Recent experience with an Aquantia AQtion AQC108 5G network card that was integrated in a motherboard (Supermicro X11SRA-F). Plugging in an ethernet cable would not activate the port (status LEDs would not light up on either the NIC or the switch), so the NIC appeared dead. However when booting into ESXi 6.7 the NIC would be detected as AQC108 NBase-T/IEEE 802.3bz Ethernet Controller [AQtion] but not be listed under Networking – Physical NICs indicating that no driver was found. Turns out this NIC needs an OS that has a driver installed before the LEDs will activate. For example with the ESXi host machine the NIC was set up as Passthrough to a guest running Windows Server 2019 (which has the drivers built in). The link LEDs then began working and the NIC functioned normally in the Windows guest.
Upgraded a Supermicro CSE-836 from 3 pin fans to 4 pin PWM fans. Here is the before and after matrix of part numbers:
|Middle Fans (Qty 3)
San Ace 80 9G0812G103
|Rear Exhaust Fans (Qty 2)
San Ace 80 109p0812c2041
|Middle Fans (Qty 3)
San Ace 80 9G0812P1G09
|Rear Exhaust Fans (Qty 2)
San Ace 80 109P0812P2C031
|Hot swap cables 4 pin to 4 pin (Qty 5)
Note: the above matrix was for replacements in kind. The latest CSE-836 has these fans:
Middle: FAN-0126L4 (Qty 3)
Rear: FAN-0125L4 (Qty 2)
Note: an alternative 4 pin hot swap cable is CBL-0216L
When trying to update/upgrade ESXi 6.7.0 Update 3 (via software profile update command) you may run into the following error below. This was a host running specifically Update 3 build 15018017 trying to update to build 15160138.
[Errno 28] No space left on device
vibs = VMware_locker_tools-light_22.214.171.12473994-15160134
Please refer to the log file for more details.
When attempting to update to build 16075168, the failure is related to: vibs = VMware_locker_tools-light_126.96.36.19989592-15999342, you can substitute this version into the commands below, keeping everything else the same.
First make sure you have Swap enabled on a datastore. In vSphere Web Access, navigate to Host->Manage->Swap and choose a datastore.
Then manually install the VMware_locker_tools package by following these steps via SSH on the host:
esxcli software vib install -f -v /tmp/VMware_locker_tools-light_188.8.131.5273994-15160134.vib
Once you receive verification that the Operation finished successfully, try the profile update command again to patch ESXi.
When trying to update a CentOS 7 system after an extended amount of time, I ran into this error:
warning: /var/cache/yum/x86_64/7/ius/packages/yum-plugin-replace-0.2.7-1.ius.el7.noarch.rpm: Header V4 RSA/SHA256 Signature, key ID 4b274df2: NOKEY
Retrieving key from file:///etc/pki/rpm-gpg/IUS-COMMUNITY-GPG-KEY
The GPG keys listed for the “IUS Community Packages for Enterprise Linux 7 – x86_64” repository are already installed but they are not correct for this package.
Check that the correct key URLs are configured for this repository.
Failing package is: yum-plugin-replace-0.2.7-1.ius.el7.noarch
GPG Keys are configured as: file:///etc/pki/rpm-gpg/IUS-COMMUNITY-GPG-KEY
In this example I was trying to install the package yum-plugin-replace, but a similar error can occur with other packages you may have installed as well. The solution was to reinstall the IUS repository (https://ius.io/setup)
sudo yum install \
Once complete retry the update
sudo yum update
At which point you may run into the below message. The fingerprint should match https://ius.io/keys, then type Y to finish.
Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-IUS-7
Importing GPG key 0x4B274DF2:
Userid : “IUS (7) <[email protected]>”
Fingerprint: c958 7a09 a11f d706 4f0c a0f4 e558 0725 4b27 4df2
Package : ius-release-2-1.el7.ius.noarch (installed)
From : /etc/pki/rpm-gpg/RPM-GPG-KEY-IUS-7
Is this ok [y/N]:
For Windows Server 2012 R2 it’s not possible to change the alias of an existing RemoteApp. However it is possible to set a custom alias when creating a new RemoteApp using PowerShell. The steps:
- Unpublish the existing RemoteApp
- Start PowerShell
- Issue the following command to publish the new app with your desired alias. Note that folder name is optional. The collection name you can find in Server Manager under Remote Desktop Services -> Collections
New-RemoteApp -CollectionName “YourCollectionName” -Alias “YourAlias” -DisplayName “YourDisplayName” -FolderName “YourFolderName” -FilePath “C:\path\to\executable.exe”
When attempting to change the timezone in Windows Server 2019 you may run into the following problems:
- The change button in Windows Settings for Date & Time is greyed out
- Receive an error message when clicking Change Time Zone button in Control Panel Date and Time, even though you are an administrator:
Unable to continue
You do not have permission to perform this task. Please contact your computer administrator for help.
The solution is to force the Control Panel Date and Time applet to run separately with administrator privileges:
- Click Start
- Type timedate.cpl
- Right click on the resulting Control panel item
- Choose Run as administrator
- Now you can adjust the time freely
On a Ubuntu 18.04 bionic system I suddenly started getting errors with certbot for one domain while certificates for other domains on the same system were renewing without errors. Performing a –dry-run would result in various error messages, such as:
DNS problem: SERVFAIL looking up CAA for …
Remote PerformValidation RPC failed
Unfortunately, an error on the ACME server prevented you from completing authorization. Please try again later.
Running certbot renew with the additional flag –debug-challenges and inspecting the letsencrypt.log revealed the following:
Invalid Content-Type header on POST. Content-Type must be “application/jose+json”
The solution was to simply update certbot on the system
sudo apt-get update
sudo apt-get upgrade
I had a situation where the Delete button was grayed out / disabled when attempting to delete a user account on a Windows 7 machine. This occurred when logged in with an account with full administrator privileges. The solution was to first navigate to the c:\Users\folder, find the desired user’s folder and try to enter it. Windows should then prompt you:
You don’t currently have permission to access this folder. Click Continue to permanently get access to this folder.
Once that is complete and you can access the folder, you should then be able to go back to Advanced System Settings and delete the user profile.
If you still have the issue, make sure your account has full administrative privileges (e.g., if you had to elevate your domain account) and then reboot the system.