Category Archives: Operating Systems

Linux : SSH X11 forwarding xauth .Xauthority does not exist

The following message may show up the first time you SSH login to a X11 forwarding enabled machine : /usr/bin/xauth: file /home/%user/.Xauthority does not exist In order to workaround this issue, just do the following : 1. Create an empty file for the concerned user :

2. Change the user/group permission to match the… Read More »

Linux : Loading jnlp with IcedTea Java browser plugin hang at x%

When trying to load a java “jar” (.jnlp)  file from Java Web browser plugin hang at x% and never complete. This is a common issue and require clearing the IcedTea Web cache. 1. Clear your Web browser cache and close it ; 2. Clear the IcedTea cache using the following command :

Then open… Read More »

Linux : InRelease’ changed its ‘Version’ value from ‘10.1’ to ‘10.2’

You probably noticed a similar output after running “apt-get update” on your Debian Linux based system: N: Repository ‘ buster InRelease ‘ changed its ‘Version’ value from ‘10.9’ to ‘10.11’ E: Repository ‘ buster InRelease ‘ changed its ‘Suite’ value from ‘stable’ to ‘oldstable’ […] This means that the major and minor version you are… Read More »

Windows : How to open a port on firewall from command line (CLI)

Windows Firewall can be configured from the GUI (by using firewall.cpl UI console) and also using the command line. This quick tutorial will cover how to manipulate the rules from CLI to open, block a port and delete a rule. In  a nutshell, here is the command sample:

The rest of this article will… Read More »

Linux : cPanel The service “imap” appears to be down

Encountering the following issue with Dovecot/IMAP service on your cPanel server lately? The service “imap” appears to be down Reason TCP Transaction Log: << * OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE NAMESPACE LITERAL+ STARTTLS AUTH=PLAIN AUTH=LOGIN] Dovecot ready. >> A001 LOGIN __cpanel__service__auth__imap__nJl5Hcz7gc9iiv1r V0TeDQVaynp8zl9g << * BYE Internal error occurred. Refer to server log… Read More »