centos6.10 安装pycharm提示java环境错误 centos配置JAVA_HOME centos配置JRE_HOME

Myth丶恋晨 2023-07-15 09:04 4阅读 0赞

检查java版本

[root@nailwl etc]# java -version
    java version "1.7.0_181"
    OpenJDK Runtime Environment (rhel-2.6.14.10.el6-x86_64 u181-b00)
    OpenJDK 64-Bit Server VM (build 24.181-b00, mixed mode)
    [root@nailwl etc]# echo $JAVA_HOME

可以执行，检查$PATH

[root@nailwl etc]# echo $PATH
    /usr/lib64/qt-3.3/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin:/home/nailwl/bin

效果不对，没有JAVA\_HOME和JRE\_HOME，检查java目录。

[root@nailwl etc]# whereis java
    java: /usr/bin/java /etc/java /usr/lib/java /usr/share/java /usr/share/man/man1/java.1.gz
    
    [root@nailwl etc]# which java
    /usr/bin/java
    
    [root@nailwl etc]# ls -lrt /usr/bin/java 
    lrwxrwxrwx. 1 root root 22 Mar 12  2019 /usr/bin/java -> /etc/alternatives/java
    
    [root@nailwl etc]# ls -lrt /etc/alternatives/java
    lrwxrwxrwx. 1 root root 46 Mar 12  2019 /etc/alternatives/java -> /usr/lib/jvm/jre-1.7.0-openjdk.x86_64/bin/java
    
    [root@nailwl etc]# cd /usr/lib/jvm/jre-1.7.0-openjdk.x86_64/bin/
    [root@nailwl bin]# ll
    total 200
    -rwxr-xr-x. 1 root root  9928 Jun 20  2018 java
    -rwxr-xr-x. 1 root root 10056 Jun 20  2018 keytool
    -rwxr-xr-x. 1 root root 10240 Jun 20  2018 orbd
    -rwxr-xr-x. 1 root root 10088 Jun 20  2018 pack200
    -rwxr-xr-x. 1 root root 11400 Jun 20  2018 policytool
    -rwxr-xr-x. 1 root root 10048 Jun 20  2018 rmid
    -rwxr-xr-x. 1 root root 10056 Jun 20  2018 rmiregistry
    -rwxr-xr-x. 1 root root 10072 Jun 20  2018 servertool
    -rwxr-xr-x. 1 root root 10280 Jun 20  2018 tnameserv
    -rwxr-xr-x. 1 root root 91904 Jun 20  2018 unpack200

彻底了解里Linux系统中的java的路径情况，我们开始配置JAVA\_HOME

[root@nailwl bin]# vi /etc/profile
    [root@nailwl bin]# vi /etc/profile
    [root@nailwl bin]# 
    [root@nailwl bin]# 
    [root@nailwl bin]# source /etc/profile
    [root@nailwl bin]# 
    [root@nailwl bin]# 
    [root@nailwl bin]# echo $JAVA_HOME
    /usr/lib/jvm/jre-1.7.0-openjdk.x86_64/bin/java
    [root@nailwl bin]# echo $PATH
    /usr/lib/jvm/jre-1.7.0-openjdk.x86_64/bin/java/bin:/usr/lib/jvm/jre-1.7.0-openjdk.x86_64/bin/java/jre/bin:/usr/lib64/qt-3.3/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin:/home/nailwl/bin
    [root@nailwl bin]#

其中vi /etc/profile之后在最底部追加以下配置信息

export JAVA_HOME=/usr/lib/jvm/jre-1.7.0-openjdk.x86_64/bin/java
    export JRE_HOME=$JAVA_HOME/jre
    export CLASSPATH=$JAVA_HOME/lib:$CLASSPATH
    export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH

贴个/etc/profile文件的最终效果吧，咱是讲究人。

[root@nailwl bin]# cat /etc/profile
    # /etc/profile
    
    # System wide environment and startup programs, for login setup
    # Functions and aliases go in /etc/bashrc
    
    # It's NOT a good idea to change this file unless you know what you
    # are doing. It's much better to create a custom.sh shell script in
    # /etc/profile.d/ to make custom changes to your environment, as this
    # will prevent the need for merging in future updates.
    
    pathmunge () {
        case ":${PATH}:" in
            *:"$1":*)
                ;;
            *)
                if [ "$2" = "after" ] ; then
                    PATH=$PATH:$1
                else
                    PATH=$1:$PATH
                fi
        esac
    }
    
    
    if [ -x /usr/bin/id ]; then
        if [ -z "$EUID" ]; then
            # ksh workaround
            EUID=`/usr/bin/id -u`
            UID=`/usr/bin/id -ru`
        fi
        USER="`/usr/bin/id -un`"
        LOGNAME=$USER
        MAIL="/var/spool/mail/$USER"
    fi
    
    # Path manipulation
    if [ "$EUID" = "0" ]; then
        pathmunge /sbin
        pathmunge /usr/sbin
        pathmunge /usr/local/sbin
    else
        pathmunge /usr/local/sbin after
        pathmunge /usr/sbin after
        pathmunge /sbin after
    fi
    
    HOSTNAME=`/bin/hostname 2>/dev/null`
    HISTSIZE=1000
    if [ "$HISTCONTROL" = "ignorespace" ] ; then
        export HISTCONTROL=ignoreboth
    else
        export HISTCONTROL=ignoredups
    fi
    
    export PATH USER LOGNAME MAIL HOSTNAME HISTSIZE HISTCONTROL
    
    # By default, we want umask to get set. This sets it for login shell
    # Current threshold for system reserved uid/gids is 200
    # You could check uidgid reservation validity in
    # /usr/share/doc/setup-*/uidgid file
    if [ $UID -gt 199 ] && [ "`/usr/bin/id -gn`" = "`/usr/bin/id -un`" ]; then
        umask 002
    else
        umask 022
    fi
    
    for i in /etc/profile.d/*.sh ; do
        if [ -r "$i" ]; then
            if [ "${-#*i}" != "$-" ]; then
                . "$i"
            else
                . "$i" >/dev/null 2>&1
            fi
        fi
    done
    
    unset i
    unset -f pathmunge
    
    
    export JAVA_HOME=/usr/lib/jvm/jre-1.7.0-openjdk.x86_64/bin/java
    export JRE_HOME=$JAVA_HOME/jre
    export CLASSPATH=$JAVA_HOME/lib:$CLASSPATH
    export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH