Centos系统安装Tomcat（Tomcat7,Java8-jdk1.8）

小咪咪 2024-03-27 10:27 76阅读 0赞

以前经常使用java8 也就是java jdk1.8 和tomcat7开发web系统，怀旧记录一下在centos7系统里安装部署tomcat7，同时部署多个tomcat7的方法，解决tomcat7在centos7系统启动很慢的问题

apache tomcat7远离了，在[tomcat官网][tomcat]上已经看不到tomcat7的身影了，我自己也早已不再用tomcat7，在整理曾经的保存的博客和项目时，简单记录一下tomcat7的安装使用过程，将来或许用不到了，或许遇到老项目时还是会用到，因此怀念记录一下tomcat7的安装和配置

首先在官网上找到老版本

https://archive.apache.org/dist/tomcat/

![2743397b80e24d5588b5130e590c5b34.png][]

下载后上传到centos7服务器的/home目录下面

![8ebc36c8d61d4ad9b582d16c8e03f9e0.png][]

解压

tar -xvzf apache-tomcat-7.0.81.tar.gz

修改名称

mv apache-tomcat-7.0.81 tomcat7

启动之前确定当前系统有没有java环境**（java8 jdk1.8）**

[root@myw home]# java -version
    java version "1.8.0_144"
    Java(TM) SE Runtime Environment (build 1.8.0_144-b01)
    Java HotSpot(TM) 64-Bit Server VM (build 25.144-b01, mixed mode)
    [root@myw home]#

启动并确认是否启动成功

[root@myw home]# cd tomcat7/bin
    [root@myw bin]# ls
    bootstrap.jar  catalina.sh         commons-daemon.jar            configtest.bat  daemon.sh   digest.sh         setclasspath.sh  shutdown.sh  startup.sh       tomcat-native.tar.gz  tool-wrapper.sh  version.sh
    catalina.bat   catalina-tasks.xml  commons-daemon-native.tar.gz  configtest.sh   digest.bat  setclasspath.bat  shutdown.bat     startup.bat  tomcat-juli.jar  tool-wrapper.bat      version.bat
    [root@myw bin]# ./startup.sh
    Using CATALINA_BASE:   /home/tomcat7
    Using CATALINA_HOME:   /home/tomcat7
    Using CATALINA_TMPDIR: /home/tomcat7/temp
    Using JRE_HOME:        /usr/local/jdk18
    Using CLASSPATH:       /home/tomcat7/bin/bootstrap.jar:/home/tomcat7/bin/tomcat-juli.jar
    Tomcat started.
    [root@myw bin]# netstat -lnp|grep java
    tcp6       0      0 :::8080                 :::*                    LISTEN      27905/java          
    tcp6       0      0 127.0.0.1:8005          :::*                    LISTEN      27905/java          
    tcp6       0      0 :::8009                 :::*                    LISTEN      27905/java          
    [root@myw bin]#

访问浏览器的8080端口(默认端口)，保证服务器8080端口可访问(系统防火墙和云商安全组配置)

![9af47ab5c3e84e66af3daaf9208e3c78.png][]

关闭停止

[root@myw bin]# ./shutdown.sh
    Using CATALINA_BASE:   /home/tomcat7
    Using CATALINA_HOME:   /home/tomcat7
    Using CATALINA_TMPDIR: /home/tomcat7/temp
    Using JRE_HOME:        /usr/local/jdk18
    Using CLASSPATH:       /home/tomcat7/bin/bootstrap.jar:/home/tomcat7/bin/tomcat-juli.jar
    [root@myw bin]#

查看控制台输出

在tomcat7/logs里

tail -200f catalina.out

[root@myw bin]# cd ..
    [root@myw tomcat7]# ls
    bin  conf  lib  LICENSE  logs  NOTICE  RELEASE-NOTES  RUNNING.txt  temp  webapps  work
    [root@myw tomcat7]# cd logs
    [root@myw logs]# ls
    catalina.2023-01-29.log  catalina.out  host-manager.2023-01-29.log  localhost.2023-01-29.log  localhost_access_log.2023-01-29.txt  manager.2023-01-29.log
    [root@jpmlg4syqgfe22ch logs]# tail -200f catalina.out
    Jan 29, 2023 5:37:22 PM org.apache.catalina.startup.VersionLoggerListener log
    INFO: Server version:        Apache Tomcat/7.0.81
    Jan 29, 2023 5:37:22 PM org.apache.catalina.startup.VersionLoggerListener log
    INFO: Server built:          Aug 11 2017 10:21:27 UTC
    Jan 29, 2023 5:37:22 PM org.apache.catalina.startup.VersionLoggerListener log
    INFO: Server number:         7.0.81.0
    Jan 29, 2023 5:37:22 PM org.apache.catalina.startup.VersionLoggerListener log
    INFO: OS Name:               Linux
    Jan 29, 2023 5:37:22 PM org.apache.catalina.startup.VersionLoggerListener log
    INFO: OS Version:            3.10.0-1160.el7.x86_64
    Jan 29, 2023 5:37:22 PM org.apache.catalina.startup.VersionLoggerListener log
    INFO: Architecture:          amd64
    Jan 29, 2023 5:37:22 PM org.apache.catalina.startup.VersionLoggerListener log
    INFO: Java Home:             /usr/local/jdk18/jre
    Jan 29, 2023 5:37:22 PM org.apache.catalina.startup.VersionLoggerListener log
    INFO: JVM Version:           1.8.0_144-b01
    Jan 29, 2023 5:37:22 PM org.apache.catalina.startup.VersionLoggerListener log
    INFO: JVM Vendor:            Oracle Corporation
    Jan 29, 2023 5:37:22 PM org.apache.catalina.startup.VersionLoggerListener log
    INFO: CATALINA_BASE:         /home/tomcat7
    Jan 29, 2023 5:37:22 PM org.apache.catalina.startup.VersionLoggerListener log
    INFO: CATALINA_HOME:         /home/tomcat7
    Jan 29, 2023 5:37:22 PM org.apache.catalina.startup.VersionLoggerListener log
    INFO: Command line argument: -Djava.util.logging.config.file=/home/tomcat7/conf/logging.properties
    Jan 29, 2023 5:37:22 PM org.apache.catalina.startup.VersionLoggerListener log
    INFO: Command line argument: -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager
    Jan 29, 2023 5:37:22 PM org.apache.catalina.startup.VersionLoggerListener log
    INFO: Command line argument: -Djdk.tls.ephemeralDHKeySize=2048
    Jan 29, 2023 5:37:22 PM org.apache.catalina.startup.VersionLoggerListener log
    INFO: Command line argument: -Djava.endorsed.dirs=/home/tomcat7/endorsed
    Jan 29, 2023 5:37:22 PM org.apache.catalina.startup.VersionLoggerListener log
    INFO: Command line argument: -Dcatalina.base=/home/tomcat7
    Jan 29, 2023 5:37:22 PM org.apache.catalina.startup.VersionLoggerListener log
    INFO: Command line argument: -Dcatalina.home=/home/tomcat7
    Jan 29, 2023 5:37:22 PM org.apache.catalina.startup.VersionLoggerListener log
    INFO: Command line argument: -Djava.io.tmpdir=/home/tomcat7/temp
    Jan 29, 2023 5:37:22 PM org.apache.catalina.core.AprLifecycleListener lifecycleEvent
    INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: /usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
    Jan 29, 2023 5:37:22 PM org.apache.coyote.AbstractProtocol init
    INFO: Initializing ProtocolHandler ["http-bio-8080"]
    Jan 29, 2023 5:37:22 PM org.apache.coyote.AbstractProtocol init
    INFO: Initializing ProtocolHandler ["ajp-bio-8009"]
    Jan 29, 2023 5:37:22 PM org.apache.catalina.startup.Catalina load
    INFO: Initialization processed in 471 ms
    Jan 29, 2023 5:37:22 PM org.apache.catalina.core.StandardService startInternal
    INFO: Starting service Catalina
    Jan 29, 2023 5:37:22 PM org.apache.catalina.core.StandardEngine startInternal
    INFO: Starting Servlet Engine: Apache Tomcat/7.0.81
    Jan 29, 2023 5:37:22 PM org.apache.catalina.startup.HostConfig deployDirectory
    INFO: Deploying web application directory /home/tomcat7/webapps/docs
    Jan 29, 2023 5:37:22 PM org.apache.catalina.startup.HostConfig deployDirectory
    INFO: Deployment of web application directory /home/tomcat7/webapps/docs has finished in 258 ms
    Jan 29, 2023 5:37:22 PM org.apache.catalina.startup.HostConfig deployDirectory
    INFO: Deploying web application directory /home/tomcat7/webapps/host-manager
    Jan 29, 2023 5:37:22 PM org.apache.catalina.startup.HostConfig deployDirectory
    INFO: Deployment of web application directory /home/tomcat7/webapps/host-manager has finished in 74 ms
    Jan 29, 2023 5:37:22 PM org.apache.catalina.startup.HostConfig deployDirectory
    INFO: Deploying web application directory /home/tomcat7/webapps/manager
    Jan 29, 2023 5:37:22 PM org.apache.catalina.startup.HostConfig deployDirectory
    INFO: Deployment of web application directory /home/tomcat7/webapps/manager has finished in 64 ms
    Jan 29, 2023 5:37:22 PM org.apache.catalina.startup.HostConfig deployDirectory
    INFO: Deploying web application directory /home/tomcat7/webapps/ROOT
    Jan 29, 2023 5:37:22 PM org.apache.catalina.startup.HostConfig deployDirectory
    INFO: Deployment of web application directory /home/tomcat7/webapps/ROOT has finished in 46 ms
    Jan 29, 2023 5:37:22 PM org.apache.catalina.startup.HostConfig deployDirectory
    INFO: Deploying web application directory /home/tomcat7/webapps/examples
    Jan 29, 2023 5:37:23 PM org.apache.catalina.startup.HostConfig deployDirectory
    INFO: Deployment of web application directory /home/tomcat7/webapps/examples has finished in 139 ms
    Jan 29, 2023 5:37:23 PM org.apache.coyote.AbstractProtocol start
    INFO: Starting ProtocolHandler ["http-bio-8080"]
    Jan 29, 2023 5:37:23 PM org.apache.coyote.AbstractProtocol start
    INFO: Starting ProtocolHandler ["ajp-bio-8009"]
    Jan 29, 2023 5:37:23 PM org.apache.catalina.startup.Catalina start
    INFO: Server startup in 623 ms

部署多个tomcat7 重新解压并且修改为tomcat7-2

![474f43f4c2ec4601ba79ee4b63381d7f.png][]

两个tomcat同时是无法启动的

<Server port="8005" shutdown="SHUTDOWN">
    ………………………………………………………………………………………………………………
    
        
        <Connector port="8080" protocol="HTTP/1.1"
                   connectionTimeout="20000"
                   redirectPort="8443" />
    
        
        <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />
    
    </Server>

这个是tomcat7conf文件夹下server.xml的配置

tomcat7-2 的改动 8005 改成 8006

8080改成8081

8009改成8010

改的端口可以随意，根据实际需要

启动后

[root@myw ~]# netstat -lnp|grep java
    tcp6       0      0 :::8080                 :::*                    LISTEN      31034/java          
    tcp6       0      0 :::8081                 :::*                    LISTEN      31104/java          
    tcp6       0      0 127.0.0.1:8005          :::*                    LISTEN      31034/java          
    tcp6       0      0 127.0.0.1:8006          :::*                    LISTEN      31104/java          
    tcp6       0      0 :::8009                 :::*                    LISTEN      31034/java          
    tcp6       0      0 :::8010                 :::*                    LISTEN      31104/java          
    [root@myw ~]#

可以看到2个tomcat7都启动了，各自占用三个端口

**但是有些时候在centos7.x下面发现tomcat7启动很慢（有时候等好几分钟），特别是多个tomcat7启动的情况,这里官方和很多博文都有一些说明，说java.security.SecureRandom类要调用还是啥在是在linux（Centos）上，/dev/random和/dev/urandom啥原因，办法是修改一个东西就可以启动很快**

在$JAVA\_PATH/jre/lib/security/java.security目录下的这个文件改东西

![5cdc0d3058dd4056bec125f9385c3569.png][]

打开这个文件后可以看到有一行配置是这样的

securerandom.source=file:/dev/random

#
    # Sun Provider SecureRandom seed source.
    #
    # Select the primary source of seed data for the "SHA1PRNG" and
    # "NativePRNG" SecureRandom implementations in the "Sun" provider.
    # (Other SecureRandom implementations might also use this property.)
    #
    # On Unix-like systems (for example, Solaris/Linux/MacOS), the
    # "NativePRNG" and "SHA1PRNG" implementations obtains seed data from
    # special device files such as file:/dev/random.
    #
    # On Windows systems, specifying the URLs "file:/dev/random" or
    # "file:/dev/urandom" will enable the native Microsoft CryptoAPI seeding
    # mechanism for SHA1PRNG.
    #
    # By default, an attempt is made to use the entropy gathering device
    # specified by the "securerandom.source" Security property.  If an
    # exception occurs while accessing the specified URL:
    #
    #     SHA1PRNG:
    #         the traditional system/thread activity algorithm will be used.
    #
    #     NativePRNG:
    #         a default value of /dev/random will be used.  If neither
    #         are available, the implementation will be disabled.
    #         "file" is the only currently supported protocol type.
    #
    # The entropy gathering device can also be specified with the System
    # property "java.security.egd". For example:
    #
    #   % java -Djava.security.egd=file:/dev/random MainClass
    #
    # Specifying this System property will override the
    # "securerandom.source" Security property.
    #
    # In addition, if "file:/dev/random" or "file:/dev/urandom" is
    # specified, the "NativePRNG" implementation will be more preferred than
    # SHA1PRNG in the Sun provider.
    #
    securerandom.source=file:/dev/random

注释掉修改成

#securerandom.source=file:/dev/random
    securerandom.source=file:/dev/./urandom

这样，tomcat7和tomcat7-2就能快速地启动了（当然，有时候tomcat7不会存在启动慢的问题）

现在启动两个tomcat7只需要端口修改后，就各自是各自的，但是以前曾经记得部署两个tomcat7的时候，jdk有一个path配置

CATALINA\_HOME

CATALINA\_BASE

这个第一个tomcat7可以默认(一般也配置了的)

**1.首先在/etc/profile里和java jdk配置放一起，配置后source /etc/profile指令**

export CATALINA_HOME=/home/tomcat7
    export CATALINA_BASE=/home/tomcat7
    
    export CATALINA2_HOME=/home/tomcat7-2
    export CATALINA2_BASE=/home/tomcat7-2
    
    export JAVA_HOME=/usr/local/jdk18
    export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
    export PATH=$JAVA_HOME/bin:$PATH

**2.tomcat7和tomcat7-2的bin目录下的catalina.sh文件开头处各自增加配置信息**

export CATALINA_BASE=$CATALINA_BASE
    export CATALINA_HOME=$CATALINA_HOME
    
    export CATALINA_BASE=$CATALINA2_BASE
    export CATALINA_HOME=$CATALINA2_HOME

![002efe3ec8f04f7e9e4c7601d95b8e8b.png][]

![0fd6e1af5eff47a6b3579b8b6bf3e7ed.png][]

![487cc31aab5e4ed5bf6298749d518592.png][]

![14488f5c44b247e7bea280a7898f46cf.png][]

两个都配置好后可以关停重启后测试

tomcat配置ssl方式(阿里申请免费也有详细部署方式) 80端口重定向到443端口

-->
        <Connector port="80" protocol="HTTP/1.1"
                   connectionTimeout="20000"
                   redirectPort="443" />
     
        
        <Connector port="443" protocol="org.apache.coyote.http11.Http11Protocol"
                   maxThreads="150" SSLEnabled="true" scheme="https" secure="true"
                   clientAuth="false" sslProtocol="TLS"
                   keystoreFile="/home/tomcat7/conf/xxx-xxxxxxx-com-tomcat-345456.jks"  
                   keystorePass="12345678" />

这个.jks的文件要放在conf同级目录下面

tomcat7的默认编码是ISO-8859-1，习惯性使用UTF-8，那么修改一下配置

URIEncoding="UTF-8"

<Connector port="8080" protocol="HTTP/1.1"
                   connectionTimeout="20000"
                   redirectPort="8443" URIEncoding="UTF-8"/>

当然还有一些其他配置，例如最大线程数，默认不配置大概是200 需要的可以配置maxThreads="1000"，还有一些其他的配置，需要去官网看Connector节点的配置，一般默认已经能够满足需求了

一般tomcat7在centos7.x系统下要配置开机启动，防止系统出现问题重启后tomcat7没启动的情况

首先需要配置java jdk的路径，在tomcat7和tomcat7-2的bin目录下catalina.sh里配置

export JAVA_HOME=/usr/local/jdk18
    export JRE_HOME=/usr/local/jdk18/jre

tomcat7/bin/catalina.sh

![a698614a0f4241a9b38bb455d820d481.png][]

tomcat7-2/bin/catalina.sh

![87208e56a482412a823c0123f4d6fb34.png][]

这里是配置了2个tomcat的，那么需要创建两个tomcat的服务

tomcat7的tomcat7.service

[Unit]
    Description=tomcat7 web server
    After=network.target remote-fs.target nss-lookup.target
    
    [Service]
    Type=forking
    ExecStart=/home/tomcat7/bin/startup.sh
    ExecStop=/home/tomcat7/bin/shutdown.sh
    [Install]
    WantedBy=multi-user.target

tomcat7-2的tomcat7-2.service

[Unit]
    Description=tomcat7-2 web server
    After=network.target remote-fs.target nss-lookup.target
    
    [Service]
    Type=forking
    ExecStart=/home/tomcat7-2/bin/startup.sh
    ExecStop=/home/tomcat7-2/bin/shutdown.sh
    [Install]
    WantedBy=multi-user.target

将tomcat7.service和tomcat7-2.service放在/usr/lib/systemd/system/下面

// service文件有新加和更改都需要重新加载
    systemctl daemon-reload
     
    // 启动
    systemctl start tomcat7.service
    systemctl start tomcat7-2.service 
    
    // 停止
    systemctl stop tomcat7.service
    systemctl stop tomcat7-2.service
     
    // 查看启动状态
    systemctl status tomcat7.service
    systemctl status tomcat7-2.service 
     
    // 加入开机启动
    systemctl enable tomcat7.service
    systemctl enable tomcat7-2.service 
    // 取消开机启动
    systemctl disable tomcat7.service
    systemctl disable tomcat7-2.service

[root@myw ~]# systemctl enable tomcat7.service
    Created symlink from /etc/systemd/system/multi-user.target.wants/tomcat7.service to /usr/lib/systemd/system/tomcat7.service.
    [root@myw ~]# systemctl enable tomcat7-2.service
    Created symlink from /etc/systemd/system/multi-user.target.wants/tomcat7-2.service to /usr/lib/systemd/system/tomcat7-2.service.
    [root@myw ~]# systemctl start tomcat7.service
    [root@myw ~]# systemctl start tomcat7-2.service
    [root@myw ~]# netstat -lnp|grep java
    tcp6       0      0 :::8080                 :::*                    LISTEN      2133/java           
    tcp6       0      0 :::8081                 :::*                    LISTEN      2187/java           
    tcp6       0      0 127.0.0.1:8005          :::*                    LISTEN      2133/java           
    tcp6       0      0 127.0.0.1:8006          :::*                    LISTEN      2187/java           
    tcp6       0      0 :::8009                 :::*                    LISTEN      2133/java           
    tcp6       0      0 :::8010                 :::*                    LISTEN      2187/java           
    [root@myw ~]# systemctl status tomcat7.service
    ?.tomcat7.service - tomcat7 web server
       Loaded: loaded (/usr/lib/systemd/system/tomcat7.service; enabled; vendor preset: disabled)
       Active: active (running) since Tue 2023-01-31 09:52:20 CST; 31s ago
      Process: 2125 ExecStart=/home/tomcat7/bin/startup.sh (code=exited, status=0/SUCCESS)
     Main PID: 2133 (java)
       CGroup: /system.slice/tomcat7.service
               ?..2133 /usr/local/jdk18/jre/bin/java -Djava.util.logging.config.file=/home/tomcat7/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djdk.tls.ephemeralDHKeySize=2048 -Djav...
    
    Jan 31 09:52:20 myw systemd[1]: Starting tomcat7 web server...
    Jan 31 09:52:20 myw startup.sh[2125]: Tomcat started.
    Jan 31 09:52:20 myw systemd[1]: Started tomcat7 web server.
    [root@myw ~]# systemctl stop tomcat7.service
    [root@myw ~]# systemctl stop tomcat7-2.service
    [root@myw ~]# netstat -lnp|grep java
    [root@myw ~]#

如此在centos下安装的两个tomcat7都可以实现开机启动了

[tomcat]: https://tomcat.apache.org/
[2743397b80e24d5588b5130e590c5b34.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/27/a57afbc9d2574ee0b3e40da2bd643860.png
[8ebc36c8d61d4ad9b582d16c8e03f9e0.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/27/44666dcaf1004eb5828c47f3ae2606ff.png
[9af47ab5c3e84e66af3daaf9208e3c78.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/27/f26243bcc9184bb2b8de039ca2d53361.png
[474f43f4c2ec4601ba79ee4b63381d7f.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/27/1649d7c8830e49789299420e2144a317.png
[5cdc0d3058dd4056bec125f9385c3569.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/27/e04e6d63f8aa49f8b722c805a7f7564c.png
[002efe3ec8f04f7e9e4c7601d95b8e8b.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/27/8df3c25a74144e3291b670c93118e74d.png
[0fd6e1af5eff47a6b3579b8b6bf3e7ed.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/27/1b326257be1043fab9de18734f1279f2.png
[487cc31aab5e4ed5bf6298749d518592.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/27/29059122e11d417e97ad59cdadd65538.png
[14488f5c44b247e7bea280a7898f46cf.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/27/2b560ea78f89499c81a0216eceeb703a.png
[a698614a0f4241a9b38bb455d820d481.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/27/8e5169f8cdd0440dad5ba538b9c3a730.png
[87208e56a482412a823c0123f4d6fb34.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/27/6ebab6fb14d7482ea1383608f4501186.png

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安装CentOS7参考之前的文章。一：下载JDK jdk下载地址：[jdk1.8][] 二：上传解压JDK 我使用SSH工具连接到CentOS，然后在/usr/loc

超、凢脫俗/ 2022年04月22日 14:28/ 0 赞/ 293 阅读

相关 centOS7安装JDK1.8

最近总开服务器总要配置jdk，老是不太记得，写个文章记录一下一、检查当前linux系统上是否有jdk，linux命令：rpm -qa | grep java ![wate

男娘i/ 2022年04月04日 10:26/ 0 赞/ 337 阅读

相关 centos7下安装jdk8

一、准备工作卸载OpenJDK 1.查找需要卸载的OpenJDK \[root@itcast01 ~\]\ rpm -qa|grep openjdk|grep -v

绝地灬酷狼/ 2022年03月17日 09:58/ 0 赞/ 301 阅读

相关 centos7下安装jdk8

二、上传jdk到centos下三、检查当前linux系统上是否有jdk，linux命令：rpm -qa | grep java ![180312082287834.png

系统管理员/ 2022年02月03日 05:43/ 0 赞/ 335 阅读

相关 Centos7安装jdk8

1.去官网下载好tar包 2.上传tar包到服务器本人的路径为： /usr/local/appdata/jdk8/ 3.解压tar包命令： tar -x

柔光的暖阳◎/ 2022年01月26日 08:21/ 0 赞/ 314 阅读

相关 Centos7 安装jdk1.8

首先先查看当前系统是否安装java > rpm -qa | grep java > 输完命令后看有没有版本数据如果有使用rpm -e --nodeps 要

野性酷女/ 2021年10月03日 02:08/ 0 赞/ 453 阅读

相关 centos7 安装jdk1.8

（一）安装环境虚拟机centos7 （二）安装步骤 > linux环境下软件的安装有两种类型：yum install 和wget gz（安装包的格式），建

一时失言乱红尘/ 2021年09月15日 22:54/ 0 赞/ 457 阅读