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Tiny improvements in setup #99

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Jan 15, 2023
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Tiny improvements in setup #99

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6 changes: 3 additions & 3 deletions setup.md
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Expand Up @@ -2,7 +2,7 @@
title: Setup
---

In this document we use Apptainer and Singularity interchangeably. See the [Introduction]({{ page.root }}{% link _episodes/01-introduction.md %})
In this document we use the names *Apptainer* and *Singularity* interchangeably. See the [Introduction]({{ page.root }}{% link _episodes/01-introduction.md %})
for more details about existing Apptainer and Singularity versions and the differences between them.

## Option 1: Use pre-installed singularity on a cluster
Expand All @@ -13,9 +13,9 @@ Check if singularity is available with
singularity --version
```
If installed, you will see `apptainer version ...` or `singularity version ...`, depending on the flavor installed.
If it is not in your PATH you may still be able to use it via CVMFS: check if you have user namespaces enabled and CVMFS to run singularity that way:
If it is not in your [`$PATH`](https://www.makeuseof.com/set-path-variable-in-linux/#what-is-path-in-linux) you may still be able to use it via [CVMFS](https://cernvm.cern.ch/fs/): check if you have user namespaces enabled and CVMFS to run singularity that way:
```bash
[[ $(cat /proc/sys/user/max_user_namespaces) -gt 0 ]] && ls /cvmfs/oasis.opensciencegrid.org/mis/ &>/dev/null && { export PATH=/cvmfs/oasis.opensciencegrid.org/mis/apptainer/bin/:"$PATH"; echo "Added to PATH"; singularity --version; } || echo "Unable to run Singularity/Apptainer via CVMFS"
[[ $(cat /proc/sys/user/max_user_namespaces) -gt 0 ]] && ls /cvmfs/oasis.opensciencegrid.org/mis/ &>/dev/null && { export PATH=/cvmfs/oasis.opensciencegrid.org/mis/apptainer/bin/:"$PATH"; echo "Success: Added to PATH"; singularity --version; } || echo "Failure: Unable to run Singularity/Apptainer via CVMFS"
```
If this works, it will be added to your path and you will see your singularity/apptainer version.

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