Install vsftpd on Ubuntu
- apt install vsftpd
- edit /etc/vsftpd.conf
- local_enable=YES
- local_umask=022
- write_enable=YES
- chroot_local_user=YES
- allow_writeable_chroot=YES
- pasv_enable=Yes
- pasv_min_port=40000
- pasv_max_port=40100
- service vsftpd restart