updated install docs

docsrc/installation.rst

@@ -28,7 +28,7 @@ Virtual Machine
 
 P4-Utils can run in a virtual machine to keep its environment separated from the rest of the system.
 Moreover, since P4-Utils is only available on Linux, other OS users can run it in a linux VM.
-We provide two different solutions for the P4-Utils VM and both are supported by a wide range of 
+We provide two different solutions for the P4-Utils VM and both are supported by a wide range of
 operating systems:
 
 - VirtualBox_
@@ -100,9 +100,13 @@ To download our preconfiugred VMs, please click on the folllwing links:
 
   `VirtualBox VM (unavailable)`__
 
+- __ https://polybox.ethz.ch/index.php/s/QlrfHm7uYw6vISe
+
+  `QEMU VM (Ubuntu 20/compressed)`__
+
 - __ https://polybox.ethz.ch/index.php/s/9orcmetpNxOAhlI
 
-  `QEMU VM`__
+  `QEMU VM (old ubuntu 18 vm)`__
 
 Manual Installation
 -------------------
@@ -127,13 +131,13 @@ P4-Utils depends on the following programs in the given order:
 
 1. __ https://github.com/p4lang/PI
 
-   `PI LIBRARY REPOSITORY`__ provides an implementation framework 
+   `PI LIBRARY REPOSITORY`__ provides an implementation framework
    for a P4Runtime server. **It is required only for topologies with
    P4Runtime switches.**
 2. __ https://github.com/p4lang/behavioral-model
-  
+
    `BEHAVIORAL MODEL (bmv2)`__ contains the software implementation several
-   variations of the behavioral model (e.g. ``simple_switch`` and 
+   variations of the behavioral model (e.g. ``simple_switch`` and
    ``simple_switch_grpc``).
 3. __ https://github.com/p4lang/p4c
 
@@ -145,10 +149,10 @@ P4-Utils depends on the following programs in the given order:
    kernel, switch and application code, on a single machine (VM, cloud or native).
 5. __ https://github.com/FRRouting/FRR
 
-   `FRRouting`__ is a free and open source Internet routing protocol suite 
-   for Linux and Unix platforms. It implements BGP, OSPF, RIP, IS-IS, PIM, 
-   LDP, BFD, Babel, PBR, OpenFabric and VRRP, with alpha support for EIGRP 
-   and NHRP. Router nodes in P4-Utils are based on FRRouting. **It is required 
+   `FRRouting`__ is a free and open source Internet routing protocol suite
+   for Linux and Unix platforms. It implements BGP, OSPF, RIP, IS-IS, PIM,
+   LDP, BFD, Babel, PBR, OpenFabric and VRRP, with alpha support for EIGRP
+   and NHRP. Router nodes in P4-Utils are based on FRRouting. **It is required
    only for topologies with routers.**
 
 __ https://github.com/nsg-ethz/p4-utils/blob/master/install-tools/install-p4-dev.sh
@@ -158,18 +162,18 @@ dependencies that are needed by P4-Utils. For this reason, we provide a `Bash
 script`__ that automatically goes through every step.
 
 .. Warning::
-    The script has been tested with **Ubuntu 18.04.4** and the compiler 
-    **GCC 7.5**. Errors have been reported with newer versions.
+    The script has been tested with **Ubuntu 20.04 and Ubuntu 22.04** and the compiler
+    **GCC 9.4**.
 
 .. Important::
     With the following installation methods, you will download and install *Mininet*
-    and the P4-Tools suite (P4-Utils, P4-Learning and their dependencies) in your 
+    and the P4-Tools suite (P4-Utils, P4-Learning and their dependencies) in your
     user's home directory.
 
 One-Step Automated Install
 __________________________
 
-To get started quickly and conveniently, you may want to install the P4-Tools suite 
+To get started quickly and conveniently, you may want to install the P4-Tools suite
 using the following command::
 
     curl -sSL https://raw.githubusercontent.com/nsg-ethz/p4-utils/master/install-tools/install-p4-dev.sh | bash