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initial formatting changes complete

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viessm_h
2026-01-06 16:40:15 +01:00
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docs/merlin7/02-How-To-Use-Merlin/kerberos.md
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@@ -1,12 +1,4 @@
---
title: Kerberos and AFS authentication
#tags:
keywords: kerberos, AFS, kinit, klist, keytab, tickets, connecting, client, configuration, slurm
last_updated: 07 September 2022
summary: "This document describes how to use Kerberos."
sidebar: merlin7_sidebar
permalink: /merlin7/kerberos.html
---
# Kerberos and AFS authentication
Projects and users have their own areas in the central PSI AFS service. In order
to access to these areas, valid Kerberos and AFS tickets must be granted.
@@ -58,7 +50,7 @@ Kerberos ticket is mandatory.
krenew
```
* Keep in mind that the maximum lifetime for granting tickets is 7 days, therefore `krenew` can not be used beyond that limit,
* Keep in mind that the maximum lifetime for granting tickets is 7 days, therefore `krenew` can not be used beyond that limit,
and then `kinit` should be used instead.
## Obtanining granting tickets with keytab
@@ -95,8 +87,8 @@ For generating a **keytab**, one has to:
```
Please note:
* That you will need to add your password once. This step is required for generating the **keytab** file.
* `ktutil`does **not** report an error if you enter a wrong password! You can test with the `kinit` command documented below. If `kinit` fails with an error message like "pre-authentication failed", this is usually due to a wrong password/key in the keytab file. In this case **you have to remove the keytab file** and re-run the `ktutil` command. See "Updating the keytab file" in the section below.
* That you will need to add your password once. This step is required for generating the **keytab** file.
* `ktutil`does **not** report an error if you enter a wrong password! You can test with the `kinit` command documented below. If `kinit` fails with an error message like "pre-authentication failed", this is usually due to a wrong password/key in the keytab file. In this case **you have to remove the keytab file** and re-run the `ktutil` command. See "Updating the keytab file" in the section below.
### Updating an existing keytab file
@@ -177,7 +169,7 @@ This is the **recommended** way. At the end of the job, is strongly recommended
#SBATCH --output=run.out # Generate custom output file
#SBATCH --error=run.err # Generate custom error file
#SBATCH --nodes=1 # Uncomment and specify #nodes to use
#SBATCH --ntasks=1 # Uncomment and specify #nodes to use
#SBATCH --ntasks=1 # Uncomment and specify #nodes to use
#SBATCH --cpus-per-task=1
#SBATCH --constraint=xeon-gold-6152
#SBATCH --hint=nomultithread