Polkadot node update script

update_node

#! /bin/bash

wget https://github.com/paritytech/polkadot/releases/download/v$1/polkadot && \
wget https://github.com/paritytech/polkadot/releases/download/v$1/polkadot.sha256 && \
sed -i 's+./artifacts/polkadot+polkadot+g' polkadot.sha256

if sha256sum -c polkadot.sha256 2>&1 | grep -q 'OK'
then 
        echo "** SHA256 matches **"
        chmod +x polkadot && \
        sudo chown polkadot:polkadot polkadot && \
        sudo systemctl stop polkadot.service && \
        sudo mv polkadot /usr/local/bin/polkadot && \
        rm polkadot.sha256 && \
        sudo systemctl start polkadot.service && \
        sudo journalctl -f -u polkadot.service
else
        echo "** SHA256 doesn't match. Aborting **"
        rm polkadot*
fi

echo done!

Usage: ./update_node <version> (without the v in version). Example: ./update_node 0.9.8
polkadot: User running the service (change accordingly in chown polkadot:polkadot)
polkadot.service: Service name (change accordingly in all instances)
The last line journalctl will run the service logs to check the update has been successful. Exit with Ctrl+C