CDH快速入门系列(1) | CM的简单介绍及环境准备

[root@hadoop001 ~]# vim /etc/sysconfig/network-scripts/ifcfg-eth0 
// 修改为下列格式
DEVICE=eth0
TYPE=Ethernet
ONBOOT=yes
BOOTPROTO=static
NAME="eth0"
IPADDR=192.168.2.115
PREFIX=24
GATEWAY=192.168.2.2
DNS1=192.168.2.2

[root@hadoop001 ~]# vim /etc/sysconfig/network

改HOSTNAME=那一行

[root@hadoop001 ~]# vim /etc/hosts

[root@hadoop001 ~]# vim /etc/udev/rules.d/70-persistent-net.rules 

[root@hadoop005 ~]# tzselect
Please identify a location so that time zone rules can be set correctly.
Please select a continent or ocean.
 1) Africa
 2) Americas
 3) Antarctica
 4) Arctic Ocean
 5) Asia
 6) Atlantic Ocean
 7) Australia
 8) Europe
 9) Indian Ocean
10) Pacific Ocean
11) none - I want to specify the time zone using the Posix TZ format.
#? 5
Please select a country.
 1) Afghanistan           18) Israel                35) Palestine
 2) Armenia               19) Japan                 36) Philippines
 3) Azerbaijan            20) Jordan                37) Qatar
 4) Bahrain               21) Kazakhstan            38) Russia
 5) Bangladesh            22) Korea (North)         39) Saudi Arabia
 6) Bhutan                23) Korea (South)         40) Singapore
 7) Brunei                24) Kuwait                41) Sri Lanka
 8) Cambodia              25) Kyrgyzstan            42) Syria
 9) China                 26) Laos                  43) Taiwan
10) Cyprus                27) Lebanon               44) Tajikistan
11) East Timor            28) Macau                 45) Thailand
12) Georgia               29) Malaysia              46) Turkmenistan
13) Hong Kong             30) Mongolia              47) United Arab Emirates
14) India                 31) Myanmar (Burma)       48) Uzbekistan
15) Indonesia             32) Nepal                 49) Vietnam
16) Iran                  33) Oman                  50) Yemen
17) Iraq                  34) Pakistan
#? 9
Please select one of the following time zone regions.
1) Beijing Time
2) Xinjiang Time
#? 1

The following information has been given:

        China
        Beijing Time

Therefore TZ='Asia/Shanghai' will be used.
Local time is now:      Thu Oct 18 16:24:23 CST 2018.
Universal Time is now:  Thu Oct 18 08:24:23 UTC 2018.
Is the above information OK?
1) Yes
2) No
#? 1

You can make this change permanent for yourself by appending the line
        TZ='Asia/Shanghai'; export TZ
to the file '.profile' in your home directory; then log out and log in again.

Here is that TZ value again, this time on standard output so that you
can use the /usr/bin/tzselect command in shell scripts:
Asia/Shanghai

[root@hadoop005 ~]# cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime

[root@hadoop005 ~]# sudo date -s '2020-05-22 13:14:00'

[root@hadoop005 ~] setenforce 0

[root@hadoop005 ~] vim /etc/selinux/config

将SELINUX=enforcing 改为SELINUX=disabled

[bigdata@hadoop005 software]$ ssh-keygen -t rsa
[bigdata@hadoop005 software]$ ssh-copy-id hadoop005

// 1.卸载原有mysql
[bigdata@hadoop005 software]$ rpm -qa | grep mysql
[bigdata@hadoop005 software]$ rpm -qa | grep mysql | xargs sudo rpm -e --nodeps

// 1.安装客户端
[bigdata@hadoop005 software]$ sudo rpm -ivh MySQL-client-5.6.24-1.el6.x86_64.rpm 

// 2.安装服务器
[bigdata@hadoop005 software]$ sudo rpm -ivh MySQL-server-5.6.24-1.el6.x86_64.rpm 

// 3. 安装shared
[bigdata@hadoop005 software]$ sudo rpm -ivh MySQL-shared-compat-5.6.41-1.el6.x86_64.rpm 

// 1.启动Mysql
[bigdata@hadoop005 software]$ sudo service mysql start

// 2.查看现密码
[bigdata@hadoop005 software]$ sudo cat /root/.mysql_secret
# The random password set for the root user at Fri May 22 18:15:02 2020 (local time): FRFHhxua231egPGW

[bigdata@hadoop005 software]$ mysql_secure_installation 

// 具体步骤如下
NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MySQL
      SERVERS IN PRODUCTION USE!  PLEASE READ EACH STEP CAREFULLY!

In order to log into MySQL to secure it, we'll need the current
password for the root user.  If you've just installed MySQL, and
you haven't set the root password yet, the password will be blank,
so you should just press enter here.

Enter current password for root (enter for none): `FRFHhxua231egPGW`
OK, successfully used password, moving on...

Setting the root password ensures that nobody can log into the MySQL
root user without the proper authorisation.

You already have a root password set, so you can safely answer 'n'.

Change the root password? [Y/n] 
New password: 
Re-enter new password: 
Password updated successfully!
Reloading privilege tables..
 ... Success!


By default, a MySQL installation has an anonymous user, allowing anyone
to log into MySQL without having to have a user account created for
them.  This is intended only for testing, and to make the installation
go a bit smoother.  You should remove them before moving into a
production environment.

Remove anonymous users? [Y/n] 
 ... Success!

Normally, root should only be allowed to connect from 'localhost'.  This
ensures that someone cannot guess at the root password from the network.

Disallow root login remotely? [Y/n] n
 ... skipping.

By default, MySQL comes with a database named 'test' that anyone can
access.  This is also intended only for testing, and should be removed
before moving into a production environment.

Remove test database and access to it? [Y/n] 
 - Dropping test database...
 ... Success!
 - Removing privileges on test database...
 ... Success!

Reloading the privilege tables will ensure that all changes made so far
will take effect immediately.

Reload privilege tables now? [Y/n] 
 ... Success!

All done!  If you've completed all of the above steps, your MySQL
installation should now be secure.

Thanks for using MySQL!

Cleaning up...

[bigdata@hadoop005 software]$ mysql -uroot -p199712

mysql> use mysql
// 查看
mysql> select user,host,password from user;

// 删除对应的
mysql> delete from user where host='::1';
mysql> delete from user where host='127.0.0.1';
mysql> delete from user where host='hadoop005';

mysql> update user set host="%";
mysql> select user,host,password from user;
mysql> flush privileges;