Hypertechblog

Type the apt command or apt-get command to upgrade existing system:   sudo apt update   sudo apt upgrade Reboot the Linux box if kernel was updated   sudo reboot If you have a ufw firewall running on ufw, open ssh port 1022 using the following ufw syntax:   sudo ufw allow 1022/tcp comment 'Temp open port ssh tcp port 1022 for upgrade' Upgrade the operating system to the latest release from the command-line by typing the following command:   sudo do-release-upgrade After some time you will see “System upgrade is complete” message. Press y to restart your system to load updates kernel and operating system for your cloud server: Verification Login using the ssh command:   ssh user@your-ubuntu-server Verify Ubuntu Linux kernel version with uname:   uname -r Make sure all needed ports are open and running with the ss command or netstat command:   sudo ss -tulpn   sudo netstat -tulpn Use grep command/egrep command or tail command/cat command to verify log files for errors:    dmesg  

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