title: automount is not working from Linux /etc/fstab
body: <p>Centos 6.9, /usr01 mount point added in /etc/fstab:</p>
  
  <pre><code>UUID=aeb6fc55-7fb2-4a6b-aed8-3dff04c2766e /                       ext4    defaults        1 1
  tmpfs                   /dev/shm                tmpfs   defaults        0 0
  devpts                  /dev/pts                devpts  gid=5,mode=620  0 0
  sysfs                   /sys                    sysfs   defaults        0 0
  proc                    /proc                   proc    defaults        0 0
  /dev/sda4               /usr01  ext3    defaults        0       0
  </code></pre>
  
  <p>it is working ok when I manually execute mount -a</p>
  
  <pre><code>[root@sandbox ~]# df -h
  Filesystem      Size  Used Avail Use% Mounted on
  overlay          43G   23G   19G  56% /
  tmpfs           7.9G     0  7.9G   0% /dev
  tmpfs           7.9G     0  7.9G   0% /sys/fs/cgroup
  /dev/sda3        43G   23G   19G  56% /hadoop
  /dev/sda3        43G   23G   19G  56% /etc/resolv.conf
  /dev/sda3        43G   23G   19G  56% /etc/hostname
  /dev/sda3        43G   23G   19G  56% /etc/hosts
  shm             7.9G     0  7.9G   0% /dev/shm
  tmpfs           7.9G     0  7.9G   0% /dev/shm
  /dev/sda4        51G   53M   48G   1% /usr01
  </code></pre>
  
  <p>but /usr01 is not mounted in boot time. I've tried replace defaults on auto, tried to add "mount -a" in /etc/rc.local. no success.</p>
  
  <p>UPDATE: tried to mount with UUID, no success.
  after system reboot:</p>
  
  <pre><code>[root@sandbox ~]# df -h
  Filesystem      Size  Used Avail Use% Mounted on
  overlay          43G   23G   19G  56% /
  tmpfs           7.9G     0  7.9G   0% /dev
  tmpfs           7.9G     0  7.9G   0% /sys/fs/cgroup
  /dev/sda3        43G   23G   19G  56% /hadoop
  /dev/sda3        43G   23G   19G  56% /etc/resolv.conf
  /dev/sda3        43G   23G   19G  56% /etc/hostname
  /dev/sda3        43G   23G   19G  56% /etc/hosts
  shm              64M   12K   64M   1% /dev/shm
  [root@sandbox ~]# cat /etc/fstab
  
  #
  # /etc/fstab
  # Created by anaconda on Thu Jun  2 13:42:43 2016
  #
  # Accessible filesystems, by reference, are maintained under '/dev/disk'
  # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
  #
  UUID=aeb6fc55-7fb2-4a6b-aed8-3dff04c2766e /                       ext4    defaults        1 1
  tmpfs                   /dev/shm                tmpfs   defaults        0 0
  devpts                  /dev/pts                devpts  gid=5,mode=620  0 0
  sysfs                   /sys                    sysfs   defaults        0 0
  proc                    /proc                   proc    defaults        0 0
  UUID=9be134d7-aaa5-4854-aa36-4f8f70b82571               /usr01                  ext3    defaults        0 0
  [root@sandbox ~]# blkid /dev/sda4
  /dev/sda4: UUID="9be134d7-aaa5-4854-aa36-4f8f70b82571" TYPE="ext3"
  [root@sandbox ~]# mount -a
  [root@sandbox ~]# df -h
  Filesystem      Size  Used Avail Use% Mounted on
  overlay          43G   23G   19G  56% /
  tmpfs           7.9G     0  7.9G   0% /dev
  tmpfs           7.9G     0  7.9G   0% /sys/fs/cgroup
  /dev/sda3        43G   23G   19G  56% /hadoop
  /dev/sda3        43G   23G   19G  56% /etc/resolv.conf
  /dev/sda3        43G   23G   19G  56% /etc/hostname
  /dev/sda3        43G   23G   19G  56% /etc/hosts
  shm             7.9G     0  7.9G   0% /dev/shm
  tmpfs           7.9G     0  7.9G   0% /dev/shm
  /dev/sda4        51G   53M   48G   1% /usr01
  </code></pre>