# Update & Upgrade

Updates and upgrades are one of the maintenance tasks for sytem. Programs that are not upgraded for a long time, like buildings that are not maintained for a long time, will accelerate aging and gradually lose functionality until they are unavailable.

You should know the differences between the terms Update and Upgrade(Extended reading (opens new window))

  • Operating system patching is Update, Ubuntu16.04 to Ubuntu18.04 is Upgrade
  • MySQL5.6.25 to MySQL5.6.30 is Update, MySQL5.6 to MySQL5.7 is Upgrade

For ActiveMQ maintenance, focus on the following two Update & Upgrade jobs

  • Sytem update(Operating System and Running Environment)
  • ActiveMQ upgrade

# System Update

Run an update command to complete the system update:

#For Ubuntu&Debian
apt update && apt upgrade -y

#For Centos&Redhat
yum update -y

This deployment package is preconfigured with a scheduled task for automatic updates. If you want to remove the automatic update, please delete the corresponding Cron

# ActiveMQ Upgrade

ActiveMQ upgrade is similar to installation, you can upgrade it by the following steps

  1. Prepare for upgrade
    # stop ActiveMQ service
    systemctl stop activemq
    # rename the dir of ActiveMQ for backup
    mv /opt/apache-activemq  /opt/apache-activemqBK
  2. Download ActiveMQ (opens new window) and upload it to the directory /opt after unzip it, then renamed the directory to apache-activemq
  3. Run the following modify permissions separately
    chown -R activemq. /opt/apache-activemq
    chmod 640  /opt/apache-activemq/examples/stomp/php/*
    chmod +x /opt/apache-activemq/bin/activemq
  4. Restart the ActiveMQ Service