From 2072f93f4e3304ff2eb810ac6b8bb9f1484457c1 Mon Sep 17 00:00:00 2001
From: Fabio Durastante <fabio.durastante@unipi.it>
Date: Wed, 3 May 2023 06:53:20 +0000
Subject: [PATCH] Aggiunto script di creazione utenti

---
 Setup-iniziale.md | 92 ++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 91 insertions(+), 1 deletion(-)

diff --git a/Setup-iniziale.md b/Setup-iniziale.md
index 0328b9e..7951ee9 100644
--- a/Setup-iniziale.md
+++ b/Setup-iniziale.md
@@ -145,4 +145,94 @@ Al termine della configurazione avviare il servizio:
 ```bash
 sudo systemctl start slurmctld
 sudo systemctl start slurmd
-```
\ No newline at end of file
+```
+
+### Creazione utenti
+
+Affinché un programma possa essere lanciato su tutti i nodi è necessario che l'**utente** sia disponibile su ciascuno di essi, il seguente script si occupa di replicare l'utente ovunque sia necessario:
+```bash
+#!/bin/bash
+#
+# Add a SLURM user to the Steffè cluster
+# A good place for this script is in:
+# /usr/local/bin/cluster-users
+
+set -e
+
+cluster_hosts="steffe0 steffe1 steffe2 steffe3 steffe4 steffe5 steffe6 steffe7 steffe8 steffe9 steffe10 steffe11 steffe12 steffe13 steffe14 steffe15 steffe16 steffe17 steffe18 steffe19"
+
+function help {
+  echo "Usage: $0 COMMAND username"
+  echo ""
+  echo "Examples: "
+  echo "  -) $0 --add utente"
+  echo "  -) $0 --delete utente"
+}
+
+function add_user {
+    if [ "$1" == "" ]; then
+      echo "Specify a valid username for the new user"
+      exit 1
+    fi
+
+    if [ "$2" != "" ]; then
+      echo "Unsupported option specified"
+      exit 1
+    fi
+
+    adduser $1
+
+    # We obtain the UID of the new user, as the last line at the end
+    # of passwd
+    userid=$(grep $1 /etc/passwd | tail -n1 | cut -d ':' -f3)
+
+    for h in ${cluster_hosts}; do
+      echo -n "Creating the user $1 on $h ... "
+      ssh ${h} useradd -u ${userid} $1
+      echo "done"
+    done
+}
+
+function del_user {
+    if [ "$1" == "" ]; then
+      echo "Specify a valid username to delete"
+      exit 1
+    fi
+
+    if [ "$2" != "" ]; then
+      echo "Unsupported option specified"
+      exit 1
+    fi
+
+    echo -n "This command will remove the user $1, proceed? [yn]: "
+    read ans
+
+    if [ "$ans" != "y" ]; then
+      echo "Exiting"
+      exit 0
+    fi
+
+    userdel -f $1
+
+    for h in ${cluster_hosts}; do
+      echo -n "Creating the user $1 on $h ... "
+      ssh ${h} userdel -f $1
+      echo "done"
+    done
+
+    echo "Note: the home directory /home/$1 has been preserved,"
+    echo "      you may wish to delete that as well."
+}
+
+if [ "$1" == "--add" ]; then
+  add_user $2
+  exit 0
+fi
+
+if [ "$1" == "--delete" ]; then
+  del_user $2
+  exit 0
+fi
+
+help
+```