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 »

Linux : R1Soft hcp module error : Could not init mrf hash!

R1Soft backup may fail in some circumstances, even though no change occurred, the agent and kernel hcp module properly installed with message that the replication driver was not detected as shown below :

Looking at the protected machine system logs, we can observe a “call trace”, memory related entries and the following regarding the… Read More »

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Web : ImagickException: attempt to perform an operation not allowed by the security policy `PDF’

After updating ImageMagick to version from an earlier version, the following behavior occur : Thumbnails generation from PDF, XPS, PS, and EPS does not work anymore The following output can be found in the Web server error log :

This is due to the addition of a policy in the newer version that… Read More »

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 :

This is particularly useful when you need to calculate proper process, max clients, etc. settings.

Linux : sar command return “Cannot open /var/log/sysstat/sa27: No such file or directory”

Attempting to use the SAR (sadc) command to lookup the historical system resources consumption metrics and got the following message? Cannot open /var/log/sysstat/sa27: No such file or directory Please check if data collecting is enabled Most likely data collecting is disabled (it is the default on several systems). You need to enable data collecting and… Read More »