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15.10 What is Rescue Mode? 215

Your system’s diskette drive should start writing to the diskette. After a minute or so, the dd com-

mand will complete, and you’ll get your shell prompt back.

Wait for your diskette drive’s access light to go out, and that’sit!

You now have a rescue disk set. Label this diskette something like “Red Hat Linux 6.0 rescue

diskette” and store it someplace safe.

Let’s hope you never have to use it.

If you should ever need to use rescue mode, here’show.

Boot your system with the boot diskette in the ﬁrst diskette drive. At the LILO Boot: prompt, enter

the word rescue. You will see the usual kernel messages as the Linux kernel starts up.

Eventually, it will ask you to insert the next diskette, and press

Enter . Remove the boot diskette,

insert the rescue diskette, and press

Enter .

The rescue diskette will be read into memory. After a minute or so, you should see the shell prompt.

That’sit– you’re in rescue mode!

Now what?

When it comes to rescue mode, that’s a bit like asking, “how long is a piece of string?” What you

require depends a great deal on what your system’s problem is, your level of Linux expertise, and

several variables we haven’t even thought of yet. So we can’t give you explicit instructions.

But we can tell you what programs you have access to while in rescue mode.

Here’s the list:

badblocks bash bzip2

cat chmod chroot

cp cpio dd

e2fsck fdisk grep

gunzip gzip head

ifconfig init ln

ls lsmod mkdir

mke2fs mknod mount

mt mv open

pico ping ps

restore rm route

rpm sed sh

swapoff swapon sync

tac tail tar

traceroute umount vi

vim

You’re likely to be unfamiliar with most, if not all of these commands. However, the commands

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