1. /usr : Installed software, shared libraries, include files, and static read-only program data. in this main directories some sub-directories included.
1.1 : /usr/bin : User commands
1.2 : /usr/sbin : System Administration Commands.
1.3 : /usr/local : Locally Customized Software
2. /etc : Configuration files specific to this system.
3. /var : Variable data specific to this system that should persist between boots. Files that dynamically change such as database, cache directories, log files, printer-spooled documents and website content may be found under this directory.
4. /tmp : A world-writable space for temporary files. Files which nave not been accessed, modified of changed for 10 days are deleted from this directory automatically. There is another temporary directory exist, /var/tmp, in which files that have not been accessed, changed, of modified in more than 30 days are deleted automatically.
5. /dev : Contains special device files which are used by the system to accessed hardware.
6. /boot : Files needed in order to start the boot process.
7. /root : This is home directory for the administrative superuser, root.
8. /home : Home directives where regular users store their personal data and configuration files.
9. /run : Runtime data for processes started since the last boot. This include process ID files and lock files, among other things. The content of this directory are recreated on reboot.
System Administrator must know location of file to execute accurate command on command prompt.
1.1 : /usr/bin : User commands
1.2 : /usr/sbin : System Administration Commands.
1.3 : /usr/local : Locally Customized Software
2. /etc : Configuration files specific to this system.
3. /var : Variable data specific to this system that should persist between boots. Files that dynamically change such as database, cache directories, log files, printer-spooled documents and website content may be found under this directory.
4. /tmp : A world-writable space for temporary files. Files which nave not been accessed, modified of changed for 10 days are deleted from this directory automatically. There is another temporary directory exist, /var/tmp, in which files that have not been accessed, changed, of modified in more than 30 days are deleted automatically.
5. /dev : Contains special device files which are used by the system to accessed hardware.
6. /boot : Files needed in order to start the boot process.
7. /root : This is home directory for the administrative superuser, root.
8. /home : Home directives where regular users store their personal data and configuration files.
9. /run : Runtime data for processes started since the last boot. This include process ID files and lock files, among other things. The content of this directory are recreated on reboot.
System Administrator must know location of file to execute accurate command on command prompt.
Directory Purpose
This directory contains static, persistent system configuration data. :- /etc
Contains installed software programs and libraries : - /usr
Temporary files are stored here : - /tmp
System administration binaries, for root use are here : - /usr/sbin
This is the root account's home directory :- /root
This is the system's root directory :- /
User home directory are located here:- /home
This directory contains dynamic configuration data, such as FTP and websites :- /var
System administration binaries, for root use, are here :- /usr/sbin
Regular user commands and utilities are located here :- /usr/bin
