打开Linux ftp服务，如：vsftpd: unrecognized service

[root@BZXXDBS02 ~]# service vsftpd start
vsftpd: unrecognized service
[root@BZXXDBS02 ~]#

编写：
vi   /etc/xinetd.d/gssftp  把disable=yes改成no，然后打开ftp服务

把server_args     = -l -a  改成  server_args     = -l  把 -a 去掉，这样系统的用户才有权限用ftp登陆

[root@BZXXDBS02 ~]# 
[root@BZXXDBS02 ~]# service xinetd restart
Stopping xinetd:                                           [  OK  ]
Starting xinetd:                                           [  OK  ]

查看21端口：
[root@BZXXDBS02 etc]# netstat -tnl
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address               Foreign Address             State      
tcp        0      0 127.0.0.1:2208              0.0.0.0:*                   LISTEN      
tcp        0      0 0.0.0.0:11111               0.0.0.0:*                   LISTEN      
tcp        0      0 192.168.70.20:21064         0.0.0.0:*                   LISTEN      
tcp        0      0 0.0.0.0:111                 0.0.0.0:*                   LISTEN      
tcp        0      0 0.0.0.0:16851               0.0.0.0:*                   LISTEN      
tcp        0      0 0.0.0.0:852                 0.0.0.0:*                   LISTEN      
tcp        0      0 0.0.0.0:21                  0.0.0.0:*                   LISTEN