$ bash -x /etc/init.d/nfs-kernel-server restart
+ DESC='NFS kernel daemon'
+ PREFIX=/usr
+ '[' -x /usr/sbin/rpc.nfsd ']'
+ '[' -x /usr/sbin/rpc.mountd ']'
+ '[' -x /usr/sbin/exportfs ']'
+ DEFAULTFILE=/etc/default/nfs-kernel-server
+ RPCNFSDCOUNT=8
+ RPCNFSDPRIORITY=0
+ RPCMOUNTDOPTS=
+ NEED_SVCGSSD=no
+ RPCSVCGSSDOPTS=
+ PROCNFSD_MOUNTPOINT=/proc/fs/nfsd
+ '[' -f /etc/default/nfs-kernel-server ']'
+ . /etc/default/nfs-kernel-server
++ RPCNFSDCOUNT=8
++ RPCNFSDPRIORITY=0
++ RPCMOUNTDOPTS=--manage-gids
++ NEED_SVCGSSD=
++ RPCSVCGSSDOPTS=
+ . /lib/lsb/init-functions
++ FANCYTTY=
++ '[' -e /etc/lsb-base-logging.sh ']'
++ . /etc/lsb-base-logging.sh
+ case "$1" in
+ /etc/init.d/nfs-kernel-server stop
 * Stopping NFS kernel daemon
   ...done.
 * Unexporting directories for NFS kernel daemon...
exportfs: could not open /var/lib/nfs/.etab.lock for locking: errno 13 (Permission denied)
exportfs: can't lock /var/lib/nfs/etab for writing
   ...done.
+ sleep 1
+ /etc/init.d/nfs-kernel-server start
 * Exporting directories for NFS kernel daemon...
exportfs: could not open /var/lib/nfs/.etab.lock for locking: errno 13 (Permission denied)
exportfs: can't lock /var/lib/nfs/etab for writing
   ...done.
 * Starting NFS kernel daemon