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How to use SSH keys

How to create, store and connect with SSH keys.

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Secure erase an SSD

This post covers secure erasing a drive with hdparm.

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System is deadlocked on memory after Ubuntu 22.04 upgrade

Increase memory to 1GB or higher

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Install UniFi Controller on Ubuntu 20.04

This post covers adding UniFi controller software to apt

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Changing DHCP to a Static IP in Ubuntu 22.04 (netplan)

This post explains changing a netplan config from DHCP to static. You can reverse the steps to change it to DHCP.

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Permissions in Linux

More than you probably want to know about chmod.

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Change network adapter config in Ubuntu and Debian after hardware changes

This post explains updating netplan and /etc/network/interfaces configs

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Formatting and Adding a Drive in Ubuntu Linux

lsblk to find device | fdisk to create partition | mke2fs device to create filesystem | mount -av to mount without reboot

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Secure erase an NVMe drive

sudo apt install nvme-cli
sudo nvme format /dev/device -s 1

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SSH Tunnels with PuTTY

Source port is the local port you connect to.
Destination is relative to the system you’re SSHing to.