Linux File System

Every thing in unix and linux is a file. 

/   root

|_/bin/ - all the system binaries exists. i.e. cat, chgrp, chmod, cp, data, dd, df, dmesg, echo, false, hostname, kill, ln, login, ls, mkdir, mknod, more, mount, mv, ps, pwd, rm, rmdir, sed, sh, stty, su, synch, true, umount, uname.

|_/opt/ -  config file for add on application software.

|_/boot/ - static files of boot loader. i.e. kernel, sstem.map, vmlinuz, initrd, grub, module.info, boot.

|_/root/ -

|_/dev/ -all of the devices on the computer. i.e. mouse, keyboard, monitor etc.

|_/sbin/ -

|_/etc/ -host specific system config. csh.login, exports, fstab, ftpusers, gateways, gettydefs, group, host.conf, hosts, hosts.allow, hosts.deny, hosts.equiv, hosts.lpd, inetd.conf, inittab, issue, ls.so.conf, motd, mtab, mtools, networks, passwd, printcap, profile, protocols, resolv.conf, rpc, securetty, services, shells, syslog.conf.

|_/srv/ -

|_/home/ -

|_/tmp/ -

|_/lib/ -

|_/usr/ -sharable and readonly data.

        |_/local - local software

        |_/bin/ - most users command

        |_/include/

        |_/lib/    

        |_/sbin/

|_/media/

|_/var/

         |_/cache/

         |_/log/        

         |_/spool/

         |_/tmp/

|_/mnt/