Check if the DISPLAY variable is set in Linux environment

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Most of the users have been getting Could not execute auto check for display colors using command /usr/bin/xdpyinfo. Check if the DISPLAY variable is set in Linux environment while checking requirement the oracle installations on  Linux 5.2 or later versions.

Below is the screenshot of the issue















I have tried plenty of options, even ignoring the pre-requisites.

















Finally, i have fixed this issue through one Linux command

Steps to resolve this issue:

1) login into root user( su -l root)
2) execute this command xhost +SI:localuser:oracle
3) login to the oracle user
4) execute ./runInstaller










Now, it'll work fine.

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