安装JDK

安装步骤

  • mkdir /opt/jdk
  • 通过 xftp6 上传到 /opt/jdk 下
  • cd /opt/jdk
  • 解压 tar -zxvf jdk-8u261-linux-x64.tar.gz
  • mkdir /usr/local/java
  • mv /opt/jdk/jdk1.8.0_261 /usr/local/java
  • 配置环境变量的配置文件
  • vim /etc/profile
  • export JAVA_HOME=/usr/local/java/jdk1.8.0_261
  • export PATH=$JAVA_HOME/bin:$PATH
  • source /etc/profile [让新的环境变量生效] ``` [root@localhost etc]# cat profile export JAVA_HOME=/usr/local/java/jdk1.8.0_261 export PATH=$JAVA_HOME/bin:$PATH

    /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

  1.     # ksh workaround
  2.     EUID=`/usr/bin/id -u`
  3.     UID=`/usr/bin/id -ru`
  4. fi
  5. USER="`/usr/bin/id -un`"
  6. LOGNAME=$USER
  7. MAIL="/var/spool/mail/$USER"

fi

Path manipulation

if [ “$EUID” = “0” ]; then pathmunge /usr/sbin pathmunge /usr/local/sbin else pathmunge /usr/local/sbin after pathmunge /usr/sbin after fi

HOSTNAME=/usr/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 /etc/profile.d/sh.local ; do if [ -r “$i” ]; then if [ “${-#i}” != “$-“ ]; then . “$i” else . “$i” >/dev/null fi fi done

unset i unset -f pathmunge [root@localhost etc]# source /etc/profile [root@localhost etc]# java -version java version “1.8.0_261” Java(TM) SE Runtime Environment (build 1.8.0_261-b12) Java HotSpot(TM) 64-Bit Server VM (build 25.261-b12, mixed mode)

  1. <a name="b4OZB"></a>
  2. ## 检查
  3. java -version
  4. <a name="lA4Ke"></a>
  5. ## 注意事项 
  6. 检查系统是否已安装了系统默认的openJDK，若有需要先卸载再安装jdk

查看是否已安装jdk

[root@localhost etc]# rpm -qa |grep java java-1.8.0-openjdk-headless-1.8.0.181-7.b13.el7.x86_64 python-javapackages-3.4.1-11.el7.noarch javapackages-tools-3.4.1-11.el7.noarch java-1.8.0-openjdk-1.8.0.181-7.b13.el7.x86_64 java-1.7.0-openjdk-headless-1.7.0.191-2.6.15.5.el7.x86_64 java-1.7.0-openjdk-1.7.0.191-2.6.15.5.el7.x86_64 tzdata-java-2018e-3.el7.noarch [root@localhost etc]# java -version openjdk version “1.8.0_181” OpenJDK Runtime Environment (build 1.8.0_181-b13) OpenJDK 64-Bit Server VM (build 25.181-b13, mixed mode)

卸载openjdk

[root@localhost etc]# yum remove openjdk 已加载插件：fastestmirror, langpacks 正在解决依赖关系 —> 正在检查事务 —-> 软件包 java-1.7.0-openjdk.x86_64.1.1.7.0.191-2.6.15.5.el7 将被 删除 … 作为依赖被删除: icedtea-web.x86_64 0:1.7.1-1.el7 jline.noarch 0:1.0-8.el7 rhino.noarch 0:1.7R5-1.el7

完毕！

检查是否卸载成功

[root@localhost etc]# java -version -bash: /usr/bin/java: 没有那个文件或目录

  1. <a name="ju5st"></a>
  2. # 安装tomcat
  3. <a name="DnkG6"></a>
  4. ## 步骤
  6. - 上传安装文件，并解压缩到/opt/tomcat
  7. - 进入解压目录/bin ,  启动 tomcat    ./startup.sh
  8. - 开放端口 8080 ,  回顾 firewall-cmd

[root@localhost opt]# mkdir /opt/tomcat [root@localhost opt]# cd tomcat/ [root@localhost tomcat]# tar -zxvf apache-tomcat-8.5.59.tar.gz [root@localhost tomcat]# ll 总用量 10192 drwxr-xr-x. 9 root root 4096 1月 19 14:24 apache-tomcat-8.5.59 -rw-r—r—. 1 root root 10432020 1月 19 09:52 apache-tomcat-8.5.59.tar.gz [root@localhost tomcat]# cd apache-tomcat-8.5.59/bin/ [root@localhost bin]# ./startup.sh Using CATALINA_BASE: /opt/tomcat/apache-tomcat-8.5.59 Using CATALINA_HOME: /opt/tomcat/apache-tomcat-8.5.59 Using CATALINA_TMPDIR: /opt/tomcat/apache-tomcat-8.5.59/temp Using JRE_HOME: /usr/local/java/jdk1.8.0_261 Using CLASSPATH: /opt/tomcat/apache-tomcat-8.5.59/bin/bootstrap.jar:/opt/tomcat/apache-tomcat-8.5.59/bin/tomcat-juli.jar Using CATALINA_OPTS:
Tomcat started. [root@localhost bin]# netstat -anp |grep 8080 tcp6 0 0 :::8080 :::* LISTEN 54597/java
[root@localhost bin]# firewall-cmd —permanent —add-port=8080/tcp success [root@localhost bin]# firewall-cmd —reload success

  1. <a name="TQVeL"></a>
  2. ## 测试是否安装成功
  3. windos、Linux下访问 [http://192.168.200.130:8080/](http://192.168.200.130:8080/)<br />![image.png](https://cdn.nlark.com/yuque/0/2022/png/2608713/1642574884146-7df8caa6-d5c0-4e81-996f-d1ddb3d60825.png#clientId=ue8d8562f-6f1f-4&crop=0&crop=0&crop=1&crop=1&from=paste&height=239&id=ua0edca4d&margin=%5Bobject%20Object%5D&name=image.png&originHeight=477&originWidth=1858&originalType=binary&ratio=1&rotation=0&showTitle=false&size=152449&status=done&style=none&taskId=u58e32cd7-e360-45fa-8fd3-404d599f270&title=&width=929)
  4. <a name="d3Wgu"></a>
  5. # 安装idea
  7. - 下载地址: [https://www.jetbrains.com/idea/download/#section=windows](https://www.jetbrains.com/idea/download/#section=windows)
  8. - 解压缩到/opt/idea
  9. - 启动 idea bin 目录下 ./idea.sh，配置 jdk
  10. <a name="dTtdA"></a>
  11. # 安装mysql
  12. 新建文件夹/opt/mysql，并cd进去<br />运行wget [http://dev.mysql.com/get/mysql-5.7.26-1.el7.x86_64.rpm-bundle.tar](http://dev.mysql.com/get/mysql-5.7.26-1.el7.x86_64.rpm-bundle.tar)，下载mysql安装包<br />PS：centos7.6自带的类mysql数据库是mariadb，会跟mysql冲突，要先删除。 <br />运行tar -xvf mysql-5.7.26-1.el7.x86_64.rpm-bundle.tar<br />运行rpm -qa|grep mari，查询mariadb相关安装包<br />运行rpm -e --nodeps mariadb-libs，卸载然后开始真正安装mysql，依次运行以下几条<br />rpm -ivh mysql-community-common-5.7.26-1.el7.x86_64.rpm<br />rpm -ivh mysql-community-libs-5.7.26-1.el7.x86_64.rpm<br />rpm -ivh mysql-community-client-5.7.26-1.el7.x86_64.rpm<br />rpm -ivh mysql-community-server-5.7.26-1.el7.x86_64.rpm<br />运行systemctl start mysqld.service，启动mysql<br />然后开始设置root用户密码<br />Mysql自动给root用户设置随机密码，运行grep "password" /var/log/mysqld.log可看到当前密码<br />运行mysql -u root  -p，用root用户登录，提示输入密码可用上述的，可以成功登陆进入mysql命令行<br />设置root密码，对于个人开发环境，如果要设比较简单的密码（生产环境服务器要设复杂密码），可以运行set global validate_password_policy=0;  提示密码设置策略（validate_password_policy默认值1，）<br />set password for 'root'@'localhost' =password('hspedu100');<br />运行flush privileges;使密码设置生效
  13. ```shell
  14. [root@localhost ~]# mkdir /opt/mysql
  15. [root@localhost ~]# mv 下载/mysql-5.7.26-1.el7.x86_64.rpm-bundle.tar  /opt/mysql/
  16. [root@localhost ~]# cd /opt/mysql/
  17. [root@localhost mysql]# ll
  18. 总用量 518444
  19. -rw-r--r--. 1 root root 530882560 1月  19 09:53 mysql-5.7.26-1.el7.x86_64.rpm-bundle.tar
  20. [root@localhost mysql]# tar -xvf mysql-5.7.26-1.el7.x86_64.rpm-bundle.tar 
  21. mysql-community-embedded-devel-5.7.26-1.el7.x86_64.rpm
  22. mysql-community-libs-5.7.26-1.el7.x86_64.rpm
  23. mysql-community-embedded-5.7.26-1.el7.x86_64.rpm
  24. mysql-community-test-5.7.26-1.el7.x86_64.rpm
  25. mysql-community-embedded-compat-5.7.26-1.el7.x86_64.rpm
  26. mysql-community-common-5.7.26-1.el7.x86_64.rpm
  27. mysql-community-devel-5.7.26-1.el7.x86_64.rpm
  28. mysql-community-client-5.7.26-1.el7.x86_64.rpm
  29. mysql-community-server-5.7.26-1.el7.x86_64.rpm
  30. mysql-community-libs-compat-5.7.26-1.el7.x86_64.rpm
  31. [root@localhost mysql]# ll
  32. 总用量 1036900
  33. -rw-r--r--. 1 root root  530882560 1月  19 09:53 mysql-5.7.26-1.el7.x86_64.rpm-bundle.tar
  34. -rw-r--r--. 1 7155 31415  25381952 4月  15 2019 mysql-community-client-5.7.26-1.el7.x86_64.rpm
  35. -rw-r--r--. 1 7155 31415    280904 4月  15 2019 mysql-community-common-5.7.26-1.el7.x86_64.rpm
  36. -rw-r--r--. 1 7155 31415   3838100 4月  15 2019 mysql-community-devel-5.7.26-1.el7.x86_64.rpm
  37. -rw-r--r--. 1 7155 31415  47076368 4月  15 2019 mysql-community-embedded-5.7.26-1.el7.x86_64.rpm
  38. -rw-r--r--. 1 7155 31415  24086952 4月  15 2019 mysql-community-embedded-compat-5.7.26-1.el7.x86_64.rpm
  39. -rw-r--r--. 1 7155 31415 130023844 4月  15 2019 mysql-community-embedded-devel-5.7.26-1.el7.x86_64.rpm
  40. -rw-r--r--. 1 7155 31415   2274268 4月  15 2019 mysql-community-libs-5.7.26-1.el7.x86_64.rpm
  41. -rw-r--r--. 1 7155 31415   2118444 4月  15 2019 mysql-community-libs-compat-5.7.26-1.el7.x86_64.rpm
  42. -rw-r--r--. 1 7155 31415 173541272 4月  15 2019 mysql-community-server-5.7.26-1.el7.x86_64.rpm
  43. -rw-r--r--. 1 7155 31415 122249684 4月  15 2019 mysql-community-test-5.7.26-1.el7.x86_64.rpm
  44. [root@localhost mysql]# rpm -qa |grep mari
  45. mariadb-libs-5.5.60-1.el7_5.x86_64
  46. marisa-0.2.4-4.el7.x86_64
  47. [root@localhost mysql]# rpm -e --nodeps mariadb-libs
  48. [root@localhost mysql]# rpm -qa |grep mari
  49. marisa-0.2.4-4.el7.x86_64
  50. [root@localhost mysql]# rpm -ivh mysql-community-common-5.7.26-1.el7.x86_64.rpm 
  51. 警告：mysql-community-common-5.7.26-1.el7.x86_64.rpm: 头V3 DSA/SHA1 Signature, 密钥 ID 5072e1f5: NOKEY
  52. 准备中...                          ################################# [100%]
  53. 正在升级/安装...
  54.    1:mysql-community-common-5.7.26-1.e################################# [100%]
  55. [root@localhost mysql]# rpm -ivh mysql-community-libs-5.7.26-1.el7.x86_64.rpm 
  56. 警告：mysql-community-libs-5.7.26-1.el7.x86_64.rpm: 头V3 DSA/SHA1 Signature, 密钥 ID 5072e1f5: NOKEY
  57. 准备中...                          ################################# [100%]
  58. 正在升级/安装...
  59.    1:mysql-community-libs-5.7.26-1.el7################################# [100%]
  60. [root@localhost mysql]# rpm -ivh mysql-community-client-5.7.26-1.el7.x86_64.rpm 
  61. 警告：mysql-community-client-5.7.26-1.el7.x86_64.rpm: 头V3 DSA/SHA1 Signature, 密钥 ID 5072e1f5: NOKEY
  62. 准备中...                          ################################# [100%]
  63. 正在升级/安装...
  64.    1:mysql-community-client-5.7.26-1.e################################# [100%]
  65. [root@localhost mysql]# rpm -ivh mysql-community-server-5.7.26-1.el7.x86_64.rpm 
  66. 警告：mysql-community-server-5.7.26-1.el7.x86_64.rpm: 头V3 DSA/SHA1 Signature, 密钥 ID 5072e1f5: NOKEY
  67. 准备中...                          ################################# [100%]
  68. 正在升级/安装...
  69.    1:mysql-community-server-5.7.26-1.e################################# [100%]
  70. [root@localhost mysql]# systemctl start mysqld.service
  71. [root@localhost mysql]# grep "password" /var/log/mysqld.log
  72. 2022-01-20T06:33:30.813358Z 1 [Note] A temporary password is generated for root@localhost: F#lyhwG8ninl
  73. [root@localhost mysql]# mysql -u root -p
  74. Enter password: 
  75. Welcome to the MySQL monitor.  Commands end with ; or \g.
  76. Your MySQL connection id is 2
  77. Server version: 5.7.26
  79. Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
  81. Oracle is a registered trademark of Oracle Corporation and/or its
  82. affiliates. Other names may be trademarks of their respective
  83. owners.
  85. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
  87. mysql> set global validate_password_policy=0;
  88. Query OK, 0 rows affected (0.00 sec)
  90. mysql> set password for 'root'@'localhost'=password('root');
  91. ERROR 1819 (HY000): Your password does not satisfy the current policy requirements
  92. mysql> set password for 'root'@'localhost'=password('123456');
  93. ERROR 1819 (HY000): Your password does not satisfy the current policy requirements
  94. mysql> SHOW VARIABLES LIKE 'validate_password%';
  95. ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
  96. mysql> set global validate_password_length=1;
  97. Query OK, 0 rows affected (0.01 sec)
  99. mysql> SHOW VARIABLES LIKE 'validate_password%';
  100. ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
  101. mysql> set global validate_password_policy=0;
  102. Query OK, 0 rows affected (0.00 sec)
  104. mysql>  set password for 'root'@'localhost'=password('123456');
  105. Query OK, 0 rows affected, 1 warning (0.02 sec)
  107. mysql> flush privileges;
  108. Query OK, 0 rows affected (0.00 sec)
  110. mysql> exit
  111. Bye
  112. [root@localhost mysql]# mysql -u root -p
  113. Enter password: 
  114. Welcome to the MySQL monitor.  Commands end with ; or \g.
  115. Your MySQL connection id is 3
  116. Server version: 5.7.26 MySQL Community Server (GPL)
  118. Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
  120. Oracle is a registered trademark of Oracle Corporation and/or its
  121. affiliates. Other names may be trademarks of their respective
  122. owners.
  124. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
  126. mysql> exit
  127. Bye