Linux organizes files into directories by purpose. Understanding these directories makes it much easier to navigate and manage a Linux server.
/etc – Configuration Files
The /etc directory contains system-wide configuration files. Most installed services keep their configuration here.
Examples:
/etc/ssh/ – SSH configuration;
/etc/nginx/ – Nginx configuration;
/etc/passwd – user account information;
/etc/fstab – filesystem mount settings.
You will often work with /etc when configuring a Linux server.
/var – Variable Data
/var stores files whose contents regularly change while the system is running.
Common locations:
/var/log/ – system and service logs;
/var/www/ – commonly used for website files;
/var/lib/ – application data;
/var/spool/ – mail, print, and other queues.
For example, when troubleshooting a service, /var/log/ is usually one of the first places to check.
/home – User Files
The /home directory contains personal directories for regular users.
For a user named "name": /home/name/
This directory can contain documents, downloads, scripts, SSH-related files, and user-specific application settings. The root user's home directory is different: /root/
/tmp – Temporary Files
/tmp is used by applications and users to store temporary files. Files here should not be considered permanent. Many Linux systems automatically remove old /tmp files during reboot or through scheduled cleanup.
/usr – Programs and Shared Resources
/usr contains many of the programs, libraries, and shared resources installed on the system.
Important locations include:
/usr/bin/ User commands and programs
/usr/sbin/ System administration programs
/usr/lib/ Libraries
/usr/share/ Shared application data
/usr/local/ Locally installed software
For example, commands such as nano, curl, or git will commonly have their executable files under /usr/bin/.
Knowing these five directories gives you a solid foundation for navigating Linux VPS and server environments.