Ubuntu 20.04
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Samba : Limited Shared Folder
2020/05/19
 
Install Samba to Configure File Server.
For example, Create a shared Folder that users in [smbgroup01] group can only access to shared folder [/home/share01] and also they are required user authetication.
[1] Install and Configure Samba.
root@smb:~#
apt -y install samba
root@smb:~#
groupadd smbgroup01

root@smb:~#
mkdir /home/share01

root@smb:~#
chgrp smbgroup01 /home/share01

root@smb:~#
chmod 770 /home/share01

root@smb:~#
vi /etc/samba/smb.conf
[global]
   # line 25: add (set charset)
   unix charset = UTF-8

   # line 30: confirm (Windows default)
   workgroup = WORKGROUP

   # line 40: uncomment and add network you allow to access
   interfaces = 127.0.0.0/8 10.0.0.0/24

   # line 101: comment out and add the line below
   #map to guest = bad user
   security = user

.....
.....

# add to the end
# any Share name you like
[Share01]
   # specify shared directory
   path = /home/share01
   # allow writing
   writable = yes
   # not allow guest user (nobody)
   guest ok = no
   # allow only [smbgroup01] group
   valid users = @smbgroup01
   # set permission [777] when file created
   force create mode = 777
   # set permission [777] when folder created
   force directory mode = 777
   # inherit permissions from parent folder
   inherit permissions = yes 

root@smb:~#
systemctl restart smbd

# add Samba user

root@smb:~#
adduser ubuntu

root@smb:~#
smbpasswd -a ubuntu

New SMB password:    
# set passwords

Retype new SMB password:
Added user ubuntu.
root@smb:~#
usermod -G smbgroup01 ubuntu

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