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无法更改更新替代方案 mvn

tag-icon • tag-icon 14.04 command-line update-alternatives
无法更改更新替代方案 mvn

Ubuntu 14.04

安装后通过`update-alternatives`更改版本后mvn，配置保持不变。

脚步

  1. 安装新版本 mvn

    sudo update-alternatives --install /usr/bin/mvn mvn /opt/maven/apache-maven-3.5.0/bin/mvn 100

  2. 检查替代方案

    $ sudo update-alternatives --config mvn
There are 2 choices for the alternative mvn (providing /usr/bin/mvn).

  Selection    Path                                   Priority   Status
------------------------------------------------------------
* 0            /opt/maven/apache-maven-3.3.9/bin/mvn   100       auto mode
  1            /opt/maven/apache-maven-3.3.9/bin/mvn   100       manual mode
  2            /opt/maven/apache-maven-3.5.0/bin/mvn   10        manual mode

Press enter to keep the current choice[*], or type selection number: 2
update-alternatives: using /opt/maven/apache-maven-3.5.0/bin/mvn to provide /usr/bin/mvn (mvn) in manual mode

  3. 将替代方案更改为新方案

    $ sudo update-alternatives --config mvn
There are 2 choices for the alternative mvn (providing /usr/bin/mvn).

  Selection    Path                                   Priority   Status
------------------------------------------------------------
  0            /opt/maven/apache-maven-3.3.9/bin/mvn   100       auto mode
  1            /opt/maven/apache-maven-3.3.9/bin/mvn   100       manual mode
* 2            /opt/maven/apache-maven-3.5.0/bin/mvn   10        manual mode

Press enter to keep the current choice[*], or type selection number: 2

  4. 检查 mvn 版本

    $ mvn --version
Apache Maven 3.3.9 (bb52d8502b132ec0a5a3f4c09453c07478323dc5; 2015-11-10T17:41:47+01:00)
Maven home: /opt/maven/apache-maven-3.3.9
Java version: 1.8.0_111, vendor: Oracle Corporation
Java home: /opt/java/jdk1.8.0_111/jre
Default locale: ca_ES, platform encoding: UTF-8
OS name: "linux", version: "3.13.0-116-generic", arch: "amd64", family: "unix"

type命令输出：

$ type -a mvn
mvn is /opt/maven/apache-maven-3.3.9/bin/mvn
mvn is /usr/bin/mvn

答案1

我已经修改了~/.profile PATH变量，所以我唯一要做的就是注释掉该行并再次登录。

。轮廓

...
#export PATH=/opt/maven/apache-maven-3.3.9/bin:$PATH
...

答案2

包括手册页和调试命令中的替代方案，只需添加奴隶像这样的选项：

INSTALL_HOME="/opt/maven/apache-maven-3.5.0"

sudo update-alternatives --install "/usr/bin/mvn" "mvn" "${INSTALL_HOME}/bin/mvn" 100 \
  --slave "/usr/bin/mvnDebug" "mvnDebug" "${INSTALL_HOME}/bin/mvnDebug" \
  --slave "/usr/share/man/man1/mvn.1.gz" "mvn.1.gz" "${INSTALL_HOME}/man/mvn.1.gz" \
  --slave "/usr/share/man/man1/mvnDebug.1.gz" "mvnDebug.1.gz" "${INSTALL_HOME}/man/mvnDebug.1.gz"

暗示：如果你的下载不包含手册页，你可以使用帮助2人生成mvn.1.gz然后符号链接mvnDebug.1.gz到它。

cd ${INSTALL_HOME}/man
ln -s mvn.1.gz mvnDebug.1.gz

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