Find and unmount CD drives with PowerCLI

Sometimes someone forgets to unmount the CD drive of a VM. This will interfere with operation tasks like setting a host in maintenance mode or using Update Manager. I recently had this issue, and the “update manager compliance check” told me that several VM’s where connected to a CD drive, which may interrupt the update…

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Move the docker data directory

The default location for the docker data directory, when using overlay2 storage driver is /var/lib/docker. Maybe you want to move it to another location, and it’s actually pretty easy. Stop the docker service: sudo systemctl stop docker.service Copy the docker folder to the new location:sudo cp -rp /var/lib/docker /path/to/new/locationThe p in -rp will preserve ownership,…

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Windows 10 missing ssh-copy-id

Microsoft is finally shipping Windows with SSH. On my Windows 10 machine, it’s OpenSSH: PS C:\Users\Kasper> ssh -VOpenSSH_for_Windows_7.7p1, LibreSSL 2.6.5 Somehow they missed to get the ssh-copy-id tool implemented, so we need to find another way of copying our ssh keys. Thankfully it’s not that complicated, we can use powershell (probably even cmd) cat .\.ssh\id_rsa.pub…

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Postgresql not listening on docker interface after reboot

/etc/postgresql/12/main/postgresql.conf is where you define the interfaces for postgresql to listen on. It’s done with the line “listen_interfaces =”So, to get postgresql to listen on a docker interface, you have to add the IP address to the configuration: This will make postgresql listen after connections from my docker container. Unfortunately when i rebooted the machine,…

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Ping not permitted in WSL

Using Windows subsystem for Linux (WSL) is so nice, when you are forced to work from an inferior OS, sometimes also referred to as “a gaming console”Especially combined with the Windows Terminal, which I wrote about here: https://www.nordal-lund.dk/?p=592 I’m sure that most Linux/Unix administrators will feel right at home. Despite all the goodness, there are…

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