This post is about the configuration of FTP server for the specified users.
$ sudo yum install vsftpd
$ sudo nano /etc/vsftpd/vsftpd.confanonymous_enable=NO
local_enable=YES
write_enable=YES
local_umask=022
anon_upload_enable=NO
anon_mkdir_write_enable=NO
dirmessage_enable=YES
xferlog_enable=YES
connect_from_port_20=YES
xferlog_file=/var/log/vsftpd.log
xferlog_std_format=YES
ftpd_banner=Welcome to FTP server!!
chroot_local_user=YES
listen=NO
log_ftp_protocol=YES
max_per_ip=5 # Max number of allowed connections per IP Address.
max_clients=5 # Max number of different IP Addressed which are allowed to connect.
pam_service_name=vsftpd
userlist_enable=YES
tcp_wrappers=YES