下記のツイートが話題になってたのでメモ。

まとめると、以下の通り。

Directory Description
/bin Essential command binaries
/boot System boot loader files
/dev Device files
/etc Host-specific system-wide configuration files
/home User home directory
/lib Shared library modules
/media Media file such as CD-ROM
/mnt Temporary mounted filesystems
/opt Add-on application software packages
/proc Interface to kernel data structures
/root Home directory for root user
/run Run-time program data
/sbin System binaries
/srv Site-specific data served by this system
/sys Virtual directory providing information about the system
/tmp Temporary files
/usr Unix System Resources
/var File that is expected to continuously change