     

12)  /proc  :-

*  /proc contains all the  process files

* This folder contents are not permanent, they keep change.

* It's file contain useful information used by OS like,

         > /proc/meminfo    To check system memory details.

         >/proc/cpuinfo     To check system cpu details.

           

         

13) /dev :-

* /dev contains device files like 

       /dev/hda           for harddisk

       /dev/cdrom       for cdrom

          

14) /lib  :-       

* /lib contains library files which are used by OS.

* library files in linux are shared object files .           

15) /tmp :-

* /tmp contains all the temp files.