AppDynamics - Agent upgrade - devops

What are the steps to install machine agent and java app agent in linux machine for app dynamics.
I tried based on the steps given on appd official documents.

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Jenkins iOS pipeline

I have Jenkins server already running on linux (k8s) and I have pipeline for various different builds like k8s, Android (fastlane). Now I want to create iOS pipeline on Jenkins to build and publish my app to TestFlight/AppStore/Distribute, I want to know that is this possible?

Understanding Jenkins plugins and agent

I was trying to understand jenkins agents. This page asks to first create jenkins docker agent. But it doesnt say where to execute these steps?
Q1. Should we be executing these steps on node or a machine which we want to designate as agent?
The next step asks to setup an agent through Jenkins UI:
Q2. Above is nothing but the Jenkins controller UI right?
But above UI does not seem to accept IP address of the agent node on which we staarted docker agent.
Q3. Does Jenkins controller automatically discovers running agents reachable on the network?
Q4. What are exactly Jenkins plugins in relation with agents? Jenkin glossary defines plugin as "an extension to Jenkins functionality provided separately from Jenkins Core." But that does not explain much of its nature or functionality. This page also explain plugin installation and management on the controller, but doesnt explain exact nature of their functionality.
Q4.1. Do plugins run jobs of agent nodes? For example, does Android Emulator plugin installed on controller installs and runs android emulator on available agent?
Q4.2. If yes is the answer to Q4.1, does every plugin need corresponding process to be installed on the agent so that agent can carry out functionality specified in the pluin on the controller?
PS: Am a noob in Jenkins and overall DevOps stuff and just trying to wrap my head around Jenkins

Is it possible to run an Azure pipeline agent for build iOS app on Linux?

I have created a self hosted agent pool. It gives three options for OS. I want to run xcodebuild on the pipeline, which currently I using the Microsoft hosted agent. Is it possible to connect a self hosted agent running on Linux to the pipeline and run Xcode build? Or should I require a mac machine to run the agent?
basically boils down to: "can you run xcode on linux". No, you cant.
also, according to apple eula you need to run macos on mac hardware.

steps to integrate chef with jenkins

As I am new to chef with Jenkins, please let me know what are the steps to integrate Jenkins with Chef. I have installed "chef tracking plugin" and "Deployment Notification Plugin". And I don't know further steps. Chef client resides in remote (Linux OS) and jenkins in local (Windows 7).
I have gone through this link.
But found nothing. Any Help would be appreciated.

Jenkins building on a remote machine

I can only build my system on a FreeBSD 5 machine.
I am looking and introducing gerrit and Jenkins into my team.
I have setup the server running gerrit and Jenkins both on a Debian machine for now.
What is the standard way of dealing with Jenkins building on a remote server?
The standard way would be to install a Jenkins Slave on the remote server. See https://wiki.jenkins-ci.org/display/JENKINS/Distributed+builds
You then setup the job that must be built on a FreeBSD 5 machine, to only only run on that slave/node. This is can be achieved within the job configuration by specifying the FreeBSD machine by name.
If you don't want other Jenkin jobs to run on that FreeBSD machine, you can configure the slave to only run jobs that are tied to it. See step 4 in the JENKINS Step by step guide to setup master and slave machines for the config page that you need to do this.

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