Merge branch 'rotscher--tu-dresden.de-preview-patch-54625' into 'preview'

Rotscher  tu dresden.de preview patch 54625

Closes #303

See merge request !533

doc.zih.tu-dresden.de/docs/software/containers.md

@@ -46,7 +46,7 @@ instructions from the official documentation to install Singularity.
 1. Check if `go` is installed by executing `go version`.  If it is **not**:
 
     ```console
-    marie@local$ wget <https://storage.googleapis.com/golang/getgo/installer_linux> && chmod +x
+    marie@local$ wget 'https://storage.googleapis.com/golang/getgo/installer_linux' && chmod +x
     installer_linux && ./installer_linux && source $HOME/.bash_profile
     ```
 
@@ -88,7 +88,9 @@ instructions from the official documentation to install Singularity.
 There are two possibilities:
 
 1. Create a new container on your local workstation (where you have the necessary privileges), and
-   then copy the container file to ZIH systems for execution.
+   then copy the container file to ZIH systems for execution. Therefore you also have to install
+   [Singularity](https://sylabs.io/guides/3.0/user-guide/quick_start.html#quick-installation-steps)
+   on your local workstation.
 1. You can, however, import an existing container from, e.g., Docker.
 
 Both methods are outlined in the following.
@@ -103,10 +105,11 @@ You can create a new custom container on your workstation, if you have root righ
     which is different to the x86 architecture in common computers/laptops. For that you can use
     the [VM Tools](singularity_power9.md).
 
-Creating a container is done by writing a **definition file** and passing it to
+Creating a container is done by writing a definition file, such as `myDefinition.def`, and passing
+it to `singularity` via
 
 ```console
-marie@local$ singularity build myContainer.sif <myDefinition.def>
+marie@local$ singularity build myContainer.sif myDefinition.def
 ```
 
 A definition file contains a bootstrap
@@ -167,7 +170,7 @@ https://github.com/singularityware/singularity/tree/master/examples.
 You can import an image directly from the Docker repository (Docker Hub):
 
 ```console
-marie@local$ singularity build my-container.sif docker://ubuntu:latest
+marie@login$ singularity build my-container.sif docker://ubuntu:latest
 ```
 
 Creating a singularity container directly from a local docker image is possible but not
@@ -284,7 +287,7 @@ While the `shell` command can be useful for tests and setup, you can also launch
 inside the container directly using "exec":
 
 ```console
-marie@login$ singularity exec my-container.img /opt/myapplication/bin/run_myapp
+marie@login$ singularity exec my-container.sif /opt/myapplication/bin/run_myapp
 ```
 
 This can be useful if you wish to create a wrapper script that transparently calls a containerized
@@ -299,7 +302,7 @@ if [ "z$X" = "z" ] ; then
   exit 1
 fi
 
-singularity exec /scratch/p_myproject/my-container.sif /opt/myapplication/run_myapp "$@"
+singularity exec /projects/p_number_crunch/my-container.sif /opt/myapplication/run_myapp "$@"
 ```
 
 The better approach is to use `singularity run`, which executes whatever was set in the `%runscript`