Question

navicat ora-21561是什么错

Answer 1

[root@practice3 ~]# cat /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost
192.168.1.112 practicer3

/ect/hosts中的主机名多了一个字母r
删除多余的这个r，保持主机名都是practice3
重新dbca建库通过。