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	<title>Debian11.5_en | Linux Server Construction</title>
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	<lastBuildDate>Thu, 20 Nov 2025 23:38:34 +0000</lastBuildDate>
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	<title>Debian11.5_en | Linux Server Construction</title>
	<link>https://korodes.com</link>
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	<item>
		<title>Debian11.5 : OS Install</title>
		<link>https://korodes.com/en/debian11-5_en_01/</link>
		
		<dc:creator><![CDATA[nuy]]></dc:creator>
		<pubDate>Wed, 05 Oct 2022 07:41:34 +0000</pubDate>
				<category><![CDATA[Debian11.5_en]]></category>
		<guid isPermaLink="false">https://korodes.com/?p=10165</guid>

					<description><![CDATA[1.Debian11 Overview

In this article, we will explain how to build a server with Debian, the basis of the user-friendly Linux distribution UBUNTU.

The latest release is Debian 11.5 (codenamed "bullseye").
Released on August 14, 2021 with an update (point release11.5) on September 10, 2022.

2.Download Debian installation image

Debian11 download site https://www.debian.org/

Access the above official website and download "debian-11.5.0-amd64-netinst.iso." which is convenient for setup in an environment connected to the Internet.（Fits on a single CD）
NETINST allows you to download and install the necessary packages from the Internet, so you can use a smaller installer (approximately 391 MB for v11.5.0) than a full installer.
Click through the following screens in order.]]></description>
		
		
		
			</item>
		<item>
		<title>Debian11.5 : SNORT2  ,  Tripwire Install</title>
		<link>https://korodes.com/en/debian11-5_en_10/</link>
		
		<dc:creator><![CDATA[nuy]]></dc:creator>
		<pubDate>Fri, 07 Oct 2022 00:04:26 +0000</pubDate>
				<category><![CDATA[Debian11.5_en]]></category>
		<guid isPermaLink="false">https://korodes.com/?p=10288</guid>

					<description><![CDATA[1.Install SNORT2

Snort is an open source network intrusion detection system capable of performing real-time traffic analysis and packet logging on IP networks.

It can perform "protocol analysis," "content search," and "matching," and can be used to detect a variety of attacks, including "buffer overflows," "stealth port scans," "CGI attacks," "SMB probes," "OS fingerprinting attempts," "semantic URL attacks," and "server message block probes.
2.Install Tripwire

Implement a system to detect file tampering on Linux servers by crackers.
This time, Tripwire, a host-based IDS (IDS=Intrusion Detection System), will be installed as the file tampering detection system.
Tripwire creates a database of file status at the time of installation, and detects file additions/changes/deletions by comparing the database with the current status of the file.]]></description>
		
		
		
			</item>
		<item>
		<title>Debian11.5 : NTP ,FTP  Server Installation</title>
		<link>https://korodes.com/en/debian11-5_en_05/</link>
		
		<dc:creator><![CDATA[nuy]]></dc:creator>
		<pubDate>Wed, 05 Oct 2022 11:04:33 +0000</pubDate>
				<category><![CDATA[Debian11.5_en]]></category>
		<guid isPermaLink="false">https://korodes.com/?p=10229</guid>

					<description><![CDATA[1. Install NTP server
# apt -y install chrony
# vi /etc/chrony/chrony.conf
# Line 8.：Comment the default settings and add the NTP server for your time zone.
#pool 2.debian.pool.ntp.org iburst
pool ntp.nict.jp iburst
# Add to the last line (Range for which time synchronization is allowed)
allow 192.168.11.0/24
2. Install FTP Server
2.1 Install Vsftpd
# apt install vsftpd
FTP Port21 allowed
# ufw allow ftp
# ufw reload]]></description>
		
		
		
			</item>
		<item>
		<title>Debian11.5  : Initialization</title>
		<link>https://korodes.com/en/debian11-5_en_02/</link>
		
		<dc:creator><![CDATA[nuy]]></dc:creator>
		<pubDate>Wed, 05 Oct 2022 07:54:31 +0000</pubDate>
				<category><![CDATA[Debian11.5_en]]></category>
		<guid isPermaLink="false">https://korodes.com/?p=10199</guid>

					<description><![CDATA[1. Installing and configuring the vim editor

Debian has "nano" as the default editor. nano is somewhat difficult to use, and there are few environments where it is used, so we will introduce the procedure for changing the editor to "vim".。

1.1 Check vim package

Debian has vim installed by default, but it is a package called "vim-tiny", which is a less functional version. Let's check the installed vim package.
Debian uses the "dpkg" command to check packages. The "-l" option displays a list of packages.


Since the "dpkg" command as is will show all packages installed on the system, we will use the "grep" command to extract only those packages that contain the string "vim". Execute as follows]]></description>
		
		
		
			</item>
		<item>
		<title>Debian11.5 : Anti-virus(Clamav)　、Mail Server</title>
		<link>https://korodes.com/en/debian11-5_en_07/</link>
		
		<dc:creator><![CDATA[nuy]]></dc:creator>
		<pubDate>Thu, 06 Oct 2022 01:27:47 +0000</pubDate>
				<category><![CDATA[Debian11.5_en]]></category>
		<guid isPermaLink="false">https://korodes.com/?p=10244</guid>

					<description><![CDATA[1. Antivirus software Clamav installed

Install Clam AntiVirus, a free anti-virus software for Linux, as an anti-virus measure.
By installing this anti-virus software, you can not only scan the entire server for viruses, but also scan incoming and outgoing mail for viruses if you build and configure a mail server.

1.1 Install
# apt install clamav clamav-daemon
2. Mail server installation

Postfix was developed as a Mail Transport Agent (MTA) to replace sendmail, and is a mail server that is highly compatible with sendmail, secure, easy to maintain, and fast.
In addition, since Postfix only functions as an SMTP server for sending mail, the POP server Dovecot for receiving mail will be installed separately in the latter half.

2.1 Postfix : Installation Configuration
3 Applied ClamAV to mail server Postfix

Set up Postfix and Clamav to work together to scan incoming and outgoing mail in real time.

①Install Amavisd and Clamav Daemon and start Clamav Daemon]]></description>
		
		
		
			</item>
		<item>
		<title>Debian11.5 : System Backup and Restore</title>
		<link>https://korodes.com/en/debian11-5_en_12/</link>
		
		<dc:creator><![CDATA[nuy]]></dc:creator>
		<pubDate>Fri, 07 Oct 2022 04:00:01 +0000</pubDate>
				<category><![CDATA[Debian11.5_en]]></category>
		<guid isPermaLink="false">https://korodes.com/?p=10320</guid>

					<description><![CDATA[1. System Backup
1.1 Backup under /var/www/html

①　Create backup_all.sh script under /opt
1.2 Mysql database backup

①Create db_backup.sh script under /opt

# vi /opt/db_backup.sh

db_backup.sh script contents
2. System Restore
2.1 Restore backup files under HTML

① Store HTML backup files used for backup in the "/ (root)" directory
Select the backup file with the latest timestamp (e.g. www_back_20220501.tar.gz)
2.2 Restore MySQL database

①Save DB backup file to any directory and extract data

# cd /var/www/backup/db_bak]]></description>
		
		
		
			</item>
		<item>
		<title>Debian11.5 : logwatch , Disk Usage Check Script</title>
		<link>https://korodes.com/en/debian11-5_en_11/</link>
		
		<dc:creator><![CDATA[nuy]]></dc:creator>
		<pubDate>Fri, 07 Oct 2022 01:45:48 +0000</pubDate>
				<category><![CDATA[Debian11.5_en]]></category>
		<guid isPermaLink="false">https://korodes.com/?p=10313</guid>

					<description><![CDATA[1. Introduce disk usage check script
1.1 Scripting
# cd /opt/script/
# vi disk_capacity_check.sh
Contents of disk_capacity_check.sh
Configured to notify when disk usage exceeds 80%.
2. Log analysis tool logwatch installed
2.1 logwatch Install
# apt -y install logwatch
2.2 Edit logwatch configuration file]]></description>
		
		
		
			</item>
		<item>
		<title>Debian11.5 : MySQL8 , WordPress Install</title>
		<link>https://korodes.com/en/debian11-5_en_09/</link>
		
		<dc:creator><![CDATA[nuy]]></dc:creator>
		<pubDate>Thu, 06 Oct 2022 23:31:03 +0000</pubDate>
				<category><![CDATA[Debian11.5_en]]></category>
		<guid isPermaLink="false">https://korodes.com/?p=10257</guid>

					<description><![CDATA[1. Install MySQL 8
1. 1 Install

The MySQL team provides the official MySQL PPA for Debian Linux. After downloading and installing the package on your Debian system, the PPA file will be added to your system. To enable the PPA, run the following command
1.2. MySQL Server Security Settings

Run the tool mysql_secure_installation to configure security-related settings for the MySQL server.
Once executed, several security settings are initiated in the form of questions. First, you will be asked if you want to use a plugin for password validation as follows
2.Install WordPress
2.1 Database Creation

Create a database for Word Press (for example, in this case, the database name is "wp_db", the user name is "wp_user", and the password is "?Y123456y")
2.2 Wordpress Download and Installation

①Download and Deployment]]></description>
		
		
		
			</item>
		<item>
		<title>Debian11.5 : Let&#039;s Encrypt   WEB , Mail Server  SSL</title>
		<link>https://korodes.com/en/debian11-5_en_08/</link>
		
		<dc:creator><![CDATA[nuy]]></dc:creator>
		<pubDate>Thu, 06 Oct 2022 10:01:07 +0000</pubDate>
				<category><![CDATA[Debian11.5_en]]></category>
		<guid isPermaLink="false">https://korodes.com/?p=10250</guid>

					<description><![CDATA[1. Obtain a certificate (Let's Encrypt)
1.1 advance preparation

①Enable mod_ssl

# a2enmod ssl
2. SSL/TLS (Let's Encrypt) configuration for Apache2

①Edit Apache2 SSL-related configuration files
3. SSL/TLS (Let's Encrypt) settings on the mail server
3.1 Obtaining a certificate for the mail server

Obtain a certificate for the mail server, but it cannot be obtained in the same way as above, so the following with the "--standalone" option fails.]]></description>
		
		
		
			</item>
		<item>
		<title>Debian11.5 : WEB Server(Apache) Install</title>
		<link>https://korodes.com/en/debian11-5_en_06/</link>
		
		<dc:creator><![CDATA[nuy]]></dc:creator>
		<pubDate>Wed, 05 Oct 2022 12:16:38 +0000</pubDate>
				<category><![CDATA[Debian11.5_en]]></category>
		<guid isPermaLink="false">https://korodes.com/?p=10235</guid>

					<description><![CDATA[Web server Apache2 installation

Allow http:80 and https:443 ports in UFW before installation

# ufw allow http
# ufw allow https
# ufw reload
1 Apache2 Installation and Configuration

Apache2 Install
3. Apache2; Using Perl Scripts

Enable CGI to make Perl scripts available
4 Apache2 : Using PHP Scripts

①Install PHP

# apt -y install php php-cgi libapache2-mod-php php-common php-pear php-mbstring
5. Virtual Host Settings

Copy the default configuration file (file name is arbitrary, in this case vhost-yourdomain.conf as an example) and configure the virtual host]]></description>
		
		
		
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