How to flush DNS cache on Debian Linux

 1. Enable systemd-resolved.service by:

     #systemctl enable systemd-resolved.service


2.Flush the  DNS cache using:

   #resolvectl flush-caches

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How to increase ESXi webclient login user application timeout

 To increase the default 15min timeout to 2hr Login to the esxi webclient on the right top corner ->Click the User login tab Select "...