Архив на категория: Tips & Tricks

Git: Sample SSH config for multiple repos

Using multiple repos with Git (which relies on OpenSSH) terminal/CLI while keeping security a priority with separate keys requires an initial config. Here is a must-know „trick“ if you need similar setup. You will need to create a file called „config“ (yes, no file extension) in you .ssh/ folder. The sample file below provides more details.

# Alias
Host <host-name>

# Host domain or IP
HostName <host-ip/domain>

# (Optional) Username - when using SSH
User <host-username>

# Path to file identity file (i.e. private key)
IdentityFile <path-to-private-key>

In a scenario where we need access to both Gitlab and Github, an actual example would be:

# Github
Host github.com
HostName github.com
IdentityFile ~/.ssh/github_rsa

# Gitlab
Host gitlab.com
HostName gitlab.com
IdentityFile ~/.ssh/gitlab_rsa

This way when you try to execute a git pull from either GitLab or GitHub you will be using the appropriate key for the corresponding repo.


How to disable or enable Hyper-V on Windows 10 when using Docker and VirtualBox

Docker depends on Microsoft’s Hyper-V virtualization technology in order to run. VirtualBox on the other hand – doesn’t. So here are two ways to accomplish the task of enabling Hyper-V or disabling it.

Note: Either of the approaches requires restart of the machine!

1. Using Windows PowerShell (required elevated privileges)

To enable use:

Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V -All

and confirm when prompted.

To disable use:

Disable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V-All

and confirm when prompted.

2. Using the GUI

Find „Turn Windows features on or off“ in the start menu (directly type it in):
Turn Windows feature on or off dialog screenshot
and check/uncheck the „Hyper-V“ boxes depending on whether you want it enabled or disabled.

3. Alter boot configuration data (not tested on Windows 10)

You can read this article by Scott Hanselman targeting windows 8 on an approach if you need to switch you configuration on daily basis.

At the time of this writing
Docker is: v17.03 (community edition)
VirtualBox is: v5.1