Run a REXX script through SSH

lpar_rexx.sh

#!/bin/bash

# Store password securely (file with 600 permissions)
# echo "yourpassword" > ~/.ssh/z_pass
# chmod 600 ~/.ssh/z_pass

PASSWORD=$(cat ~/.ssh/z_pass)

# List of LPARs
LPARS=("lpar1" "lpar2" "lpar3")

# REXX script content
REXX_SCRIPT='/* your rexx code here */
SAY "Script running"
'

for lpar in "${LPARS[@]}"; do
  echo "Processing $lpar..."
  
  # Upload REXX script
  echo "$REXX_SCRIPT" | sshpass -p "$PASSWORD" ssh user@$lpar "cat > /tmp/netspi_apf.rexx"
  
  # Make executable, run, get output, delete
  sshpass -p "$PASSWORD" ssh user@$lpar "chmod +x /tmp/netspi_apf.rexx && /tmp/netspi_apf.rexx > /tmp/output.txt 2>&1 && cat /tmp/output.txt && rm /tmp/netspi_apf.rexx /tmp/output.txt"  > "${lpar}_output.txt"
  
done