Silence HPE server fans using hacked iLO firmware

silence-fans.sh

#!/bin/bash
# iLO4 hacking: https://github.com/kendallgoto/ilo4_unlock

sshPrivateKey="/root/.ssh/id_rsa"
iloPort=22
iloUser="Administrator"
iloAddress="10.2.2.2"
jumpHost="-J [email protected]"  # set this to a jump host if your iLO is using a shared network port

fanMaxSpeed_global="40"
fanMaxSpeed_0=${fanMaxSpeed_global}
fanMaxSpeed_1=${fanMaxSpeed_global}
fanMaxSpeed_2=${fanMaxSpeed_global}
fanMaxSpeed_3=${fanMaxSpeed_global}
sshCommand="/usr/bin/ssh -i ${sshPrivateKey} -oKexAlgorithms=+diffie-hellman-group1-sha1 -p ${iloPort} ${jumpHost} ${iloUser}@${iloAddress}"

# check SSH connection by running `time` to get an output like `time\r\r\n01:23:45\r\n\r\r\n`
timeOutput=$(${sshCommand} "time")
timeOutputRegex=$'^time\r\r\n[0-9]{2}:[0-9]{2}:[0-9]{2}\r\n\r\r'
if [[ ! "${timeOutput}" =~ ${timeOutputRegex} ]]; then
  echo "SSH connection to iLO failed"
  exit 1
fi

# adjust the fan speed maximums
#${sshCommand} "fan p 0 max ${fanMaxSpeed_0}"
#${sshCommand} "fan p 1 max ${fanMaxSpeed_1}"
#${sshCommand} "fan p 2 max ${fanMaxSpeed_2}"
${sshCommand} "fan p 3 max ${fanMaxSpeed_3}"