环境 centos + Xshell5
1下载jdk
https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html(
或者我云盘链接:https://pan.baidu.com/s/1dsPvnVzBSgGZiRJeAEo0VA 密码:4uit)
2上传到服务器解压安装包
root@instance-xbnz53gx:/home/java# tar -zxvf jdk-8u181-linux-x64.tar.gz
3修改环境变量
root@instance-xbnz53gx:/home/java# vim /etc/profile
扩展只是如果没有vim下面指令安装下
root@instance-xbnz53gx:/home/java# apt-get install vim-gtk
按键 i 进入编辑,把下面的配置复制进去。按键:wq 退出并保存
export JAVA_HOME=/home/java/jdk1.8.0_181
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib:$CLASSPATH
export JAVA_PATH=${JAVA_HOME}/bin:${JRE_HOME}/bin
export PATH=$PATH:${JAVA_PATH}
4 刷新额配置source /etc/profile
root@instance-xbnz53gx:/home/java# source /etc/profile
root@instance-xbnz53gx:/home/java# java
Usage: java [-options] class [args...]
(to execute a class)
or java [-options] -jar jarfile [args...]
(to execute a jar file)
where options include:
-d32 use a 32-bit data model if available
-d64 use a 64-bit data model if available
-server to select the "server" VM
The default VM is server.
-cp <class search path of directories and zip/jar files>
-classpath <class search path of directories and zip/jar files>
A : separated list of directories, JAR archives,
and ZIP archives to search for class files.
-D<name>=<value>
set a system property
-verbose:[class|gc|jni]
enable verbose output
-version print product version and exit
-version:<value>
Warning: this feature is deprecated and will be removed
in a future release.
require the specified version to run
-showversion print product version and continue
-jre-restrict-search | -no-jre-restrict-search
Warning: this feature is deprecated and will be removed
in a future release.
include/exclude user private JREs in the version search
-? -help print this help message
-X print help on non-standard options
-ea[:<packagename>...|:<classname>]
-enableassertions[:<packagename>...|:<classname>]
enable assertions with specified granularity
-da[:<packagename>...|:<classname>]
-disableassertions[:<packagename>...|:<classname>]
disable assertions with specified granularity
-esa | -enablesystemassertions
enable system assertions
-dsa | -disablesystemassertions
disable system assertions
-agentlib:<libname>[=<options>]
load native agent library <libname>, e.g. -agentlib:hprof
see also, -agentlib:jdwp=help and -agentlib:hprof=help
-agentpath:<pathname>[=<options>]
load native agent library by full pathname
-javaagent:<jarpath>[=<options>]
load Java programming language agent, see java.lang.instrument
-splash:<imagepath>
show splash screen with specified image
See http://www.oracle.com/technetwork/java/javase/documentation/index.html for more details.