What is the solution to the SSH This service allows sftp connections only error?

If you receive the SSH This service allows sftp connections only error when connecting to a Linux-based operating system server via SSH, this is because you set the ForceCommand and Subsystem settings in sshd_config to sftp only.

To solve the error, we enter the following command:

We enter sshd_config with nano /etc/ssh/sshd_config.

At the bottom there will be lines of code as follows. We turn them into comment lines by putting a # sign in front of them.

Subsystem sftp internal-sftp
#Match User root
#X11Forwarding no
# AllowTcpForwarding no
#PermitTTY no
# ForceCommand internal-sftp -d /home/ubuntu

After completing the process, we restart the server with the following command.

systemctl restart ssh