A script to update lighthouse to a given version

updateLighthouse.sh

#!/bin/bash
# Assumption 1: you have lighthouse running on ubuntu with systemctl
# Assumption 2: lighthouse binary is in /home/lighthouse/.cargo/bin/lighthouse
# If otherwise, change the script accordingly

latestVersion="2.5.0" ##Change this before running, see https://github.com/sigp/lighthouse/releases 


logFile="/home/lighthouse/lighthouseUpdate.log"
filename="lighthouse-v"$latestVersion"-aarch64-unknown-linux-gnu.tar.gz"
url="https://github.com/sigp/lighthouse/releases/download/v"$latestVersion"/lighthouse-v"$latestVersion"-aarch64-unknown-linux-gnu.tar.gz"

#remove the old logfile
rm $logFile
currentVersion=$(/home/lighthouse/.cargo/bin/lighthouse --version)
currentVersion=${currentVersion:0:25}
echo 'lighthouse current version' $currentVersion

echo 'Now updating lighthouse to v'$latestVersion', process started'

cd lighthouse-bin/
echo 'Downloading v'$latestVersion' from ' $url

wget $url > $logFile 2>&1
echo 'Unpacking '$filename
tar -xvf $filename >> $logFile 2>&1

echo 'Stoppping validator and beacon node  (can take some time)'
sudo systemctl stop lighthousevalidator >> $logFile 2>&1
sudo systemctl stop lighthousebeacon >> $logFile 2>&1

echo 'Backing up the old bin to /home/lighthouse/.cargo/bin/_lighthouse'
mv /home/lighthouse/.cargo/bin/lighthouse /home/lighthouse/.cargo/bin/_lighthouse

echo 'Replacing the new binary'
mv lighthouse /home/lighthouse/.cargo/bin/lighthouse

installedVersion=$(/home/lighthouse/.cargo/bin/lighthouse --version)
installedVersion=${installedVersion:0:25}
echo 'Checking installed version: ' $installedVersion

echo 'Starting beacon and validator node (can take some time)'
sudo systemctl start lighthousebeacon >> $logFile 2>&1
sudo systemctl start lighthousevalidator >> $logFile 2>&1

echo 'Removing the tar compressed file '$filename
rm $filename

echo "Process completed! Check the logs in "$logFile
echo 'if it failed, you could restore the old version('$currentVersion') with mv /home/lighthouse/.cargo/bin/_lighthouse /home/lighthouse/.cargo/bin/lighthouse'