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- Hi, welcome to Lesson 7.

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If ever your Linux system gets in trouble,

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it is very useful to know
exactly what's happening

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in the Linux boot procedure,

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and that's exactly what we are
going to do in this lesson.

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I'll start by explaining
the boot procedure

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after which you'll learn how
to manage systemd targets.

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Next, I'll show you how to pass parameters

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on the GRUB boot prompt

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and you'll learn how to edit

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GRUB configuration persistently.

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We'll also have a look at legacy booting

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as managed by init and upstart.

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The last part of this lesson
is about troubleshooting.

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I'll show you when to use

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which specific troubleshooting approach,

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and you'll learn how to
boot from a rescue disk.

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This lesson ends with a lab

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that helps you practice
your troubleshooting skills.