Add the share definition to /etc/samba/smb.conf
#======================= Share Definitions =======================

guest account = nobody
restrict anonymous = 1

[chrisnewland]
comment=chrisnewland
path=/home/chrisnewland
printable=no
read list=chrisnewland
write list=chrisnewland
create mask = 0700
directory mask = 0700
Add the samba user:
/home/chrisnewland# smbpasswd -a chrisnewland
New SMB password: foobar
Retype new SMB password: foobar
Added user chrisnewland.
Restart the samba daemon:
/home/chrisnewland# /etc/init.d/samba restart