apt-get install default-jdk我每次都无法获取openjdk-6-jdk
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
ca-certificates-java fontconfig fontconfig-config hicolor-icon-theme
icedtea-6-jre-cacao icedtea-6-jre-jamvm icedtea-netx icedtea-netx-common
java-common libasound2 libasyncns0 libatk-wrapper-java
libatk-wrapper-java-jni libatk1.0-0 libatk1.0-data libcairo2 libdatrie1
libflac8 libfontconfig1 libgdk-pixbuf2.0-0 libgdk-pixbuf2.0-common libgif4
libgtk2.0-0 libgtk2.0-bin libgtk2.0-common libice-dev libice6 libjasper1
libjpeg-turbo8 libjpeg8 libjson0 libogg0 libpango1.0-0 libpixman-1-0
libpthread-stubs0 libpthread-stubs0-dev libpulse0 libsm-dev libsm6
libsndfile1 libthai-data libthai0 libtiff4 libvorbis0a libvorbisenc2
libx11-dev libx11-doc libxau-dev libxcb-render0 libxcb-shm0 libxcb1-dev
libxcomposite1 libxcursor1 libxdamage1 libxdmcp-dev libxfixes3 libxft2
libxi6 libxinerama1 libxrandr2 libxrender1 libxt-dev libxt6 libxtst6
openjdk-6-jre openjdk-6-jre-headless openjdk-6-jre-lib shared-mime-info
ttf-dejavu-core ttf-dejavu-extra tzdata-java x11-common x11proto-core-dev
x11proto-input-dev x11proto-kb-dev xorg-sgml-doctools xtrans-dev
Suggested packages:
default-jre equivs libasound2-plugins libasound2-python librsvg2-common gvfs
libjasper-runtime ttf-baekmuk ttf-arphic-gbsn00lp ttf-arphic-bsmi00lp
ttf-arphic-gkai00mp ttf-arphic-bkai00mp pulseaudio libxcb-doc openjdk-6-demo
openjdk-6-source visualvm icedtea-plugin libnss-mdns sun-java6-fonts
fonts-ipafont-gothic fonts-ipafont-mincho ttf-wqy-microhei ttf-wqy-zenhei
ttf-indic-fonts-core ttf-telugu-fonts ttf-oriya-fonts ttf-kannada-fonts
ttf-bengali-fonts
The following NEW packages will be installed:
ca-certificates-java fontconfig fontconfig-config hicolor-icon-theme
icedtea-6-jre-cacao icedtea-6-jre-jamvm icedtea-netx icedtea-netx-common
java-common libasound2 libasyncns0 libatk-wrapper-java
libatk-wrapper-java-jni libatk1.0-0 libatk1.0-data libcairo2 libdatrie1
libflac8 libfontconfig1 libgdk-pixbuf2.0-0 libgdk-pixbuf2.0-common libgif4
libgtk2.0-0 libgtk2.0-bin libgtk2.0-common libice-dev libice6 libjasper1
libjpeg-turbo8 libjpeg8 libjson0 libogg0 libpango1.0-0 libpixman-1-0
libpthread-stubs0 libpthread-stubs0-dev libpulse0 libsm-dev libsm6
libsndfile1 libthai-data libthai0 libtiff4 libvorbis0a libvorbisenc2
libx11-dev libx11-doc libxau-dev libxcb-render0 libxcb-shm0 libxcb1-dev
libxcomposite1 libxcursor1 libxdamage1 libxdmcp-dev libxfixes3 libxft2
libxi6 libxinerama1 libxrandr2 libxrender1 libxt-dev libxt6 libxtst6
openjdk-6-jdk openjdk-6-jre openjdk-6-jre-headless openjdk-6-jre-lib
shared-mime-info ttf-dejavu-core ttf-dejavu-extra tzdata-java x11-common
x11proto-core-dev x11proto-input-dev x11proto-kb-dev xorg-sgml-doctools
xtrans-dev
0 upgraded, 78 newly installed, 0 to remove and 3 not upgraded.
Need to get 25.3 MB/61.7 MB of archives.
After this operation, 180 MB of additional disk space will be used.
Do you want to continue [Y/n]? Y
Get:1 http://archive.ubuntu.com/ubuntu/ precise-updates/main openjdk-6-jre-headless amd64 6b24-1.11.5-0ubuntu1~12.04.1 [25.3 MB]
Fetched 25.3 MB in 4s (5325 kB/s)
Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/o/openjdk-6/openjdk-6-jre-headless_6b24-1.11.5-0ubuntu1~12.04.1_amd64.deb Hash Sum mismatch
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
答案1
步骤 1：安装 Java 8（JDK 8）
在我们的系统中添加 webupd8team Java PPA 存储库并使用以下命令集安装 Oracle java8。
$ sudo add-apt-repository ppa:webupd8team/java
$ sudo apt-get update
$ sudo apt-get install oracle-java8-installer
第 2 步：验证 JAVA 版本
使用上述步骤成功安装 Oracle Java 后，使用以下命令验证安装的版本。
$ java -version
java version "1.8.0_25"
Java(TM) SE Runtime Environment (build 1.8.0_25-b17)
Java HotSpot(TM) 64-Bit Server VM (build 25.25-b02, mixed mode)
步骤3：设置JAVA环境
Webupd8team 提供了一个用于设置环境变量的包，使用以下命令安装此包。
$ sudo apt-get install oracle-java8-set-default
答案2
似乎下载的软件包在某种程度上已损坏，并且哈希校验和检查检测到了这一点（如错误消息所示，校验失败）。它可能在您的本地计算机上或您正在使用的 Ubuntu 镜像上损坏。1
尝试运行
sudo apt-get clean all
sudo apt-get update
然后重新尝试安装。
如果这不能解决问题，请尝试更换镜像：我怎样才能使用靠近我的镜像，或者选择更快的镜像？
1 您的情况不太可能发生，因为您使用的是主存档。但对于遇到此问题的其他类似用户来说，提及这一点很有用。