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apt-get install openjdk-11-jdk -y
apt-get install openjdk-17-jdk -y
update-alternatives --config java

apt-get install openjdk-11-jdk -y apt-get install openjdk-17-jdk -y update-alternatives --config java

sudo apt update
sudo apt install -y wget gnupg curl
wget -O - https://repos.azul.com/azul-repo.key | sudo gpg --dearmor -o /usr/share/keyrings/azul.gpg
echo "deb [signed-by=/usr/share/keyrings/azul.gpg] https://repos.azul.com/zulu/deb stable main" | sudo tee /etc/apt/sources.list.d/zulu.list
sudo apt update
sudo apt install zulu21-jdk
sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/zulu21/bin/javac 21
sudo update-alternatives --config java
echo "export JAVA_HOME=/usr/lib/jvm/zulu21" >> ~/.bashrc
echo "export PATH=$PATH:$JAVA_HOME/bin" >> ~/.bashrc
source ~/.bashrc

sudo apt update sudo apt install -y wget gnupg curl wget -O - https://repos.azul.com/azul-repo.key | sudo gpg --dearmor -o /usr/share/keyrings/azul.gpg echo "deb [signed-by=/usr/share/keyrings/azul.gpg] https://repos.azul.com/zulu/deb stable main" | sudo tee /etc/apt/sources.list.d/zulu.list sudo apt update sudo apt install zulu21-jdk sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/zulu21/bin/javac 21 sudo update-alternatives --config java echo "export JAVA_HOME=/usr/lib/jvm/zulu21" >> ~/.bashrc echo "export PATH=$PATH:$JAVA_HOME/bin" >> ~/.bashrc source ~/.bashrc

sudo apt update
sudo apt list --upgradable
sudo apt-get upgrade --dry-run
sudo -i reboot now
sudo journalctl -f -u abcd.service

sudo apt update sudo apt list --upgradable sudo apt-get upgrade --dry-run sudo -i reboot now sudo journalctl -f -u abcd.service