sensei@sensei-System-Product-Name:~$ sudo apt-get install oracle-java8-installer Package oracle-java8-installer is not available, but is referred to by another package.这可能意味着软件包丢失、已过时或只能从其他来源获得
E: Package 'oracle-java8-installer
我正在尝试在Ubuntu14.04中安装cassandra,当我运行这个命令时就会遇到这个问题:sudo apt-get install cassandra。may mean that the package is missing, has been obsoleted, or is only available from another source
E:我需要在我的机器上安装cassandra