FTP

1. Firewall
   1. sudo ufw enable
   2. sudo ufw allow 20/tcp, sudo ufw allow 21/tcp
      1. or sudo ufw allow ftp
2. vsftpd
   1. sudo apt-get install vsftpd
   2. sudo cp /etc/vsftpd.conf /etc/vsftpd.conf.bak
   3. sudo vim /etc/vsftpd.conf
      1. local_enable=YES
      2. write_enable=YES
      3. sudo systemctl restart vsftpd
3. filezila
   1. sftp
   2. user/password

References

https://www.digitalocean.com/community/tutorials/how-to-set-up-vsftpd-for-a-user-s-directory-on-ubuntu-16-04