红联Linux门户
Linux帮助

【Centos7】卸载OpenJDK

发布时间:2017-02-25 10:14:55来源:linux网站作者:放心飞吧
一般情况下,centos会自带OpenJDK,Hadoop的运行环境要求自己配置JRE,但在home下配置好了JRE后,使用Java -version仍然看到OpenJDK,原因是系统根据$PATH路径,首先会在/usr/bin/中找到OpenJDK的java,并非我们自己配置的JDK。
 
解决办法有两种:
1.配置/etc/profile使/home/xxx/jdk/bin首先被找到。
2.卸载OpenJDK。
这里推荐第二种。
 
1.查看安装了哪些OpenJDK
[root@master1 bin]# rpm -qa | grep jdk
 
2.卸载OpenJDK
[root@master1 bin]# yum -y remove java-1.8.0-open*
 
3.这时在/usr/bin中已经没有java了
 
4.使用java -version看到了自己配置的JDK,这里已经成功卸载
[hadoop@master1 ~]$ java -version
java version "1.8.0_111"
Java(TM) SE Runtime Environment (build 1.8.0_111-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.111-b14, mixed mode)
 
5.这一步可以不看了,仅仅是通过卸载记录来研究OpenJDK的RPM包依赖关系
[oracle@hadoop ~]$ yum -y remove java-1.8.0-openjdk*
Loaded plugins: fastestmirror
Repodata is over 2 weeks old. Install yum-cron? Or run: yum makecache fast
You need to be root to perform this command.
[oracle@hadoop ~]$ su
Password: 
[root@hadoop oracle]# yum -y remove java-1.8.0-openjdk*
Loaded plugins: fastestmirror
Repodata is over 2 weeks old. Install yum-cron? Or run: yum makecache fast
Resolving Dependencies
--> Running transaction check
---> Package java-1.8.0-openjdk-headless.x86_64 1:1.8.0.111-2.b15.el7_3 will be erased
--> Processing Dependency: java-headless >= 1:1.6 for package: 1:libreoffice-core-5.0.6.2-3.el7.x86_64
--> Processing Dependency: libjvm.so()(64bit) for package: 1:libreoffice-ure-5.0.6.2-3.el7.x86_64
--> Running transaction check
---> Package libreoffice-core.x86_64 1:5.0.6.2-3.el7 will be erased
--> Processing Dependency: libavmedialo.so()(64bit) for package: 1:libreoffice-calc-5.0.6.2-3.el7.x86_64
---> Package libreoffice-ure.x86_64 1:5.0.6.2-3.el7 will be erased
--> Running transaction check
---> Package libreoffice-calc.x86_64 1:5.0.6.2-3.el7 will be erased
---> Package libreoffice-draw.x86_64 1:5.0.6.2-3.el7 will be erased
---> Package libreoffice-graphicfilter.x86_64 1:5.0.6.2-3.el7 will be erased
---> Package libreoffice-impress.x86_64 1:5.0.6.2-3.el7 will be erased
---> Package libreoffice-pdfimport.x86_64 1:5.0.6.2-3.el7 will be erased
---> Package libreoffice-pyuno.x86_64 1:5.0.6.2-3.el7 will be erased
---> Package libreoffice-writer.x86_64 1:5.0.6.2-3.el7 will be erased
---> Package unoconv.noarch 0:0.6-7.el7 will be erased
--> Finished Dependency Resolution
Dependencies Resolved
Package  Arch  Version  Repository  Size
Removing:
java-1.8.0-openjdk-headless  x86_64  1:1.8.0.111-2.b15.el7_3   @updates  102 M
Removing for dependencies:
libreoffice-calc             x86_64  1:5.0.6.2-3.el7           @base      29 M
libreoffice-core             x86_64  1:5.0.6.2-3.el7           @base     238 M
libreoffice-draw             x86_64  1:5.0.6.2-3.el7           @base     2.2 M
libreoffice-graphicfilter    x86_64  1:5.0.6.2-3.el7           @base     1.3 M
libreoffice-impress          x86_64  1:5.0.6.2-3.el7           @base     4.8 M
libreoffice-pdfimport        x86_64  1:5.0.6.2-3.el7           @base     545 k
libreoffice-pyuno            x86_64  1:5.0.6.2-3.el7           @base     1.9 M
libreoffice-ure              x86_64  1:5.0.6.2-3.el7           @base     6.8 M
libreoffice-writer           x86_64  1:5.0.6.2-3.el7           @base      15 M
unoconv                      noarch  0.6-7.el7                 @base     196 k
Transaction Summary
Remove  1 Package (+10 Dependent packages)
Installed size: 402 M
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Erasing    : unoconv-0.6-7.el7.noarch                                    1/11 
Erasing    : 1:libreoffice-calc-5.0.6.2-3.el7.x86_64                     2/11 
Erasing    : 1:libreoffice-impress-5.0.6.2-3.el7.x86_64                  3/11 
Erasing    : 1:libreoffice-writer-5.0.6.2-3.el7.x86_64                   4/11 
Erasing    : 1:libreoffice-draw-5.0.6.2-3.el7.x86_64                     5/11 
Erasing    : 1:libreoffice-pdfimport-5.0.6.2-3.el7.x86_64                6/11 
Erasing    : 1:libreoffice-graphicfilter-5.0.6.2-3.el7.x86_64            7/11 
Erasing    : 1:libreoffice-pyuno-5.0.6.2-3.el7.x86_64                    8/11 
Erasing    : 1:libreoffice-core-5.0.6.2-3.el7.x86_64                     9/11 
Erasing    : 1:libreoffice-ure-5.0.6.2-3.el7.x86_64                     10/11 
Erasing    : 1:java-1.8.0-openjdk-headless-1.8.0.111-2.b15.el7_3.x86_   11/11 
failed to read link /usr/bin/java: No such file or directory
Verifying  : 1:libreoffice-writer-5.0.6.2-3.el7.x86_64                   1/11 
Verifying  : 1:libreoffice-impress-5.0.6.2-3.el7.x86_64                  2/11 
Verifying  : 1:libreoffice-pdfimport-5.0.6.2-3.el7.x86_64                3/11 
Verifying  : 1:libreoffice-core-5.0.6.2-3.el7.x86_64                     4/11 
Verifying  : 1:libreoffice-calc-5.0.6.2-3.el7.x86_64                     5/11 
Verifying  : 1:libreoffice-draw-5.0.6.2-3.el7.x86_64                     6/11 
Verifying  : 1:libreoffice-graphicfilter-5.0.6.2-3.el7.x86_64            7/11 
Verifying  : 1:libreoffice-pyuno-5.0.6.2-3.el7.x86_64                    8/11 
Verifying  : unoconv-0.6-7.el7.noarch                                    9/11 
Verifying  : 1:libreoffice-ure-5.0.6.2-3.el7.x86_64                     10/11 
Verifying  : 1:java-1.8.0-openjdk-headless-1.8.0.111-2.b15.el7_3.x86_   11/11
Removed:
java-1.8.0-openjdk-headless.x86_64 1:1.8.0.111-2.b15.el7_3
Dependency Removed:
libreoffice-calc.x86_64 1:5.0.6.2-3.el7
libreoffice-core.x86_64 1:5.0.6.2-3.el7
libreoffice-draw.x86_64 1:5.0.6.2-3.el7
libreoffice-graphicfilter.x86_64 1:5.0.6.2-3.el7
libreoffice-impress.x86_64 1:5.0.6.2-3.el7
libreoffice-pdfimport.x86_64 1:5.0.6.2-3.el7
libreoffice-pyuno.x86_64 1:5.0.6.2-3.el7
libreoffice-ure.x86_64 1:5.0.6.2-3.el7
libreoffice-writer.x86_64 1:5.0.6.2-3.el7
unoconv.noarch 0:0.6-7.el7
Complete!
[root@hadoop oracle]#
通过记录可以看出 libreoffice这个软件是基于JAVA的,卸载OpenJDK后,libreoffice就不能用了,节省了402M的磁盘空间。
 
本文永久更新地址:http://www.linuxdiyf.com/linux/28684.html