file tree / : root directory bin : executable files ls, zip, cat, chown, df, du, env, ftp, grep, ... etc : system configuration files password (password file), hostname (the name of this server), … home : user home directories linuxer2 (home for user linuxer2), park(home for user park), … usr : library files, header files lib (library files are here), include (header files are here), …
