Aggiunte info su script di configurazione iniziale

Setup-iniziale.md

@@ -1,3 +1,5 @@
+
+## Script di configurazione iniziale del nodo
 Script utilizzato per installare le macchine:
 
 ```bash
@@ -25,3 +27,48 @@ apt update -y && apt upgrade -y
 # Install required packages
 apt -y install build-essential gcc openmpi-bin openmpi-common libopenmpi-dev glusterfs-server slurm python3-pip valgrind tree git curl man-db mc parallel neovim unrar atool
 ```
+
+## Personalizzare la shell di login sul Nodo 0
+
+Possiamo personalizzare il messaggio che appare al login sul nodo zero creando il seguente script `on_login.sh`:
+
+```
+#! /usr/bin/env bash
+
+# Basic info
+HOSTNAME=`uname -n`
+ROOT=`df -Ph | grep xvda1 | awk '{print $4}' | tr -d '\n'`
+
+# System load
+MEMORY1=`free -t -m | grep Total | awk '{print $3" MB";}'`
+MEMORY2=`free -t -m | grep "Mem" | awk '{print $2" MB";}'`
+LOAD1=`cat /proc/loadavg | awk {'print $1'}`
+LOAD5=`cat /proc/loadavg | awk {'print $2'}`
+LOAD15=`cat /proc/loadavg | awk {'print $3'}`
+
+echo "
+===================================================
+ _______________________ _______ _______ _______ _ 
+(  ____ \__   __(  ____ (  ____ (  ____ (  ____ ( )
+| (    \/  ) (  | (    \/ (    \/ (    \/ (    \// 
+| (_____   | |  | (__   | (__   | (__   | (__      
+(_____  )  | |  |  __)  |  __)  |  __)  |  __)     
+      ) |  | |  | (     | (     | (     | (        
+/\____) |  | |  | (____/\ )     | )     | (____/\  
+\_______)  )_(  (_______//      |/      (_______/  
+                                                   
+===================================================
+ - Hostname............: $HOSTNAME
+ - Disk Space..........: $ROOT remaining
+===================================================
+ - CPU usage...........: $LOAD1, $LOAD5, $LOAD15 (1, 5, 15 min)
+ - Memory used.........: $MEMORY1 / $MEMORY2
+ - Swap in use.........: `free -m | tail -n 1 | awk '{print $3}'` MB
+===================================================
+"
+```
+e poi copiandolo nella directory opportuna:
+```
+sudo mv on_login.sh /etc/update-motd.d/05-info
+sudo chmod +x /etc/update-motd.d/05-info
+```