Ubuntu 18.04 EOL

Remove references to Ubuntu 18.04.

Make edits to MPI def file examples, bumping to newer versions that
compile without issue on Ubuntu 22.04 (gfortran 10).

Author: dtrudg

cloud_library.rst

@@ -286,7 +286,7 @@ Here's a typical remote build command:
 
 .. code::
 
-   $ singularity build --remote file-out.sif docker://ubuntu:18.04
+   $ singularity build --remote file-out.sif docker://ubuntu:22.04
 
 Building from a definition file:
 ================================
@@ -296,7 +296,7 @@ This is our definition file. Let's call it ``ubuntu.def``:
 .. code:: singularity
 
    bootstrap: library
-   from: ubuntu:18.04
+   from: ubuntu:22.04
 
    %runscript
        echo "hello world from ubuntu container!"

encryption.rst

@@ -22,10 +22,9 @@ at runtime completely within kernel space.
 
 .. note::
 
-   This feature utilizes the Linux ``dm-crypt`` library and
-   ``cryptsetup`` utility and requires cryptsetup version of >= 2.0.0.
-   This version should be standard with recent Linux versions such as
-   Ubuntu 18.04, Debian 10 and CentOS/RHEL 7, but users of older Linux
+   This feature utilizes the Linux ``dm-crypt`` library and ``cryptsetup``
+   utility and requires cryptsetup version of >= 2.0.0. This version should be
+   standard with recent Linux versions such as, but users of older Linux
    versions may have to update.
 
 **********************

gpu.rst

@@ -433,10 +433,6 @@ you must ensure that:
 These requirements can be satisfied by following the requirements on the
 `ROCm web site <https://rocm.github.io/ROCmInstall.html>`__
 
-At time of release, {Singularity} was tested successfully on Debian 10
-with ROCm 2.8/2.9 and the upstream kernel driver, and Ubuntu 18.04 with
-ROCm 2.9 and the DKMS driver.
-
 Example - tensorflow-rocm
 =========================
 

mpi.rst

@@ -144,14 +144,14 @@ example can be used:
 .. code::
 
    Bootstrap: docker
-   From: ubuntu:18.04
+   From: ubuntu:22.04
 
    %files
        mpitest.c /opt
 
    %environment
        # Point to MPICH binaries, libraries man pages
-       export MPICH_DIR=/opt/mpich-3.3.2
+       export MPICH_DIR=/opt/mpich-4.1.1
        export PATH="$MPICH_DIR/bin:$PATH"
        export LD_LIBRARY_PATH="$MPICH_DIR/lib:$LD_LIBRARY_PATH"
        export MANPATH=$MPICH_DIR/share/man:$MANPATH
@@ -162,7 +162,7 @@ example can be used:
        apt-get update && apt-get install -y wget git bash gcc gfortran g++ make
 
        # Information about the version of MPICH to use
-       export MPICH_VERSION=3.3.2
+       export MPICH_VERSION=4.1.1
        export MPICH_URL="http://www.mpich.org/static/downloads/$MPICH_VERSION/mpich-$MPICH_VERSION.tar.gz"
        export MPICH_DIR=/opt/mpich
 
@@ -200,7 +200,7 @@ If the host MPI is Open MPI, the definition file looks like:
 .. code::
 
    Bootstrap: docker
-   From: ubuntu:18.04
+   From: ubuntu:22.04
 
    %files
        mpitest.c /opt
@@ -214,11 +214,11 @@ If the host MPI is Open MPI, the definition file looks like:
 
    %post
        echo "Installing required packages..."
-       apt-get update && apt-get install -y wget git bash gcc gfortran g++ make file
+       apt-get update && apt-get install -y wget git bash gcc gfortran g++ make file bzip2
 
        echo "Installing Open MPI"
        export OMPI_DIR=/opt/ompi
-       export OMPI_VERSION=4.0.5
+       export OMPI_VERSION=4.1.5
        export OMPI_URL="https://download.open-mpi.org/release/open-mpi/v4.0/openmpi-$OMPI_VERSION.tar.bz2"
        mkdir -p /tmp/ompi
        mkdir -p /opt
@@ -342,7 +342,7 @@ program, which in this case has been compiled on the host to
 .. code::
 
    Bootstrap: docker
-   From: ubuntu:18.04
+   From: ubuntu:22.04
 
    %files
          /tmp/mpitest /opt/mpitest

networking.rst

@@ -51,7 +51,7 @@ hostname within the container.
 .. code::
 
    $ hostname
-   ubuntu-bionic
+   ubuntu
 
    $ sudo singularity exec --hostname hal-9000 my_container.sif hostname
    hal-9000