Configuring vsftpd
vsftpd is the package to install ftp server in linux.
to install vsftpd:

using apk: apk add vsftpd
using rpm:
using apt ( ubuntu): sudo apt get install vsftpd

to configure ftp:
vi /etc/vsftpd/vsftpd.conf

local_enable=YES
any user defined in /etc/passwd will be able to login with their relevant passwords.
write_enable=YES
to emable write access to the ftp server
anonymous_enable=YES
allow anonymous FTP access
To restart FTP and load the new configuratrion:
/etc/init.d/vsftpd restart
see more....http://btechconsult..com.ng/2015/09/how-to-install-ftp-server-in-linux.html