Category Archives: Servers

Linux : cPanel outgoing email return “this server is not permitted to relay through this server without authentication”

Recently, without any change, I noticed that some cPanel servers stop sending email and return the following error: 550-Please turn on SMTP Authentication in your mail client. 550-hostname.domain.tld [0.0.0.0]:00000 is not permitted to relay 550 through this server without authentication. What is really puzzling in that case is that this message showed up even though… Read More »

Linux : R1Soft Backup Server manager stuck on “This may take several minutes” forever

I came across the following issue recently, where R1Soft backup server service was just restarted and showing the page that indicate that the service is currently in the starting process ; Idera Server Backup Manager This may take several minutes If you are the administrator, check the log files for details. Otherwise, please check back… Read More »

Linux : How to disable the message “Activate the web console with…” on RHEL 8

Red Hat introduced “Cockpit” starting with version 8 of their operating system. For that matter, they have added a banner at login that suggest how to enable it as followed: Activate the web console with: systemctl enable –now cockpit.socket If you have no business using it, you might want to get rid of that banner… Read More »

Web: ownCloud Transactional file locking should be configured

Getting the following notice from your ownCloud administrator account setting page? Transactional file locking should be configured ownCloud have the capability of managing file/folder locking on its own, on top of the filesystem. This is a must-have feature especially for large, busy, multi-users servers, and especially when users use their account on multiple devices. You… 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 »

Windows : Update error 0x80092004 on Windows 7 or Server 2008

If you encounter error 0x80092004 while installing updates on Windows 7 or Server 2008 R2, it is most likely due to some cryptography issues (CRYPT_E_NOT_FOUND). To workaround this problem, you need to manually install the following update(s) : SHA-2 code signing support update for Windows Server 2008 R2, Windows 7, and Windows Server 2008: September… 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 :

8/26/20 5:14:58 PM	Error	Protected Machine	An exception occurred during the request. The replication driver was not detected (detail: An error occurred while loading the hcpdriver module, please check your system logs; Please run "r1soft-setup --get-module " on your Agent to install one. ).
8/26/20 5:14:58 PM	Error	Manager			Error replicating device / (99b71fd6-4676-4fdf-b6fe-8923a64a0531)
8/26/20 5:14:58 PM	Error	Manager			Agent reported error during requested operation

8/26/20 5:14:58 PM Error Protected Machine An exception occurred during the request. The replication driver was not detected (detail: An error occurred while loading the hcpdriver module, please check your system logs; Please run "r1soft-setup --get-module " on your Agent to install one. ).

8/26/20 5:14:58 PM Error Manager Error replicating device / (99b71fd6-4676-4fdf-b6fe-8923a64a0531)

8/26/20 5:14:58 PM Error Manager Agent reported error during requested operation

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

Linux : Drop MySQL database return error db.opt Errcode: 13 – Permission denied

Trying to drop (delete) a MySQL database using CLI and the following error is returned? ERROR 6 (HY000): Error on delete of ‘./database//db.opt’ (Errcode: 13 – Permission denied) This is most likely due to permission issue on the database folder or a file within that folder. Have a look at the MySQL database folder using… Read More »

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

After updating ImageMagick to version 6.9.10.23+ 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 :

PHP Fatal error: Uncaught ImagickException: attempt to perform an operation not allowed by the security policy `PDF' @ error/constitute.c/IsCoderAuthorized/408 in /path/to//pdfThumb.php:7\nStack trace:\n#0 /path/to/pdfThumb.php(7): Imagick->__construct('../files/9984/C...')\n#1 {main}\n thrown in /path/to/pdfThumb.php on line 7, referer: https://hostname.domain.tld

PHP Fatal error: Uncaught ImagickException: attempt to perform an operation not allowed by the security policy `PDF' @ error/constitute.c/IsCoderAuthorized/408 in /path/to//pdfThumb.php:7\nStack trace:\n#0 /path/to/pdfThumb.php(7): Imagick->__construct('../files/9984/C...')\n#1 {main}\n thrown in /path/to/pdfThumb.php on line 7, referer: https://hostname.domain.tld

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 :

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)}'

1	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 clients, etc. settings.