Need Help Troubleshooting DevOps Tool Installation

[sharonsmith]

Hello everyone,

I am currently trying to install a set of DevOps tools on my machine, but I'm running into some issues that I can't seem to solve on my own. I'm hoping that someone here can help me troubleshoot the installation.

Here are the details of the installation:

Operating System: Ubuntu 20.04 LTS
DevOps Tools: Git, Jenkins, Docker, Ansible
Here are the issues that I'm facing:

Git: I've installed Git using the command sudo apt-get install git, but when I try to run any Git command, I get an error message saying that Git is not installed.
Jenkins: I've downloaded the Jenkins WAR file and started it using the command java -jar jenkins.war, but when I try to access Jenkins in my web browser, I get a "Connection Refused" error.
Docker: I've installed Docker using the command sudo apt-get install docker, but when I try to run the command docker ps, I get a "Permission Denied" error.
Ansible: I've installed Ansible using the command sudo apt-get install ansible, but when I try to run any Ansible command, I get an error message saying that Ansible is not installed.
I've tried searching online for solutions to these issues, but I haven't been able to find anything that works for me. If anyone has any ideas on how to solve these problems, I would really appreciate your help.

Thank you in advance!