ls /

bin      boot  etc   lib    media  opt   public  run   srv  tmp  var
bioapps  dev   home  lib64  mnt    proc  root    sbin  sys  usr

ls /usr/

bin  etc  games  include  lib  lib64  libexec  local  sbin  share  src  tmp

ls /var/

account  crash  ftp     kerberos  lock  named  preserve     spool   www
adm      db     games   lib       log   nis    run          target  yp
cache    empty  gopher  local     mail  opt    singularity  tmp

ls /home/

tree -L 1 /

/
├── bin -> usr/bin
├── bioapps
├── boot
├── dev
├── etc
├── home
├── lib -> usr/lib
├── lib64 -> usr/lib64
├── media
├── mnt
├── opt
├── proc
├── public
├── root
├── run
├── sbin -> usr/sbin
├── srv
├── sys
├── tmp
├── usr
└── var

21 directories, 0 files