"Source" self-learning Hadoop from zero: Linux preparation

Read Catalogue

• Order
• Check List
• Common Linux Commands
• Build the Environment
• Series Index

This article is copyright Mephisto and Blog Park is shared, welcome reprint, but must retain this paragraph statement, and give the original link, thank you for your cooperation.

The article is written by elder brother (Mephisto), Sourcelink

Order

In the previous step, we have prepared 4 virtual machines, namely h30,h31,h32,h33. where H30 for our Ambari server, H31 for Namenode server, h32,h33 for our Datanode server.

Next, we have to prepare the Linux environment for these virtual machines.

Check List

1. Network access

2. Firewall

3. Hosts

4. Vim

5. Yum

6. SSH

7. JDK

8. Time synchronization

Common Linux Commands

1. Enter the catalogue cd/etc

A slash is an absolute path, and if not, it goes to the subdirectory under the current directory.

2. Enumerate the directory structure Ls-al

3. View the contents of the file cat/etc/hosts

4. Modify a file vi/etc/hosts

Vim/etc/hosts

5. Restart reboot

6. Right to power Su root

Sudo

7. Start Service ntpd start

8. View service status Services NTPD status

9. Close Service NTPD Stop

10. Boot from Chkconfig ntpd on

11. Delete Files Rm/var/www/html/abc

12. Delete Folder Rm-rf/var/www/html/aa

13. SSH login ssh [email protected]

SSH h31

14, modify files, folder permissions chmod 700/VAR/WWW/HTML/AA

15. Copy file and rename cat id_rsa.pub >>authorized_keys

16. View Package Status Rpm-qa|grep SSH

17. Yum Installs yum install SSH

18. Copy files and folders to other machines scp/root/.ssh [email protected]:/root/.ssh/

19. Check the machine name hostname

20, check IP and other information ifconfig

Build the Environment

One: Using Xshell 4 Login h30-New Session Xshell is a powerful secure terminal emulation software that supports SSH1, SSH2, and the Telnet protocol of the Microsoft Windows platform.　　Two: Use Xshell 4 login h30-Connect session Three: Use Xshell 4 login h30-Enter password Remember login name, remember password (play with your own deployment, remember password very save time) Four: Modify the font size, encoding format and other shortcut bar, click the icon like the ball, select UTF-8 Click the letter icon on the shortcut bar, and change the font to 14. The word small too hurts the eye, according to oneself appropriate change. Five: Turn off the firewall

#关闭防火墙service iptables stop# Permanently shut down the firewall chkconfig iptables off# View firewall status service iptables status

Vi.: Close SELinux

/etc/selinux/config# Change State selinux=disabled

If you are unfamiliar with VI vim here, check the command on the Internet. I'll just do a brief introduction:

Vim divided into 3 modes, browse, edit, input commands

Shift+i or shift+o can enter edit mode, ESC can exit edit mode

In the browse mode input: Is can enter the command, for example: Q exit,: q! do not save exit,: Wq Save exit

Seven: Uninstall OpenJDK, install Sun's JDK (now called Oracle)

-qa| grep Java
#卸载openJDK
Rpm-e--nodeps file name

We can't check the installation here, so we can install the JDK directly.

/varmkdir -P  www/html

Use xftp 4 to upload the downloaded JDK to H30, or click the Xshell xftp link.

/var/www/-IVH jdk-7u67-linux-x64.rpm

#查看版本
Java-version

Eight: Modify the hosts

This is to be changed in every system.

#编辑hosts     /etc/hosts

Nine: SSH settings

Enter H30 to see if SSH is installed, and if so, continue without installation.

rpm-qa| grep SSH

Create the. SSH directory. Viewing the file, the first letter D is a directory, followed by permissions, such as the creator, the average person, we are interested in checking the Linux file permissions.

/root# create the. SSH directory mkdir . SSH #设置权限 chmod  . SSH #检查 ls -al

Start creating SSH Keys

#创建, Rear 3 return Ssh-keygen -t RSA

Copy Id_rsa.pub to Authorized_keys

CD. SSH
Cat id_rsa.pub >> Authorized_keys

Copy ssh to h31-h34, login, found that you can not enter the password, even if the SSH settings successfully

SSH [email protected] #copy SCP /root/. ssh/authorized_keys [email protected]:/root/. ssh/#loginssh [email protected]

This period of content is more, divided into two parts.

Series Index

"Source" Self-Learning Hadoop series index from zero

This article is copyright Mephisto and Blog Park is shared, welcome reprint, but must retain this paragraph statement, and give the original link, thank you for your cooperation.

The article is written by elder brother (Mephisto), Sourcelink

"Source" self-learning Hadoop from zero: Linux preparation