Linux Learning Summary (9)

# # #ddns # #
1) Achieve master change, slave automatic change
Master
Vim/etc/named.conf

Vim/etc/named.rfc1912.zones
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cp-p named.localhost westos.com.zone
Vim Westos.com.zone
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vim/etc/named.conf
Vim/etc/named.rfc1912.zones
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cp-p named.localhost Linux.com.zone
Vim Linux.com.zone

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2) implement change Master in slave
No Password required:
Master
Vim/etc/named.rfc1912.zones

chmod 775/var/named

Slave
Vim/etc/named.rfc1912.conf

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With password:
Master
Cd/mnt
Dnssec-keygen-a hmac-md5-b 128-n HOST Westos

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Cp-p/etc/rndc.key/etc/haha.key
vim/etc/named.conf
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Slave:
cd/mnt
Nsupdate-k k ...
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3) DNS to Slave on master Information such as IP and password
  make slave host name and corresponding IP changes
Master:
Yum install dhcp-y
cp/usr/share/doc/dhcp-4.2.5/ Dhcpd.example.config/etc/dhcp/dhcpd.config
vim/etc/dhcp/dhcpd.conf

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Slave
Vim/etc/systemconfig/network-scripts/ifcfg-eth0
Systemctl Restart Network

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# #数据库mariadb # #
1. Database Installation
Yum Install mariadb Mariadb-server
Systemctl Start mariadb
Mysql_secure_installation

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2. Login
Mysql-uroot-predhat

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show DATABASES;
CREATE DATABASE LINUX;
Use LINUX;
SHOW TABLES;
CREATE TABLE Westos (XING varchar (8), MING varchar (8));
SELECT * from Westos;
INSERT into Westos VALUES (' L ', ' MX ');
ALTER TABLE westos ADD CLASS VARCHAR (8);
ALTER TABLE westos DROP CLASS;
DESC Westos;
UPDATE westos SET ming= ' Qinwen ';
DELETE feom westos whrer xing= ' LIU ';
DROP TABLE Westos;
DROP DATABASE LINUX;
CREATE USER [email protected] identified by ' Redhat ';
CREATE USER [email protected] '% ' identified by ' Redhat ';
GRANT insert,update on Mysql.user to [email protected];
SHOW GRANTS for [email protected];
REVOKE insert,update on Mysql.user from [email protected];
DROP USER [email protected];
DROP USER [email protected] '% ';

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*) How to forget the password
1.systemctl Stop MARIADB
2.mysqld_safe--skip-grant-tables
3.mysql-uroot
4.update Mysql.user Set Password=password (' Redhat ');
5.ps aux |grep MySQL, kill-9 with MySQL-related PID

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*) Database backup
Mysqldump-uroot-predhat Westos>/mnt/westos.sql
Mysql-uroot-p Redhat Westos</mnt/westos.sql

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1.yum Install httpd php php-mysql-y
2.systemctl Start httpd
Systemctl Start mariadb
Systemctl Stop Firewalld
Download PhpMyAdmin and unzip to/var/www/html, go to unzip directory
3.systemctl Restart httpd
CP config.sample.inc.php config.inc.php
Vim config.inc.php, $cfg [' Blowfish_secret ']= ' any character ';

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# # #邮件传输协议 # #
1. Experimental environment configuration
Change two host names to haha.westos.com,haha.linux.com
DNS is changed to Linux host address 172.25.254.127
On a Linux host:
Yum Install Bind-y
Systemctl Stop Firewalld
Systemctl Start named
Vim/etc/named.conf
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/etc/named.rfc1912.zones
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Vim/var/named/linux.com.zone

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Vim/var/named/westos.com.zone
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2.postfix Configuration
Modify the Postfix file on both hosts
Vim/etc/postfix/main.cf

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Systemctl Stop Firewalld
3. Mail sending and receiving
Westos Host:

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*) Queue postsuper-d Queueid Delete message when there is an error message
4. Mail aliases and Mass
Set up on a Linux host
Vim/etc/aliases

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Postalias/etc/aliases
Systemctl restart Postfix
e-mail test to admin and more on Westos host

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5. Change Sender Name
Linux hosts:
Vim/etc/postfix/generic

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Postmap generic
Postconf-e "smtp_generic_maps = hash:/etc/postfix/generic"
mail [email protected]

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# #telnet # #

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Linux Learning Summary (9)