Signum Node update script

Bash script for automatic checking for and installation of updates of signum-network/signum-node on GNU Linux based systems.

Tested on Debian 11 "bullseye" release.

Requirements

• symbolic link /root/signum-node -> /path/to/signum-node-vN.N.N where N.N.N refers to any current or old version, e.g. 3.5.2
• signum-node is running as a service named signum-node.service
• custom node properties file /conf/node.properties exists
• script is croned as root user

Fulfill requirements

Rename current signum-node folder wherever it is if needed to a required format.

Example:

mv -f /path/to/signum-node-folder /path/to/signum-node-v3.5.2

Create a symbolic link:

sudo ln -s /path/to/signum-node-v3.5.2 /root/signum-node

Create or copy a custom service:

sudo nano /etc/systemd/system/signum-node.service

Example here:

[Unit]

    Description=Signum Node
    After=network.target
    Wants=network.target

[Service]

    ExecStart=/usr/bin/java -jar signum-node.jar -l
    WorkingDirectory=/root/signum-node/
    User=root
    Restart=always
    RestartSec=10

[Install]

    WantedBy=multi-user.target

Reload systemd manager configuration:

sudo systemctl daemon-reload

then enable and run the service:

sudo systemctl enable signum-node.service
sudo systemctl start signum-node.service

Status should be active (running):

sudo systemctl status signum-node.service

Custom node.properties

It's better to leave /conf/node-default.properties untouched (default) to let updates come to life and make your changes in a custom properties file. Example: ''' cp /path/to/signum-node-v3.5.2/conf/node-default.properties /path/to/signum-node-v3.5.2/conf/node.properties nano /path/to/signum-node-v3.5.2/conf/node.properties '''

Schedule script running

sudo crontab -e

Examples:

0 5 * * 0 /root/signum-node-update.sh # check for updates every Sunday at 5:00 AM
0 * * * * /root/signum-node-update.sh # check for updates every hour at 00 minutes
0 */3 * * * /root/signum-node-update.sh # check for updates every 3 hours at 00 minutes