How to Add Vala Repo on Ubuntu-Based Systems

Setting Up Repo

2. 2. Adding Vala Repo

   Then to Add Vala Repository for Ubuntu
   Execute:

   sudo add-apt-repository ppa:vala-team/ppa

   Authenticate with the User’s Admin Pass.
   If Got “User is Not in Sudoers file” then see: How to Enable sudo.

3. 3. Refreshing Ubuntu Repo Sources

   Next to Refresh Ubuntu Apt Repository Sources
   Needed for most Ubuntu derivatives:

   sudo apt update

   Authenticate with the User Admin Pass.
   If Got “User is Not in Sudoers file” then see: How to Enable sudo.