General

When using self-signed certificates you might come across the following error: > "javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target" To solve…

There are a couple of ways to ensure that all non-secure connections  (HTTP) are forced to use a secure connection (HTTPS). The simplest of which is to go the root…

If you're struggling to install fail2ban and being notified that the package cannot be found, you simply need to enable the universe repository and update the package list. sudo add-apt-repository…

For some reason compatibility issues arise with the latest version of Thunderbird and the Lightning calendar plugin. To resolve this you can follow these steps: Uninstall the Lightning add-on Exit…

Start by going to your home directory: cd ~ Next, spin up the Consul Docker container with the following command: docker run -d -v $PWD/consul/data/:/consul/data/ -v $PWD/consul/config/:/consul/config/ -e 'CONSUL_LOCAL_CONFIG={"skip_leave_on_interrupt": true,…

You might receive this message after upgrading UNMS. To resolve, simply run the following 3 commands: sudo ~unms/app/unms-cli stop sudo ~unms/app/unms-cli fix-redis-aof sudo ~unms/app/unms-cli start

Assuming you have a static IP you'd like to map to an internal IP with all the ports open, then you'd need a 1:1 NAT. This is straightforward to setup…

To change the IP of one of your Proxmox nodes, you can start by clicking on the node whose IP you want to change, click on Network, and change the…

The system monitor and calculator apps are installed with snap in Ubuntu 18.04 and from time to time you might find you won't be able to open these apps. To…

Sometimes you might create a new user without specifiying the necessary arguments, resulting the shell for that user being something other than the default bash shell you're used. This often…