Linux : How to create a SAN SSL certificate request

This procedure will show you how to create Subject Alternate Name (SAN), or in other words, a certificate request with multiple Common Name (CN) DNS aliases. It order to do so, we need to create a CSR request template as shown below: 1. Create the certificate request template as followed: [req] distinguished_name = req_distinguished_name req_extensions… 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 »

PanOS : Failed to load into software manager

The following error message may happen from time to time when attempting to load new software version in Palo Alto Firewall or Panorama : Successfully downloaded Preloading into software manager Error: Image File Authentication Error Failed to load into software manager. Please retry. Post processing failed. Please retry PanOS always do software image integrity check… Read More »

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Linux : How to show Apache memory usage and average process size

Here is an easy way to output in a single command the Apache memory usage and average process size : ps -ylC apache2 | awk ‘{x += $8;y += 1} END {print “Apache Memory Usage (MB): “x/1024; print “Average Proccess Size (MB): “x/((y-1)*1024)}’ This is particularly useful when you need to calculate proper process, max… Read More »