Uninstalling Nessus on Linux is done as follows:

In order to determine the package name of Nessus, which is to be uninstalled, use the following commands for the different platforms:

• In Open Red Hat, CentOS, Oracle Linux, Fedora, SUSE, or FreeBSD, use the following command:

# rpm -qa | grep Nessus

• In OpenDebian/Kali and Ubuntu, use the following command:

# dpkg -l | grep Nessus

• In OpenFreeBSD, use the following command:

# pkg_info | grep Nessus

Use the package info obtained from the preceding commands as the input to the following package removal commands for the respective platforms:

• In Open Red Hat, CentOS, Oracle Linux, Fedora, or SUSE, this looks as follows:

# rpm -e <Package Name>

• In Open Debian/Kali and Ubuntu, this looks as follows:

# dpkg -r <package name>

• In Open FreeBSD, this looks as follows:

# pkg delete <package name>

Remove the Nessus directory to delete any other files present using the commands mentioned here:

• In Open Linux, use the following command:

# rm -rf /opt/nessus

• In Open FreeBSD, use the following command:

# rm -rf /usr/local/Nessus

If you face any issues during the removal of Nessus, stop the Nessus daemon and try removing the files again.

Perform the following steps to uninstall Nessus on macOS:

1. Navigate to System Preferences and select Nessus
2. Select the lock option
3. Enter the username and password
4. Select the Stop Nessus button

 Remove the following Nessus directories, subdirectories, or files:

• /Library/Nessus
• /Library/LaunchDaemons/com.tenablesecurity.nessusd.plist
• /Library/PreferencePanes/Nessus Preferences.prefPane
• /Applications/Nessus

Removal of these files will ensure that the software is completely uninstalled from the machine.