Servers Revisited

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来自 Google 的课程

System Administration and IT Infrastructure Services

1756 个评分

Google

System Administration and IT Infrastructure Services

1756 个评分

课程 4（共 5 门，Specialization Google IT Support Professional Certificate）

This course will transition you from working on a single computer to a whole fleet. Systems administration is the field of IT that’s responsible for maintaining reliable computers systems in a multi-user environment. In this course, you’ll learn about the infrastructure services that keep all organizations, big and small, up and running. You’ll learn how to manage and configure servers, how to use industry tools to manage computers, user information, and user productivity. Finally, you’ll learn how to recover your organization’s IT infrastructure in the event of a disaster. By the end of this course you’ll be able to: - utilize best practices for choosing hardware, vendors, and services for your organization. - understand how the most common infrastructure services that keep an organization running work and how to manage infrastructure servers. - manage an organization’s computers and users using the directory services, Active Directory, and OpenLDAP. - choose and manage the tools that your organization will use. - backup your organization’s data and be able to recover your IT infrastructure in the case of a disaster. - utilize systems administration knowledge to plan improve processes for IT environments. Except as otherwise noted, the contents on this site are licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

从本节课中

What is System Administration?

Welcome to the System Administration course of the IT Support Professional Certificate! In the first week of this course, we will cover the basics of system administration. We'll cover organizational policies, IT infrastructure services, user and hardware provisioning, routine maintenance, troubleshooting, and managing potential issues. By the end of this module, you will understand the roles and responsibilities of a System Administrator. So let's get started!

What is Systems Administration?2:35

Servers Revisited4:23

与讲师见面

Google

Basically, a sysadmin is responsible for their company's I.T.

services. Employees need these I.T.

services so that they can be productive.

This includes things like email,

file storage, running a website and more.

The services have to be stored somewhere,

they don't just appear out of nowhere.

Any thoughts on where they're stored?

If you answered servers, you're correct.

We talked about servers in an earlier course and you've

learned that the term servers can have multiple meanings.

In one course we discussed how servers have

web content that they serve to other computers.

In another course, we talked about how servers can

be software that perform a certain function.

In this video, we're going to talk about servers more in-depth because,

in many cases sysadmins are responsible for maintaining all of the company's servers.

If you're working as an I.T.

support specialist and have systems administration responsibilities,

these tasks could be something you'll perform.

A server is essentially software or

a machine that provides services to other software or machines.

For example, a web server stores and serves content to clients through the Internet.

You can access the web server through a domain name like google.com.

We'll dive deeper into web servers in a later course.

Right now, let's run down some other examples of servers.

An email server, provides email service to other machines.

And an SSH server provides SSH services to other machines and so on and so forth.

We call them machines that use the services provided by a server, clients.

Clients request the services from a server and in turn,

the servers respond with the services.

A server can provide services to multiple clients

at once and the client can use multiple servers.

Any computer can be a server.

I can start up a web server on my own home computer

that would be able to serve my own personal website on the internet for me.

But, I don't really want to do that because I have to leave my computer

on all the time in order for my website to be available all the time.

Industry Standard Servers are typically running

24 seven and they don't run dinky little hardware like my home laptop.

They run on a really powerful and reliable hardware.

Server hardware can come in lots of different forms.

They can be towers that sit upright,

they look very similar to the desktops we've seen.

Those towers can be put in a closet or can sit on the table if you want them to.

But, what if you needed to have 10 servers?

The towers would start taking up way too much space.

Instead, you can use rack servers which lay

flat and are usually mounted in a 90 inch wide server rack.

If you needed even more space,

you could use blade servers that are even slimmer than racks.

There are other types of form factors for servers but these are the most common ones.

You can also customize the hardware on your servers depending on the services.

For example, on a file server you'll

want more storage resources so that you can store more files.

What about connecting to our servers?

Working in a small IT organization,

you could potentially deal with a handful of servers.

You don't want to have a monitor, keyboard and a mouse for each of these servers, do you?

Fortunately, you don't have to thanks to something we learned in an earlier course.

We can remotely connect to them with something like SSH.

Even so, you should always have a monitor keyboard on hand.

Sometimes when you're working your network might

be having issues and SSH won't be an option.

A common industry practice is to use something known as a KVM Switch.

KVM stands for keyboard, video and mouse.

A KVM Switch looks like a hub that you can connect

multiple computers to and control them using one keyboard, mouse and monitor.

You can read more about using KVMs in the next supplemental reading.

Now though we've got a better understanding of servers and what they do,

you can go out and start buying

server hardware and setting up services for your organization.

Or maybe not.

You don't actually have to buy

your own server hardware or even maintain your own services.

In the next video, were going to learn about a wave of

computing that started to overtake the IT world,

cloud computing. See you there.

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