We are going to use the debian package managers to install Kubectl in Ubuntu.
sudo apt-get update && sudo apt-get install -y apt-transport-https gnupg2
Example Output
Hit:1 http://in.archive.ubuntu.com/ubuntu focal InRelease Hit:2 http://dl.google.com/linux/chrome/deb stable InRelease Hit:3 http://ppa.launchpad.net/deadsnakes/ppa/ubuntu focal InRelease Hit:4 https://packages.microsoft.com/repos/ms-teams stable InRelease Hit:5 http://ppa.launchpad.net/ubuntuhandbook1/gimp/ubuntu focal InRelease Get:6 http://security.ubuntu.com/ubuntu focal-security InRelease [109 kB] Hit:7 http://archive.ubuntu.com/ubuntu focal InRelease Get:8 http://archive.ubuntu.com/ubuntu focal-updates InRelease [114 kB] Get:9 https://apt.releases.hashicorp.com focal InRelease [4,419 B] Get:10 https://apt.releases.hashicorp.com focal/main amd64 Packages [20.8 kB] Fetched 248 kB in 3s (93.0 kB/s) Reading package lists... Done Reading package lists... Done Building dependency tree Reading state information... Done apt-transport-https is already the newest version (2.0.4). The following package was automatically installed and is no longer required: libllvm10 Use 'sudo apt autoremove' to remove it. The following NEW packages will be installed: gnupg2 0 upgraded, 1 newly installed, 0 to remove and 33 not upgraded. Need to get 4,584 B of archives. After this operation, 51.2 kB of additional disk space will be used. Get:1 http://archive.ubuntu.com/ubuntu focal-updates/universe amd64 gnupg2 all 2.2.19-3ubuntu2.1 [4,584 B] Fetched 4,584 B in 1s (8,013 B/s) Selecting previously unselected package gnupg2. (Reading database ... 217875 files and directories currently installed.) Preparing to unpack .../gnupg2_2.2.19-3ubuntu2.1_all.deb ... Unpacking gnupg2 (2.2.19-3ubuntu2.1) ... Setting up gnupg2 (2.2.19-3ubuntu2.1) ... Processing triggers for man-db (2.9.1-1) ...
Example 2
> curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add - OK