update jdk8 with apt in ubuntu18

chenglin you — Sun, 23 Jun 2024 14:28:29 +0000

Following steps are running on a ubuntu18 server vm in pve.
And jdk8 was installed with apt previously a few years ago.

check current version in use
run: java -version
got: openjdk version "1.8.0_312"
This version is outdated.
check apt source
run:
sudo apt update
then:
run: apt list | grep jdk
this will give something like
openjdk-8-jdk/bionic-updates,bionic-security,now 8u372-ga~us1-0ubuntu1~18.04 amd64
followed by [upgradable from: ...]
This is quite obvious.
upgrade
run: sudo apt upgrade openjdk-8-jdk
This may complain like:
Could not get lock /var/lib/dpkg/lock-frontend - open
This means some apt process is holding the lock.
run: sudo ps -ef | grep apt to check related processes.
If the processes in result are some background task of apt or apt-get like daily-apt, just wait for the background work to finish.
If not, may have to kill the processes or contact server administrator.
then:
run: sudo apt upgrade openjdk-8-jdk
check again
run: java -version
got: openjdk version "1.8.0_362"

Done.

DEV Community: chenglin you