mount by network location

/etc/fstab:

host.lan:/ /media/mount nfs4 _netdev,noauto,users,async 0 0

/usr/local/bin/network-mount:

#!/bin/bash
stasjon=/media/mount
ping=`/usr/bin/fping -q host.lan`
if [ $? = 0 ]; then
  mountpoint $stasjon > /dev/null
  if [ $? != 0 ]
    then mount $stasjon
  fi
  else
  mountpoint $stasjon > /dev/null
  if [ $? = 0 ]
    then umount -l $stasjon
  fi
fi

chmod +x /usr/local/bin/network-mount
crontab -e

* * * * * /usr/local/bin/network-mount