In linux redhat, enabling the ftp service to install oracle RDBMS requires tar software and ftp is unavailable. As a result, google. Environment: www.2cto.com [oracle @ RPS-SERVER-1 ~] $ Uname-aLinux RPS-SERVER-1 2.6.18-194. el5 #1 SMP Tue Mar 16 21:52:39 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux ntsysv go in and find vsftpd. If yes, select it. If not, install it. I will not install it for the moment, configuration. Click OK. Restart the vsftpd service: service vsftpd restart. At this time, ftp can be connected, but users cannot log on. You need to modify the configuration file. Cd/etc/vsftpd/[root @ RPS-SERVER-2 vsftpd] # lltotal 24-rw --- 1 root 126 Nov 23 ftpusers-rw --- 1 root 368 Nov 23 user_list-rw --- 1 root 4595 nov 24 vsftpd. conf-rwxr-r-1 root 338 Dec 4 2009 vsftpd_conf_migrate.sh edit vsftpd. conf, modify or add: userlist_deny = NO. edit user_list. add a user that allows ftp. Restart service: service vsftpd restart ftp again ., A new error was found: 421 Service not available, remote server has closed connection. In this case, edit vsftpd. conf again and find chroot_list_enable = YES at www.2cto.com. Comment out directly. Save and exit. Restart the service. Ftp again, successful. -EOF