Oracle Linux: xclock Fails to Start after Switching between Users
(Doc ID 2608777.1)
Last updated on FEBRUARY 18, 2020
Applies to:Linux OS - Version Oracle Linux 6.0 and later
xclock is failing to start when running it as a normal user coming from a root user (using sudo or su).
[user@hostname ~]$ xclock
Error: can't open display
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