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来自 Google 的课程

System Administration and IT Infrastructure Services

1127 个评分

Google

System Administration and IT Infrastructure Services

1127 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

Software and Platform Services

In the third week of this course, we'll explore software and platform services. We'll cover what types of software and platform services you may encounter in a tech role and how to manage them. We'll learn how to configure email services, security services, file services, print services, and platform services. We'll explore ways to troubleshoot platform services and common issues to look out for. By the end of this module, you'll understand how to setup and manage the IT infrastructure services to help a business stay productive, keep information secure, and deliver applications to its users.

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与讲师见面

Google

Web servers, and servers in general, are prone to breakage,

just like any other machine.

Troubleshooting a web server can involve lots of different variables.

We won't discuss a specific troubleshooting scenario in this lesson,

but we'll talk about some easy trouble shooting tools you can

use to diagnose a faulty web server or browser called HTTP status codes.

When we want to go to Google.com our browser is sending an HTTP request

to the HTTP server on the web server.

In turn we get an HTTP response.

Sometimes this response returns the content that we want.

Almost all the time it'll return a status message of the response.

HTTP status codes are codes or numbers that indicate some sort of error or

info messages that occurred when trying to access a web resource.

Knowing common HTTP status code comes in handy when

you're troubleshooting website error.

They usually tell you useful information that can help you isolate the root cause.

Here's a common HTTP status code you might recognized.

The dreaded 404 Not Found A 404 error

indicates that the URL you entered doesn't point to anything.

Let's see what happens if I type in google.com/asdf, let's type that in.

I get this error message.

The requested URL /asdf was not found on this server.

That is exactly what I expected to happen.

I typed in an address, I knew didn't exist and the website confirmed it for me.

But, how do we know it is a 404 error code?

Depending on the website HTTP error messages could be displayed right on

the page when you try to access it.

However, to be absolutely sure you can just view the HTTP response itself.

To do that we'll have to do a bit of work.

Browsers today have built in tools that help people diagnose issues with the web

browser or website itself.

Since I'm using Chrome,

I'm going to use a Chrome Developer Tools, let me go ahead and do that.

So, I want to click on this, I get into tools.

And then click on Developer Tools.

This will open up the Developer Tools side by side to my web browser.

Developer Tools is a great resource for testing and

debugging issues with the website or browser.

We won't go through this tool, though.

If you want to learn more, you can check out the supplemental reading.

For now, we just want to see the HTTP response code.

To get to that, I'm going to go to the network type here and refresh my page.

If I'm trying to go to google.com/asdf,

I'll see the request I made in the left hand side here.

If I clicked that, I'll see the status codes says 404 not found,

pretty me, right?

HTTP status codes that start with 4xx indicate an issue on the client-side.

The client try to do something that it couldn't, like enter a bad URL.

Access something it was not authorized to do, etc.

The other common HTTP status codes that you might see start with 5xx.

These errors indicate an issue on the server-side.

The web server that hosts this web content is experiencing issues and

hopefully their server administrators are looking into it.

HTTP status codes tell us more than just errors.

They can also tell us when our request is successful,

which is denoted by the codes that begin with 2xx.

HTTP status codes can tell us a lot about an issue with a website.

If you encounter one you aren't familiar with, just look it up.

They will probably tell you exactly what the issue is.

For a list of HTTP status code, take a look at the supplemental reading.

Well, you have done it again, you have covered

a lot of information in this module about software and platform services.

You learned about IT infrastructure services that help a business stay

productive, like communication services.

You learned about security services that keep information secure between

web browsers and servers.

You also learned about platform services that are used to deliver applications to

users.

Now, you can put that knowledge to the test in a short test we've

cooked up for you.

In the next module, we'll talk about managing users, computers, and policies,

using directory services.

You're doing an awesome job, I know covered a lot but

stick with it you got this.

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