spawn ssh -o StrictHostKeyChecking=no opsuser@8.147.119.215 su - root -c 'echo msg_count; grep -c " MSG " /tmp/csfzx_mqtt_60_sim_messages.log || true; echo first_msgs; grep " MSG " /tmp/csfzx_mqtt_60_sim_messages.log | head -5 || true; echo last_msgs; grep " MSG " /tmp/csfzx_mqtt_60_sim_messages.log | tail -5 || true'

opsuser@8.147.119.215's password:
Password: T8bN!3vGx$6jHy%1c
msg_count
0
first_msgs
last_msgs