拥有云服务器后的操作-记录

• 查看centos版本号

[root@VM_0_16_centos ~]# cat /etc/redhat-release
CentOS Linux release 7.5.1804 (Core) 

• centos7.5安装mysql
•  centos7.5安装jdk1.8

https://www.cnblogs.com/stulzq/p/9286878.html

[root@VM_0_16_centos java]# wget https://download.oracle.com/otn/java/jdk/8u251-b08/3d5a2bb8f8d4428bbe94aed7ec7ae784/jdk-8u251-linux-x64.tar.gz?AuthParam=1592297658_a57fbe72c2f647fa5445c9c113a15223

1.打开url选择jdk1.8下载

http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

我选择linux x64版本：

2.下载

wget http://download.oracle.com/otn-pub/java/jdk/8u171-b11/512cd62ec5174c3487ac17c61aaa89e8/jdk-8u171-linux-x64.tar.gz?AuthParam=1531155951_4e06a4d17c6c1dbfb8440352e19dd2ae

该下载地址已失效 请自行在官网复制下载地址

下载以后通过命令检查安装包大小是否符合

ls -lht

3.安装

（1）创建安装目录

mkdir /usr/local/java/

（2）解压至安装目录

tar -zxvf jdk-8u171-linux-x64.tar.gz -C /usr/local/java/

4.设置环境变量

打开文件

vim /etc/profile

在末尾添加

export JAVA_HOME=/usr/local/java/jdk1.8.0_171
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH

使环境变量生效

source /etc/profile

添加软链接

ln -s /usr/local/java/jdk1.8.0_171/bin/java /usr/bin/java

检查

java -version

• 查看系统是多少位

[root@VM_0_16_centos ~]# getconf LONG_BIT
64
[root@VM_0_16_centos ~]# file /bin/ls
/bin/ls: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.32, BuildID[sha1]=aaf05615b6c91d3cbb076af81aeff531c5d7dfd9, stripped
[root@VM_0_16_centos ~]# uname -a
Linux VM_0_16_centos 3.10.0-862.el7.x86_64 #1 SMP Fri Apr 20 16:44:24 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

•  安装zookeeper

[root@VM_0_16_centos zookeeper]# wget https://mirrors.bfsu.edu.cn/apache/zookeeper/zookeeper-3.6.1/apache-zookeeper-3.6.1-bin.tar.gz
--2020-06-16 16:58:56--  https://mirrors.bfsu.edu.cn/apache/zookeeper/zookeeper-3.6.1/apache-zookeeper-3.6.1-bin.tar.gz
Resolving mirrors.bfsu.edu.cn (mirrors.bfsu.edu.cn)... 39.155.141.16, 2001:da8:20f:4435:4adf:37ff:fe55:2840
Connecting to mirrors.bfsu.edu.cn (mirrors.bfsu.edu.cn)|39.155.141.16|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 12436328 (12M) [application/octet-stream]
Saving to: ‘apache-zookeeper-3.6.1-bin.tar.gz’

100%[==================================================================================>] 12,436,328  32.0MB/s   in 0.4s   

2020-06-16 16:58:56 (32.0 MB/s) - ‘apache-zookeeper-3.6.1-bin.tar.gz’ saved [12436328/12436328]

•  xsync命令