VPN: added Global Protect

wiki/linux/papis.md

@@ -6,7 +6,10 @@ for LaTeX using the BibTeX format.
 
 ## Setup
 
-Papis can be installed on most distributions by acquiring the `papis` package.
+Papis can be installed on most [Linux](/wiki/linux.md) distributions by acquiring the `papis`
+package.
+On some distributions there may be problems installing this from the official repository.
+Another option to install papis is to use [pip](/wiki/programming_languages/python.md).
 Alternatively it can be downloaded from [the GitHub page](https://github.com/papis/papis).
 
 ### Configuration

wiki/vpn.md

@@ -15,3 +15,4 @@ This section lists various VPN implementations.
 - [OpenVPN](/wiki/openvpn.md) is probably the most well known VPN implementation.
 - [WireGuard](/wiki/wireguard.md) is a modern, fast and secure implementation of the VPN protocol.
   It is free and open-source.
+- Global Protect is a proprietary VPN that is mostly used by corporation and learning facilities.