Setup sFTP Server on Ubuntu 20.04

Install SSH Server

$ sudo apt-get install ssh-server -y

• Configure FTP on sshd_config

/etc/ssh/sshd_config

$ sudo vi /etc/ssh/sshd_config

Edit sshd_config file

• find and comment

#Subsystem       sftp    /usr/lib/openssh/sftp-server

• and append the following to file

Subsystem sftp internal-sftp
Match group ftpaccess
ChrootDirectory %h
X11Forwarding no
AllowTcpForwarding no
ForceCommand internal-sftp

• restart ssh service

$ sudo systemctl restart ssh

Create SFTP user account

• add group

$ sudo addgroup sftp

• next, Create user for sFTP

$ sudo useradd -m sftpUser -g sftp

eg. create user is sftpUser and assign to sftp group

• then, Set password

$ sudo passwd sftpUser
...
New password:
Retype new password:
passwd: password updated successfully

• lastly, Change permission for other user on system deny acess

$ sudo chmod 700 /home/sftpUser # /home/<username>

All Done

---

Test login via SFTP

$ sftp sftpUser@<ip or hostname>

if your has the same problem as below

$ sftpUser@<ip or hostname>: Permission denied (publickey).
Connection closed
Connection closed.

• change sshd_config

/etc/ssh/sshd_config

PasswordAuthentication no
# to
PasswordAuthentication yes

• and restart ssh service

$ sudo systemctl restart ssh

• test login via sFTP again

$ sftp [email protected]
[email protected]'s password:
Connected to xx.xx.xx.xx.
sftp>

• test connect via FileZilla