This guide assumes that the current systemd file is named as celestia-bridge
Downloading and installing Binary
sudo systemctl stop celestia-bridge
cd $HOME
git clone https://github.com/celestiaorg/celestia-node.git
cd celestia-node
git pull
git checkout v0.21.3-mocha
make build
make install
#checking if the version is correct
/usr/local/bin/./celestia version
# should show
# Semantic version: v0.21.3-mocha
# Start Node and check logs
sudo systemctl start celestia-bridge && sudo journalctl -u celestia-bridge -f -o cat