Samba4 Configuration & init script https://wiki.samba.org/index.php/Samba4/InitScript

Installation

https://wiki.samba.org/index.php/Samba_4/OS_Requirements#Debian_or_Ubuntu
http://www.samba.org/

samba.sh

#!/bin/sh

### BEGIN INIT INFO
# Provides:          samba
# Required-Start:    $network $local_fs $remote_fs
# Required-Stop:     $network $local_fs $remote_fs
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Should-Start:      slapd
# Should-Stop:       slapd
# Short-Description: start Samba daemons (nmbd and smbd)
### END INIT INFO

# Description of this script:
#                    
# This script comes initially from a Debian Squeeze machine on
# which samba 3.x was installed with "apt-get install samba". The script
# was modified/adjusted so it points to the correct paths of a default
# samba4 installation (/usr/local/samba).
#
# Installation instructions:
# (1) copy the content of this script into your clipboard or download it
# (2) save the content into /etc/init.d/samba of your samba4 host.
# (3) execute "chmod +x /etc/init.d/samba" to have the script executable
# (4) execute "update-rc.d samba defaults" to install auto-start function.
#     smbd+nmbd will automatically being started after earch system start/reboot
# 
# Modified by local@#samba~irc.freenode.net at 06th March 2013
# The script was successfully tested on Debian GNU/Linux Squeeze+Wheezy

# Defaults
RUN_MODE="daemons"

# Reads config file (will override defaults above)
[ -r /etc/default/samba ] && . /etc/default/samba

PIDDIR=/usr/local/samba/var/run
NMBDPID=$PIDDIR/nmbd.pid
SMBDPID=$PIDDIR/smbd.pid

# clear conflicting settings from the environment
unset TMPDIR

# See if the daemons are there
test -x /usr/local/samba/sbin/nmbd -a -x /usr/local/samba/sbin/smbd || exit 0

. /lib/lsb/init-functions

case "$1" in
        start)
                log_daemon_msg "Starting Samba daemons"
                # Make sure we have our PIDDIR, even if it's on a tmpfs
                install -o root -g root -m 755 -d $PIDDIR

                NMBD_DISABLED=`testparm -s --parameter-name='disable netbios' 2>/dev/null`
                if [ "$NMBD_DISABLED" != 'Yes' ]; then
                        log_progress_msg "nmbd"
                        if ! start-stop-daemon --start --quiet --oknodo --exec /usr/local/samba/sbin/nmbd -- -D
                        then
                                log_end_msg 1
                                exit 1
                        fi
                fi

           if [ "$RUN_MODE" != "inetd" ]; then
                        log_progress_msg "smbd"
                        if ! start-stop-daemon --start --quiet --oknodo --exec /usr/local/samba/sbin/smbd -- -D; then
                                log_end_msg 1
                                exit 1
                        fi
                fi

                log_end_msg 0
                ;;
        stop)
                log_daemon_msg "Stopping Samba daemons"
                log_progress_msg "nmbd"

                start-stop-daemon --stop --quiet --pidfile $NMBDPID
                # Wait a little and remove stale PID file
                sleep 1
                if [ -f $NMBDPID ] && ! ps h `cat $NMBDPID` > /dev/null
                then
                        # Stale PID file (nmbd was succesfully stopped),
                        # remove it (should be removed by nmbd itself IMHO.)
                        rm -f $NMBDPID
                fi 

                if [ "$RUN_MODE" != "inetd" ]; then
                        log_progress_msg "smbd"
                        start-stop-daemon --stop --quiet --pidfile $SMBDPID
                        # Wait a little and remove stale PID file
                        sleep 1
                        if [ -f $SMBDPID ] && ! ps h `cat $SMBDPID` > /dev/null
                        then
                                # Stale PID file (nmbd was succesfully stopped),
                                # remove it (should be removed by smbd itself IMHO.)
                                rm -f $SMBDPID
                        fi
                fi

                log_end_msg 0

                ;;

     reload)
                log_daemon_msg "Reloading /usr/local/samba/etc/smb.conf" "smbd only"

                start-stop-daemon --stop --signal HUP --pidfile $SMBDPID

                log_end_msg 0
                ;;
        restart|force-reload)
                $0 stop
                sleep 1
                $0 start
                ;;
        status)
                status="0"
                NMBD_DISABLED=`testparm -s --parameter-name='disable netbios' 2>/dev/null`
                if [ "$NMBD_DISABLED" != "Yes" ]; then
                        status_of_proc -p $NMBDPID /usr/local/samba/sbin/nmbd nmbd || status=$?
                fi
                if [ "$RUN_MODE" != "inetd" ]; then
                        status_of_proc -p $SMBDPID /usr/local/samba/sbin/smbd smbd || status=$?
                fi
                if [ "$NMBD_DISABLED" = "Yes" -a "$RUN_MODE" = "inetd" ]; then
                        status="4"
                fi
                exit $status
                ;;
        *)
                echo "Usage: /etc/init.d/samba {start|stop|reload|restart|force-reload|status}"
                exit 1
                ;;
esac

exit 0

smb.conf

# Global parameters
[global]
workgroup = WORKGROUP
netbios name = UBUNTU
wins support = yes
client lanman auth = yes

security = user
passdb backend = tdbsam

# http://0x00.sinaapp.com/post/118
oplocks = no
level2 oplocks = no

[www]
valid users = www
browseable = yes
writable = yes
hosts allow = 192.168.1.0/24
public = yes
guest ok = yes
read only = no
create mask = 0775
directory mask = 0775