title: What is the difference of /etc/fstab and /etc/mtab
body: <p>To auto-mount, admin can edit /etc/fstab or /etc/mtab. What is the difference of the two? If I set the same <code>mount</code> item in both, which one take effect?</p>
  
  <p>In /etc/stab
  <code>
  share /media/sf_share1 vboxsf gid=999,rw 0 0
  </code></p>
  
  <p>In /etc/mtab
  <code>
  share /media/sf_share vboxsf gid=999,rw 0 0
  </code></p>