yum批量安装,超方便的指令,可以批量安装Mysql,Java Development 1. 查看可能批量安装的列表: yum grouplist ? 比如; [root@bogon /]# yum grouplist Loaded plugins: fastestmirror Setting up Group Process Loading mirror speeds from cached hostfilyum批量安装,超方便的指令,可以批量安装Mysql,Java Development1. 查看可能批量安装的列表: yum grouplist比如;
[root@bogon /]# yum grouplist
Loaded plugins: fast...
1、Linux配置Java环境
CentOS系统默认是带有yum(软件包依赖管理工具)的,Ubuntu是apt,macOS是homebrew
yum -y update 升级所有包同时也升级软件和系统内核
yum -y upgrade 只升级所有包,不升级软件和系统内核
安装之前先检查一下系统有没有自带open-jdk
rpm -qa |grep java
rpm -qa |grep jdk
rpm -qa |grep gcj
如果没有输入信息表示没有安装。
如果安装可以使用 rpm -qa | grep java | xargs rpm -e --nodeps 批量卸载所有...
Java环境配置
1 安装JDK
查看CentOS自带JDK是否已安装1[root@test ~]# yum list installed |grep java若有自带安装的JDK,应如下操作进行卸载CentOS系统自带Java环境1
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java version?"1.7.0_181"
OpenJDK Runtime Environment (rhel-2.6.14.8.el6_9-x86_64 u181-b00)
OpenJDK 64-Bit Server VM (build 24.181-b00, mixed mode)
[root@test ~]# yum -y remove java-1.7.0-openjdk*...
1.查看CentOS自带的JDK
yum list installed | grep java
2.卸载自带JDK
java -version
yum -y remove java-1.7.0-openjdk*
yum -y remove tzdata-java.noarch
java -version
3.查看yum库中的Java安装包
yum -y list java*
4.安装JDK
yum -y install java-1.8.0-openjdk*
java -version
1、查找路径[root@master01 jre]# which java
/bin/java
[root@master01 jre]# ls -l /bin/java
lrwxrwxrwx. 1 root root 22 Mar 22 01:01 /bin/java -> /etc/alternatives/java
[root@master01 jre]# ls -l /etc/alternatives/java
lrwxrwxrwx. 1 root root 73 Mar 22 01:01 /etc/alternatives/java -> /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.242.b08-0.el7_7.x86_64/jre/bin/java2、配置JAVE_HOMEvi /etc/profile插入:export J...
系统版本[root@localhost ~]# cat /etc/redhat-release
CentOS Linux release 7.4.1708 (Core) #安装之前先查看一下有无系统自带jdkrpm -qa |grep javarpm -qa |grep jdkrpm -qa |grep gcj#如果有就使用批量卸载命令rpm -qa | grep java | xargs rpm -e --nodeps
直接yum安装1.8.0版本openjdk[root@localhost ~]# yum install java-1.8.0-openjdk* -y查看版本[root@localhost ~]# java -version
openjdk version "1.8.0_161"
Op...
查看CentOS自带JDK是否已安装1[root@test ~]# yum list installed |grep java若有自带安装的JDK,应如下操作进行卸载CentOS系统自带Java环境1
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10[root@test ~]# java -version
java version?"1.7.0_181"
OpenJDK Runtime Environment (rhel-2.6.14.8.el6_9-x86_64 u181-b00)
OpenJDK 64-Bit Server VM (build 24.181-b00, mixed mode)
[root@test ~]# yum -y remove java-1.7.0-openjdk*
[root@test ~]# yum -y ...