Currently the Linney IT Help Centre is only available for Linney people to raise support requests.
Click the Sign In link in the top right of the screen
You may then be prompted to enter your Linney email (if you have already signed into another Linney system on your current device these step may not be required, and you could be automatically signed in)
Enter your full Linney email (including @linney.com) and press Next
Enter your Linney password and press Sign in
Finally you will be prompted to complete your sign in by using the Linney Multi Factor Authentication (this could be via an App or Text, simply follow the instructions on screen).