How add FTP user at backend in linux?

■ Requirement : add FTP user at backend 
■ OS Environment : Linux[RHEL, Centos]
■ Application: vsftpd
■ Implementation Steps : 

$ useradd -m testing -G users,ftp,wheel -s /bin/bash
$ passwd testing
$ getsebool ftp_home_dir
$ setsebool -P ftp_home_dir on