network_share.txt

sudo apt update && sudo apt install apt-offline -y
sudo apt-offline set --update --upgrade apt-offline.sig
sudo apt-offline get apt-offline.sig --bundle bundle.zip

# Transfer bundle.zip to air-gapped via USB.
# On air-gapped:

sudo apt-offline install bundle.zip

sudo apt-offline set --install-packages samba apt-offline.sig

# Transfer apt-offline.sig to connected machine via USB.
On connected:

sudo apt-offline get apt-offline.sig --bundle bundle.zip

# Transfer bundle.zip back to air-gapped.
# On air-gapped:

sudo apt-offline install bundle.zip

# Proceed with Share CreationCreate shared directory:

sudo mkdir /shared
sudo chown nobody:nogroup /shared
sudo chmod 0775 /shared

# Backup and edit Samba config:

sudo cp /etc/samba/smb.conf /etc/samba/smb.conf.bak
sudo nano /etc/samba/smb.conf

# Add at end:
 
[shared]
comment = Shared Folder
path = /shared
browsable = yes
guest ok = no
read only = no
create mask = 0755

# Test config and restart Samba:

sudo testparm
sudo systemctl restart smbd
sudo systemctl enable smbd

# Set Samba password (replace yourusername):

sudo smbpasswd -a yourusername

# Delete the Network Share on Air-Gapped UbuntuEdit Samba config:

sudo nano /etc/samba/smb.conf

# Delete [shared] section. Test config and restart Samba:

sudo testparm
sudo systemctl restart smbd

# Remove directory:

sudo rmdir /shared

# (Optional) Restore config:

sudo mv /etc/samba/smb.conf.bak /etc/samba/smb.conf
sudo systemctl restart smbd

# (Optional) Uninstall Samba:

sudo apt-offline set --install-packages samba apt-offline.sig  # Generate sig for removal (use --uninstall-packages if supported, else manual)

# Transfer sig to connected, get bundle, install on air-gapped:

sudo apt-offline install bundle.zip
sudo apt purge samba -y
sudo apt autoremove -y