Xlib: connection to ":0.0" refused by server , Xlib: No protocol specified

When I try to install oracle using silent mode of installation , I faced the below error.

[oracle@node2 database]$ ./runInstaller -silent -responsefile db_install.rsp

Xlib: connection to “:0.0” refused by server
Xlib: No protocol specified


Solution :-

login as oracle user and execute the command , do not use “su – oracle” by login to other accounts.

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