Let’s try this out by installing Snort on your system. Enter apt-get

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Removing Software

41
Let’s try this out by installing Snort on your system. Enter
apt-get
install snort
as a command statement, as shown in Listing 4-2.
kali >apt-get install snort
Reading package lists... Done
Building dependency tree
Reading state information... Done
Suggested packages:
snort-doc
The following NEW packages will be installed:
snort
--snip--
Install these packages without verification [Y/n]?
Listing 4-2: Installing Snort with apt-get install
The output you see tells you what is being installed. If everything looks
correct, go ahead and enter
y
when prompted, and your software installa-
tion will proceed.
Removing Software
When removing software, use
apt-get
with the
remove
option, followed by the
name of the software to remove (see Listing 4-3).
kali >apt-get remove snort
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer
required:
libdaq0 libprelude2 oinkmaster snort-common-libraries snort-rules-default
--snip--
Do you want to continue [Y/n]?
Listing 4-3: Removing Snort with apt-get remove
Again, you’ll see the tasks being done in real time and you will be
asked whether you want to continue. You can enter
y
to uninstall, but you
might want to keep Snort since we’ll be using it again. The
remove
command
doesn’t remove the configuration files, which means you can reinstall the
same package in the future without reconfiguring.
If you do want to remove the configuration files at the same time as the
package, you can use the
purge
option, as shown in Listing 4-4.
kali >apt-get purge snort
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
libdaq0 libprelude2 oinkmaster snort-common-libraries snort-rules-default

42
Chapter 4
--snip--
Do you want to continue [Y/n]?
Listing 4-4: Removing Snort and the accompanying configuration files with apt-get purge
Simply enter
Y
at the prompt to continue the purge of the software
package and the configuration files.
You may have noticed the line
The following packages were automatically
installed and are no longer required
in the output. To keep things small and
modular, many Linux packages are broken into software units that many
different programs might use. When you installed Snort, you installed sev-
eral dependencies or libraries with it that Snort requires in order to run.
Now that you’re removing Snort, those other libraries or dependencies are
no longer required, so they can be removed by running
apt autoremove
.
kali > apt autoremove snort
Reading Package lists...Done
Building dependency tree
Reading state information ...done
--snip--
Removing snort-common-libaries (2.9.7.0-5)...
Removing libdaq2 (2.04-3+b1) …
Removing oikmaster (2.0-4)
--snip--

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