If you Dell PowerEdge server have a PERC Raid controller, you may get a warning after the bios controller has started during the boot and of course, a amber diagnostic light flashing on font and back of the server telling you something goes wrong with the hardware! If you get a front display, it will… Read More »
If you’ve done a Basic/Minimal OS install on RHEL/CentOS Linux, setuptool (which could be invoked typing “setup” in terminal), this tool is probably missing on your system. To install it via Yum repository, simply type the following command : yum install setuptool system-config-securitylevel-tui authconfig system-config-network-tui ntsysv There is a description of each packages : setuptool… Read More »
You may encounter this error on VMware ESX / ESXi server on a guest event console (on vSphere Client) : Error message from host.domain.tld: Failed to connect ethernet0 Of course, the guest system have no functional network. This probably happen if you actually rename a Virtual Network that was previously used by the guest. Changes… Read More »
Webmin and Usermin can be installed and updated directly through YUM. To achieve this, we need to setup manually the repository. First, create the .repo file for YUM : vi /etc/yum.repos.d/webmin.repo Copy, paste and save the following : [Webmin] name=Webmin Distribution Neutral#baseurl=http://download.webmin.com/download/yum mirrorlist=http://download.webmin.com/download/yum/mirrorlist enabled=1 Save the PGP key : wget http://www.webmin.com/jcameron-key.asc Import the key :… Read More »
Using OpenVPN Server on Linux as well as Windows machine, you may encounter this error trying to connect a client : Unable to obtain Session ID from “vpn.domain.tld”, port(s)=443: XML-RPC: TimeoutError Unable to obtain Session ID from “vpn.domain.tld”, port(s)=443: XML-RPC: ‘400’, ‘Bad Request’ This happen because HTTPS (SSL) port (TCP-443) is closed either on the… Read More »
Trying to import Excel datasheet into MSSQL database using .NET application and get this error? The ‘Microsoft.ACE.OLEDB.12.0’ provider is not registered on the local machine This indicate you are required to install the two following component on the server : Access Database Engine as well as Excel. http://www.microsoft.com/download/en/details.aspx?id=13255
Just like php, you can create a test page in order to verify if .NET is installed and working properly. The following will also display the running version. Simply create plain text file using Notepad or your favorite text editor : test.aspx And insert this code : <%@ Page Language=”VB” %> <script runat=”server”> Protected Sub… Read More »
On most heavy usage servers, you probably need to override the maximum open file descriptors in order to handle the load! Do not play with this setting blindly, make sure you know what you’re doing! In most case, you will be warned in log wit message like this : Too many open files You may… Read More »
You may get into trouble if you didn’t remove folder synchronization on network server before deleting a user account or unlink a computer from domain… File synchronization still effective even if the user is no longer on the computer or Active Directory. The only way to get rid of old entries, is to do it… Read More »
Inside system logs (/var/log/messages), you may see some message like this on a system running a RAID controller (this one is from a PERC 5/i on a Dell PowerEdge server) : mptbase: ioc0: WARNING – IOC is in FAULT state (1600h)!!! mptbase: ioc0: WARNING – Issuing HardReset from mpt_fault_reset_work!! mptbase: ioc0: Initiating recovery mptbase: ioc0:… Read More »