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In some documentation, you may see the command <code>su -</code> used in place of <code>su</code>. The dash argument causes <code>su</code> to go through the steps that would normally be performed when the root user logs in, including (1) running the startup scripts (such as<code>/etc/profile</code> and <code>/root/.bash_profile</code> and (2) changing to the root user's home directory (<code>/root</code>).
Note that the root user's home directory (<code>/root</code>) is ''not'' the same as the root directory of the system (<code>/</code>). It is also in a different directory than the rest of the home directories, which are typically in <code>/home</code> -- the reason for this is that <code>/home</code>is sometimes on a network filesystem shared by another server (as is the case on Matrix), and it's important that the system administrator be able to log in to the system even if the network is not operating normally.
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Navigate through your Graphical Fedora system, '''locate and run a terminal program (in order to issue Linux commands). Issue and record the commands used and the output generated in each of the following steps:'''
# The name of the installation log file is <code>/root/install.log</code> -- It is an ASCII file (how can you be sure?) and which can be viewed with the <code>less</code> command.
# You can make use of this file to determine how many packages have been installed: complete the following command to count the number of packages listed in the installation log file:
:: <code>grep ________________ /root/install.log | wc -l</code>
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{{Admon/tip |Updating Fedora|The Fedora 16 software is updated frequently to add features, fix bugs, and upgrade security. '''Perform a system update to get the latest versions of the packages installed in Fedora: Start the Firefox web browser, turn off popup window blocking (select ''Edit>Preferences'', then select the Content tab and uncheck the box to Block Popups), then login to SeneNET. Open a terminal and type <code>su</code> to start a shell as root. Enter the command <code>yum update</code> ''' This will download and install all of the packages that have been updated since the installation DVD image was created. If you complete this command at Seneca it should run quite fast as Seneca College hosts a Fedora Repository mirror (a copy of all of the current fedora packages, on a local web server).}}
'''Answer the Investigation 2 observations / questions in your lab log book.'''