Using “screen” on Linux to perform your important work? Way to go, SysAdmin 🙂 Then you might at some point encountered the following behavior – while attempting to resume a session using “screen -r”, the following message occurred : There is a screen on: 1610.pts-0.host (25/08/18 08:25:36 PM) (Attached) There is no screen to be… Read More »
Similar as what you can do on linux with the Message Of The Day (MOTD), there is a way to display a message to users when they login to their session. Microsoft refer to this as a “legal notice” and can be achieved through the registry. 1. Open the Windows Registry Editor with elevated privileges… Read More »
The easiest way to get hardware serial and related information is using “dmidecode“. The command below should give you exactly what you need :
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dmidecode -s system-serial-number |
The command above does not usually work with “clone” computers/servers. Alternatively, you may use the command below, which will output all parts serial number availables :
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dmidecode | grep "Serial Number:" |
This tutorial will show you the simple steps to upgrade your Ubiquiti Unifi SDN Controller running on Windows. The software can be found on the manufacturer Web site (https://www.ubnt.com/download/unifi). We recommend using the LTS (Long Term Support) version unless you need the bleeding edge features. Upgrading to newer version might not allow downgrade in case of… Read More »
I was a bit stunned when I attempt to deploy the vSphere Replication Appliance on a new v6.7 cluster. The Next button on the very first page where you select the template files just never turned blue (it always stayed grey) after selecting the files, just like if I did not selected all the files… Read More »
Here is a simple PowerShell command that will output the FC host adapter interface WWNs.
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Get-WmiObject -class MSFC_FCAdapterHBAAttributes -namespace "root\WMI" | ForEach-Object {(($_.NodeWWN) | ForEach-Object {"{0:x}" -f $_}) -join ":"} |
If your interface have two ports, both will be output in order. This command have been successfully tested with QLogic adapters on Windows 2012 and 2016.
Here is some useful commands to display a domain Time To Live (TTL) using the DIG command (which is usually included within “bind-utils” package). To display the full information :
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dig +nocmd +multiline +noall +answer any domain.tld |
To display the short, default answer :
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dig +nocmd +noall +answer domain.tld |
NOTE : Replace “domain.tld” by the domain you want to query.
If you are not satisfied with the refresh rate of DNS within your active directory environment, there is a way of forcing it by increasing or decreasing the default setting in the registry. First of all, there is a command to find out your curent settings :
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dnscmd /info /dspollinginterval |
It should output something similar to :… Read More »
Experiencing the following alarm event log on your Juniper EX switch? Alarm time Class Description 2016-01-20 07:12:04 UTC Major Upgrade bank is empty or corrupted for FPC 0, please do standard upgrade sequence This is likely because your switch was running an inferior JunOS version than 10.4r3 and it was upgraded to a greater version,… Read More »
Here is some useful commands to list the members of a group in Active Directory using PowerShell. Get members of a group :
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Get-ADGroupMember -Identity "Groupe Name" |
Get members of a group, recursively (to list all members of sub-groups members of that group) :
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Get-ADGroupMember -Identity "Group Name" -Recursive |
NOTE : Replace “Group Name” (keeping the double quotes) with the desired Group… Read More »