How to resolve "No protocol specified" error

Error 1)

[oracle@prod ~]$ dbca
No protocol specified

Error 2)

[oracle@prod ~]$ netca

Oracle Net Services Configuration:
No protocol specified
Error: null
Check the trace file for details: /u01/app/oracle/cfgtoollogs/netca/trace_OraDb11g_home1-1901166PM3102.log
Oracle Net Services configuration failed.  The exit code is 1

Solution

Step 1) login as root user

Step 2) run command xhost +
this command allows you to use any graphical tool

Example: -

[root@prod Desktop]# xhost +
access control disabled, clients can connect from any host

Step 3) Now again run graphical tool utility command, that issue will get resolved now.

[oracle@prod ~]$ dbca










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