[oracle@phydb admin] /home/oracle/app/oracle/product/11.2.0/dbhome_1/bin/tnslsnr
Unable to resolve address for localhost:6150
ONS runtime exiting

解决方法，保证localhost这行存在，127.0.0.1 localhost
[root@phydb ~]# cat /etc/hosts

Do not remove the following line, or various programs

that require network functionality will fail.

127.0.0.1 localhost
::1 localhost6.localdomain6 localhost6
10.1.1.21 sap
[root@sap ~]#