Creating an SFTP Group and User

apt update
addgroup sftp_fosslinux
useradd -m sftpfossuser -g sftp_fosslinux
passwd sftpfossuser
chmod 700 /home/sftpfossuser/

Installing SSH Daemon

apt install -y ssh
echo "Match group sftp_fosslinux 
ChrootDirectory /home 
X11Forwarding no 
AllowTcpForwarding no 
ForceCommand internal-sftp" >> /etc/ssh/sshd_config
systemctl restart ssh

OpenSSHをインストール

apt install -y openssh-server
service ssh start

試し

sftp sftpfossuser@127.0.0.1

Laravel

# config/filesystems.php

'sftp-test' => [
            'driver' => 'sftp',
            'host'   => '127.0.0.1',
            'username' => 'sftpfossuser',
            'password' => 'sftpfossuser',
            'visibility' => 'public',
            'permPublic' => 0766,
            'root' => '/sftpfossuser'
        ],