What you’ll need The only thing you’ll need to flush the DNS cache on your Ubuntu Server is a user with sudo privileges. With that user at the ready, let’s get to the flushing. How to flush your DNS cache
How can I reboot a server with systemctl if systemctl reboot fails?
I got Failed to start reboot.target: Connection timed out for my systemctl –force rebootTo ensure that the system will reboot no matter what, I always do this sequence: This requests the kernel to do: Emergency sync of the block devicesMount
Install and Use Btrfs on Ubuntu 20.04 LTS
Btrfs (B-Tree Filesystem) is a modern copy-on-write (CoW) filesystem for Linux. It aims to implement many advanced filesystem features while focusing on fault tolerance, repair, and easy administration. The Btrfs filesystem is designed to support the requirement of high performance
Google Gmail-truc die precies laat zien waar jouw spam vandaan komt
Je kunt er waarschijnlijk weinig aan doen, maar ook jij zal vast wel eens spam-mailtjes ontvangen in Google Gmail. Gelukkig heeft de dienst een heel makkelijke oplossing om precies te zien waar deze e-mails vandaan komen. Wij leggen je uit
Set default sound card in Pulse Audio
If you have more than one soundcard the default one that Ubuntu chooses is not always the one you want. Here is how to change that in the GUI or command-line. With the pavucontrol App Install pavucontrol (apt install pavucontrol)
Testing your Mailserver
Is your mailserver on al blacklist? Multi DNS BlackList aka RBL lookup and Forward Confirmed reverse DNS aka iprev check toolhttps://multirbl.valli.org/lookup/ Do your Spamhaus Blocklist work?Spamhaus Blocklist Testerhttps://blt.spamhaus.com/
How to Clone Hard Disks with ddrescue
When a hard drive starts to fail, you have a limited amount of time to take action, and many online tutorials recommend making a clone of the affected disk before it becomes completely unresponsive. At Datarecovery.com, we recommend contacting a
How to enable KVM virsh console access
Requirements The virtual machine must have the pty configured. From the KVM server edit the domain and make sure there is this section: From KVM Server sudo virsh edit virtual-machine <serial type=’pty’> <source path=’/dev/pts/0’/> <target type=’isa-serial’ port=’0′> <model name=’isa-serial’/> </target>
Netplan configuration examples
Below are a collection of example netplan configurations for common scenarios. If you see a scenario missing or have one to contribute, please file a bug against this documentation with the example using the links at the bottom of this
KVM: Start a Virtual Machine / Guest At Boot Time
There are various ways to start virtual machines at at boot time. This means you don’t have to type virsh start vmName command. This can be done by marking a vm as autostart. To configure a domain to be automatically