build worldBuild world:
  Setelah cvsup, hapus isi direktori /usr/obj
  # cd /usr/obj
  # chflags -R noschg *
  # rm -rf *

  Compile sources
  # cd /usr/src
  # make buildworld
  Masuk ke single user mode [tidak wajib]
  # shutdown now
  # mount -u /
  # mount -a -t ufs
  # swapon -a
  Install world
  # cd /usr/src
  # make installworld
  Back-up /etc kemudian update dengan mergemaster
  # tar -cvzf /home/user/etc-old.tgz /etc
  # /usr/sbin/mergemaster -v
  Update /dev
  # cd /dev
  # /bin/sh MAKEDEV all
  Update /stand
  # cd /usr/src/release/sysinstall
  # make clean
  # make all install
  Compile kernel