# Directory Structure
DirectoryPurpose
`/`Root of the filesystem
`/bin`Essential command binaries
`/sbin`Essential system binaries
`/etc`Configuration files
`/var`Variable data (logs, cache, etc.)
`/var/log`System and application logs
`/usr`User applications and binaries
`/home`User home directories
`/root`Root user’s home directory
`/boot`Boot files and kernel
`/opt`Optional third-party software
`/tmp`Temporary files
`/dev`Device files (disks, terminals)
`/proc`Process and system info
`/sys`Kernel-related info
`/lib`, `/lib64`Shared libraries
`/media`Auto-mounted removable media
`/mnt`Temporary mount points
`/srv`Data for services (web, FTP)