Very Useful Links for Linux
This is a collection of very useful links I’ve used on Linux.
Just Useful
digitalocean excellent tutorials:
How to Create a New Sudo-enabled User on CentOS 8 by Brian Boucheron, March 30, 2020.
How To Set Up SSH Keys by Etel Sverdlov, June 22, 2012.
Plesk and WordPress links
Step-by-Step Guide to Migrate Your WordPress Site to a New Host (January 5, 2021)
XCP-ng (Replacement for XenServer)
XCP-ng Main Site Their main site. Turnkey Open Source Hypervisor
XCP-ng documentation Their main documentation site.
Xen Orchestra The necessary client needed to manage all your XCP-ng VM appliances. Also known as XOA.
Installing Docker
How To Install Docker on CentOS 8/RHEL 8 by jon snow, on www.errorhat.com.
Steps that worked for me in installing latest Docker:
| Command line steps issued from normal sudo-er user | Description |
|---|---|
| > sudo dnf config-manager –add-repo=https://download.docker.com/linux/centos/docker-ce.repo | Install docker-ce repo |
| > dnf list docker-ce –showduplicates | sort -r | List all available docker-ce |
| > sudo dnf install https://download.docker.com/linux/centos/8/x86_64/stable/Packages/containerd.io-1.4.4-3.1.el8.x86_64.rpm | Install the latest containerd.io |
| > sudo dnf install https://download.docker.com/linux/centos/8/x86_64/stable/Packages/docker-ce-20.10.5-3.el8.x86_64.rpm https://download.docker.com/linux/centos/8/x86_64/stable/Packages/docker-ce-cli-20.10.5-3.el8.x86_64.rpm https://download.docker.com/linux/centos/8/x86_64/stable/Packages/docker-ce-rootless-extras-20.10.5-3.el8.x86_64.rpm | Install all relevant packages |
| > sudo systemctl enable –now docker | Enable and start the Docker service. The output confirms that we have created a symlink. |
| > systemctl status docker | Confirm the Docker service is active |
| > sudo usermod -aG docker $USER | Add your user to the docker group |
| > id $USER | Verify that docker group is added |
| > sudo systemctl disable firewalld | Disable firewalld for DNS resolution inside Docker containers to work. |
| Reboot your system to make sure firewalld disabled | |
| > docker pull alpine | Test docker by pulling a test container |
