PuTTY X11 proxy: Authorisation not recognised
Error: Can't open display: localhost:10
Error:
[dbadmin53@brvmoracle ~]$ sudo su - oracle
Last login: Wed Dec 16 09:43:51 +03 2020 on pts/0
[oracle@brvmoracle ~]$ xclock
PuTTY X11 proxy: Authorisation not recognised
Error: Can't open display: localhost:10
or
[oracle@brvmoracle ~]$ dbca
PuTTY X11 proxy: Authorisation not recognised
Exception in thread "main" java.lang.NoClassDefFoundError: Could not initialize class sun.awt.X11.XToolkit
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:264)
at java.awt.Toolkit$2.run(Toolkit.java:860)
at java.awt.Toolkit$2.run(Toolkit.java:855)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:854)
at com.jgoodies.looks.LookUtils.isLowResolution(LookUtils.java:484)
at com.jgoodies.looks.LookUtils.<clinit>(LookUtils.java:249)
at com.jgoodies.looks.plastic.PlasticLookAndFeel.<clinit>(PlasticLookAndFeel.java:135)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:348)
at javax.swing.SwingUtilities.loadSystemClass(SwingUtilities.java:1874)
at javax.swing.UIManager.setLookAndFeel(UIManager.java:582)
at oracle.install.commons.util.Application.startup(Application.java:917)
at oracle.install.commons.flow.FlowApplication.startup(FlowApplication.java:181)
at oracle.install.commons.flow.FlowApplication.startup(FlowApplication.java:198)
at oracle.assistants.common.base.driver.AssistantApplication.startup(AssistantApplication.java:320)
at oracle.assistants.dbca.driver.DBConfigurator.startup(DBConfigurator.java:342)
at oracle.assistants.dbca.driver.DBConfigurator.main(DBConfigurator.java:386)
[oracle@brvmoracle ~]$
Reason:
Switching from 'dbadmin53' user to 'oracle' user - causing the error.
Try login with oracle user directly from putty.
