For some static sites and for uploading files in folders not accessible or not tracked by git.
There is nothing to install if you went through the ssh server.
sudo addgroup sftp
sudo useradd -m ftpuser -g sftp
sudo passwd ftpuser
After that you will need to reboot/logout.
sudo nano /etc/ssh/sshd_config
Match group sftp
ChallengeResponseAuthentication no
AuthenticationMethods password
PasswordAuthentication yes
# ChrootDirectory /var/www. # otherwise broken pipe as chroot dir must be owned by root
X11Forwarding no
AllowTcpForwarding no
ForceCommand internal-sftp
In sudo nano /etc/pam.d/sshd add auth [success=done default=ignore] pam_succeed_if.so user ingroup sftp