CentOs Server Environment Setup

CentOs Server Environment Setup

tags (space delimited): Environment build CentOS

 引言：本文档是在全新的CentOs系统搭建JAVA工程相关的服务器环境的指导文档，阅读本文档请使用markdown阅读器，或者在IDE开发工具中安装markdown插件

Step index:

1. Installing the JDK
2. Install Tomcat
3. Installing Nginx
4. Install MySQL
5. Installing Redis

Body Install JDK Check if CentOS has OPENJDK software installed by default, you can use any of the commands in the following command, preferably try:

#rpm -qa |grep java#rpm -qa |grep jdk#rpm -qa |grep gcj

After executing the command, if there is no output, the system does not have the JDK installed and jumps directly to step 2nd, instead, if the output resembles the following result:

java-1.6.0-openjdk-1.6.0.35-1.13.7.1.el6_6.x86_64java-1.6.0-openjdk-1.7.0.35-2.3.7.1.el6_6.x86_64

The system already has OPENJDK installed, we need to uninstall it, and then install Sun's jdk. Uninstall command:

#rpm –e  jdk相关文件名//(普通删除命令，删除特定的包，如果遇到依赖，则无法删除)#rpm -e –nodeps  

Note: The JDK-related file name here refers to the file name of the JDK associated with the query command found in the previous step.

For example:

 #rpm -e java-1.6.0-openjdk-1.6.0.35-1.13.7.1.el6_6.x86_64

If you cannot delete it, you can try the following command:

    #yum -y remove java jdk相关文件名

After executing the above command, use the Find command to see if there are any remaining files:

#find / -name jdk#find / -name java#find / -name jre#find / -name gcj

The query has no effect, indicating that the JDK has been removed cleanly.

If the query out there are also participating in the directory, you can use the # RM-RF directory, the remaining directory one by one deleted.

The removal of the JDK has been completed.

Download and install Sun's JDK package

First, query the number of bits in the current system to determine what bits of JDK to download:

# uname -r

You will see output similar to the following:

2.6.32-358.el6.x86_64

We can see that the system is 64-bit, then we go to search download 64-bit JDK, here we choose to download version 1.6. The downloaded file name is:

Jdk-6u45-linux-x64.bin

We upload the downloaded files to the server's Usr/java directory using the FTP tool (the Java directory is new).

Latest version of JDK download link

Then, in the terminal tools switch to the Java directory, modify the file permissions:

#chmod u+x jdk-6u45-linux-x64-rpm.bin

To perform the installation:

If you can view the Java version number, the installation is successful:

#java -version

3. Configure Environment variables

#vi /etc/profile

At the end add

JAVA_HOME=/usr/java/jdk1.6.0_45 //注意版本号为你刚安装的PATH=$PATH:$JAVA_HOME/binCLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jarexport JAVA_HOMEexport PATHexport CLASSPATH

Execute: Wq save exit and update the configuration file:

#source /etc/profile

At this point, the JDK is installed successfully.

Install tomcat download Tomcat

Latest version of the Tomcat download link

Upload the downloaded file (apache-tomcat-7.0.61.tar.gz) to the server usr/local directory using the FTP tool to switch to the local directory and unzip Tomcat:

#tar -xzvf apache-tomcat-7.0.61.tar.gz

Copy the extracted files to the Usr/tomcat directory:

#cp -R apache-tomcat-7.0.61 /usr/local/tomcat

Start Tomcat

#/usr/local/tomcat/bin/startup.sh

Shutting down the firewall

#/etc/init.d/iptables stop

At this point, the Tomcat installation is configured successfully,

Turn on Apachetomcat and write Apache Tomcat to the boot run queue:

(1, Apache Tomcat start command:

#/usr/local/tomcat/bin/startup.sh

(2apache Tomcat's Stop command:

#/usr/local/tomcat/bin/shutdown.sh

(3, Apache Tomcat boot setting:

#echo "/usr/local/tomcat/bin/startup.sh" >> /etc/rc.local

3. Configuring Tomcat's environment variables
Edit

adding Tomcat Environment parameters

TOMCAT_HOME=/usr/local/tomcatexport PATH JAVA_HOME CLASSPATH TOMCAT_HOME

Save exit, and then execute

Make environment variables effective

Start the Tomcat service now:

#/usr/local/tomcat/bin/startup.sh

then enter

To listen, if you can see 8080 and 80,092, that Tomcat has started normally.

Visit the following test to see if you can access the Web page, enter: http://serverip:8080, you can see the Web page that the Tomcat has been installed successfully.

Install nginx Download Nginx installation package

The latest version of Nginx download link

Before installing Nginx, you need to ensure that the system has g++, GCC, Openssl-devel, Pcre-devel, and Zlib-devel software installed. Installation must be software:

#yum install gcc-c++#yum -y install zlib zlib-devel openssl openssl--devel pcre pcre-devel

Upload the installation package file to/usr/local to do the following:

[[email protected] local]# cd /usr/local[[email protected] local]# tar -zxv -f nginx-1.2.6.tar.gz[[email protected] local]# rm -rf nginx-1.2.6.tar.gz[[email protected] local]# mv nginx-1.2.6 nginx[[email protected] local]# cd /usr/local/nginx[[email protected] nginx]# ./configure --prefix=/usr/local/nginx[[email protected] nginx]# make[[email protected] nginx]# make install

Start

#方法1[[email protected] nginx-1.2.6]# /usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/nginx.conf#方法2[[email protected] nginx-1.2.6]# cd /usr/local/nginx/sbin[[email protected] sbin]# ./nginx

PS: The following error may be reported at startup:

Nginx: [alert] could not open error log file:open () "/usr/local/nginx/logs/error.log" failed (2:no such file or director Y
2015/05/14 15:57:14 [Emerg] 16430#0:open () "/usr/local/nginx/logs/access.log" failed (2:no such file or directory)

Create a new Logs folder under the Nginx folder and start it again.

Test

#测试端口 #netstat –na|grep 80#浏览器中测试 http://ip:80

Install MySQL uninstall legacy MySQL

# rpm -qa | grep mysql　　// 这个命令就会查看该操作系统上是否已经安装了mysql数据库

If there is, we can unload it by rpm-e command or Rpm-e–nodeps command.

# rpm -e mysql　　// 普通删除模式# rpm -e --nodeps mysql　　// 强力删除模式，如果使用上面命令删除时，提示有依赖的其它文件，则用该命令可以对其进行强力删除

After the deletion we can pass Rpm-qa | grep mysql command to see if MySQL has been uninstalled successfully!!

Install MySQL via yum

First we can enter Yum List | grep mysql command to view the downloadable version of the MySQL database available on Yum:

# yum list | grep mysql

Then we can install the MySQL mysql-server mysql-devel by entering the Yum install-y mysql-server mysql mysql-devel command (note: When we installed MySQL, we did not install the MySQL client, which is equivalent to installing the MySQL database, we also need to install the Mysql-server server.

# yum install -y mysql-server mysql mysql-devel

MySQL database initialization and related configuration

We can start our MySQL service by entering the service mysqld Start command

# service mysqld start

When we use MySQL database, we have to start the Mysqld service first, we can through Chkconfig–list | grep mysqld command to see if the MySQL service is booting automatically, such as:

#chkconfig --list | grep mysqld

We found that the MYSQLD service did not start automatically, and of course we can set it to boot up with the Chkconfig mysqld on command, so you don't have to start it manually every time.

#chkconfig mysqld on

After the MySQL database is installed there will only be a root administrator account, but at this time the root account has not set a password for it, so we can use the command to set the password for our root account:

# mysqladmin -u root password ‘njxuqiangmysql‘　　// 通过该命令给root账号设置密码为 njxuqiangmysql

At this point we can log in to our MySQL database via the mysql-u root-p command.

Enter Password:
Welcome to the MySQL Monitor. Commands End With; or \g.
Your MySQL Connection ID is 5
Server version:5.1.73 Source Distribution
Copyright (c) and/or, Oracle, its affiliates. All rights reserved.
Oracle is a registered trademark of the Oracle Corporation and/or its
Affiliates. Other names trademarks of their respective
Owners.
Type ' help ', ' or ' \h ' for help. Type ' \c ' to clear the current input statement.
Mysql>

Installing Redis

wget http://download.redis.io/redis-stable.tar.gztar xvzf redis-stable.tar.gzcd redis-stablemake

After make is successful, make test is required. An exception occurred in make test.

Exception One:

couldn‘t execute "tclsh8.5": no such file or directory

Exception reason: Tcl not installed

Solution:

#yum install -y tcl。

After make succeeds, there are some more executables in the SRC directory: Redis-server,redis-cli and so on.

During the convenient period, the CP command is copied to the USR directory for operation.

#cp redis-server /usr/local/bin/cp redis-cli /usr/local/bin/      

Then create a new directory, store the configuration file

#mkdir /etc/redis#mkdir /var/redis#mkdir /var/redis/log#mkdir /var/redis/run#mkdir /var/redis/6379

Locate the profile template in the Redis solution directory and copy it to the following location.

#cp redis.conf /etc/redis/6379.conf

Modify with vim command

daemonize yespidfile /var/redis/run/redis_6379.pidlogfile /var/redis/log/redis_6379.logdir /var/redis/6379

Finally, run Redis:

 #redis-server /etc/redis/6379.conf

CentOs Server Environment Setup