FTP is enabled by default. But, if the system is disabled you need to log in into the system as root.
1. Log in into the system and enter the ftp path.
# more /etc/ftpd/ftpusers
2. Find the root line and confirm that the root is not comment out yet.
3. vi the ftpd path.
# vi /etc/ftpd/ftpusers
4. Comment out the root line (#root).
Then, save the work and try to ftp into the system.
