After that the system will be rebooted into your new Ubuntu system.
6.3.8. Troubleshooting
The components listed in this section are usually not involved in the installation process, but are
waiting in the background to help the user in case something goes wrong.
6.3.8.1. Saving the installation logs
If the installation is successful, the logfiles created during the installation process will be automatically
saved to
/var/log/installer/
on your new Ubuntu system.
Choosing
Save debug logs
from the main menu allows you to save the log files to a floppy disk,
network, hard disk, or other (removable) media. This can be useful if you encounter fatal problems
during the installation and wish to study the logs on another system or attach them to an installation
report.
6.3.8.2. Using the Shell and Viewing the Logs
There are several methods you can use to get a shell while running an installation. On most systems,
and if you are not installing over serial console, the easiest method is to switch to the second
virtual
console
by pressing
Left Alt
-
F2
10
(on a Mac keyboard,
Option
-
F2
). Use
Left Alt
-
F1
to switch back
to the installer itself.
10. That is: press the
Alt
key on the left-hand side of the
space bar
and the
F2
function key at the same time.
76

Chapter 6. Using the Ubuntu Installer
In case switching consoles is not an option, there is also an
Execute a Shell
item on the main menu
that can be used to start a shell. You can get to the main menu from most dialogs by using the
Go
Back
button one or more times. Alternatively you can also open an additional ssh installer session
and execute the
Execute a Shell
there - see next chapter. Type
exit
to close the shell and return to
the installer.
At this point you are booted from the RAM disk, and there is a limited set of Unix utilities available for
your use. You can see what programs are available with the command
ls /bin /sbin /usr/bin /usr/sbin
and by typing
help
. The shell is a Bourne shell clone called
ash
and has some nice features like
autocompletion and history.
To edit and view files, use the text editor
nano
. Log files for the installation system can be found in
the
/var/log
directory.
Note:
Although you can do basically anything in a shell that the available commands allow you to
do, the option to use a shell is really only there in case something goes wrong and for debugging.
Doing things manually from the shell may interfere with the installation process and result in
errors or an incomplete installation. In particular, you should always use let the installer activate
your swap partition and not do this yourself from a shell.
6.3.9. Installation Over the Network
One of the more interesting components is
network-console
. It allows you to do a large part of the
installation over the network via SSH. The use of the network implies you will have to perform the first
steps of the installation from the console, at least to the point of setting up the networking. (Although
you can automate that part with
Section 4.6
.)


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- Fall '19
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