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 »
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 :
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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 »
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 »
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 :
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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 »
Here is an easy way to output in a single command the Apache memory usage and average process size :
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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.
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 »
Having the following error while importing a MySQL dump? phpMyAdmin – Error Incorrect format parameter Have a look at the “upload_max_filesize” value in your “php.ini” parameters. Most of the time, the dump file you are trying to import exceed that limit. Increase the value as needed.
If you changed the hostname/FQDN of a Linux server, you may end up with some issues, especially with mailing if some areas were forgotten with that change. Here is a quick procedure involving all the steps you should be looking for. (The following example is based on a Debian Linux system running Postfix MTA.) 1.… Read More »
OpenVPN enforce by default a 15 minutes lockout policy for unsuccessful login attempts. As an avid system administrator and used to end-user struggles, you most likely encountered many times situations where a user tried to log in 20 times and blaming you that it isn’t working (all that because they are entering the wrong password,… Read More »
Having the following login error attempting to establish a RDP session to a Windows server or workstation? The requested session access is denied. The following behavior apply to your case: The user you are using is a part of the Remote Desktop Users group (or allowed to the RDP users) The user is a non-administrator… Read More »