Category Archives: Operating Systems

Linux : How to change default route metric

Under some rare circumstances, you may require to change the default route metric. The first way of doing should be through the “ifcfg-ethX” configuration file by adding the “METRIC=” statement. However it has been found to be inefficient for me and had to apply it using “ip route” as followed :

ip route del default via <your.default.gateway.ip> dev <interface> proto static metric <current.metric>
ip route add default via <your.default.gateway.ip> dev <interface> proto static metric <new.metric>

1 2	ip route del default via <your.default.gateway.ip> dev <interface> proto static metric <current.metric> ip route add default via <your.default.gateway.ip> dev <interface> proto static metric <new.metric>

Example :

ip route del default via 1.2.3.4 dev eth0 proto static metric 100
ip route add default via 1.2.3.4 dev eth0 proto static metric 90

1 2	ip route del default via 1.2.3.4 dev eth0 proto static metric 100 ip route add default via 1.2.3.4 dev eth0 proto static metric 90

Windows : Failed to boot blue screen VOLMGRX INTERNAL ERROR

If your Windows 10 system suddenly stopped booting and show the following error message : VOLMGRX INTERNAL ERROR It most likely mean that your software RAID volume has failed. It may indicate a hardware underlying issue, such as a failed drive or the mirror just broke and is no longer in sync. To find out,… Read More »

Linux : WARNING URLGET set to use LWP but perl module is not installed, reverting to HTTP::Tiny

If you’ve noticed the following error message while starting CSF Firewall, it means that you are missing Perl modules on your system in order to fully take advantage of the capabilities of CSF. *WARNING* URLGET set to use LWP but perl module is not installed, reverting to HTTP::Tiny In order to install the missing Perl… Read More »

Linux : Copy/Paste not working between VMware Workstation host and Debian guest

If you are wondering why copying text from your VMware Workstation host to your Debian guest VM isn’t working, it is most likely because you either do not have the virtualization tools installed or have the wrong one installed. VMware does provide what is commonly called “VMware Tools”, however those need to be compiled from… Read More »

Windows : Prevent Server Manager from opening at logon

As much as I love Windows Server 2016 compared to previous versions, there is nothing that annoy me more that the Server Manager opening when I logon. Fortunately, there is a way to disable it using Group Policy editor. NOTE : If you are not within a domain group environment (Active Directory), there is an… Read More »

Linux : apt-get Failed to fetch FailReason: ConnectionRefused

Experiencing the following issue trying to update your Debian distro using apt-get? # apt-get update Ign:1 http://deb.debian.org/debian stretch InRelease Hit:2 http://deb.debian.org/debian stretch Release Ign:3 http://repo.r1soft.com/apt stable InRelease Hit:4 http://repo.r1soft.com/apt stable Release Hit:5 http://security.debian.org/debian-security stretch/updates InRelease Ign:8 https://download.webmin.com/download/repository sarge InRelease Hit:9 https://download.webmin.com/download/repository sarge Release Err:11 https://packages.sury.org/php stretch InRelease FailReason: ConnectionRefused Reading package lists… Done W: Failed… Read More »

Windows : Show available memory with PowerShell

Here is the command how to show the available system memory on Windows with PowerShell command :

(systeminfo | Select-String 'Total Physical Memory:').ToString().Split(':')[1].Trim()

1	(systeminfo \| Select-String 'Total Physical Memory:').ToString().Split(':')[1].Trim()

Example :

PS C:\Users\user> (systeminfo | Select-String 'Total Physical Memory:').ToString().Split(':')[1].Trim()
32,767 MB

1 2	PS C:\Users\user> (systeminfo \| Select-String 'Total Physical Memory:').ToString().Split(':')[1].Trim() 32,767 MB

Windows : Multiple connections to a server or shared resource by the same user, are not allowed

Having this error message when you login your Windows session : An error occurred while reconnecting X: to \\server-name\x$ Microsoft Windows Network: Multiple connections to a server or shared resource by the same user, are not allowed. Disconnect all previous connections to the server or shared resource and try again. This connection has not been… Read More »

Linux : How to install same package version between old and new RHEL/CentOS system

I recently had to provision a RedHat Enterprise Linux 6 system for a customer that owned a production system that I have provisioned four years ago. The new system requirement was to match the same package version as the old system (that they left un-updated since the deployment – fortunately for them it was an… Read More »

Windows : List logged-in users and kill session using command line

In some circumstances where you cannot use (or open) the task manager panel to see the logged in users on a system and need to terminate a opened session, you might need to know your way around the CLI to achieve this task. Those simple steps will show you how. 1. Open the Command Prompt… Read More »