Click here for "Error Codes for Commercial Air Conditioners".

2022-06

Almalinux8.6 Building a server

AlmaLinux 8.6 : OS Install

AlmaLinux 8.6  Install AlmaLinux OS is a project launched by CloudLinux in the US as an alternative to CentOS. Currently, the AlmaLinux OS Foundation is the development parent organization. AlmaLinux OS 8.6 is a Linux distribution compatible with "Red Hat Enterprise Linux 8"
2022.06.18
Almalinux8.6 Building a server
Rocky Linux8.6 Building a server

Rocky Linux8.6 :　OS Install

Rocky Linux 8.6 Install １．Download Rocky Linux 8 installation image can be downloaded from the following site https://rockylinux.org/download
2022.06.07
Rocky Linux8.6 Building a server
Almalinux8.6 Building a server

AlmaLinux 8.6 : WEB Server Install

1. Apache2 installation and virtual host configuration 1.1 Apache2 Install ①httpd install # dnf -y install httpd # httpd -v Server version: Apache/2.4.37 (AlmaLinux) 1.3 Virtual Host Settings Assign and configure the FQDN [alma.korodes.com] to be operated by the virtual host in the document root [/var/www/html/alam.korodes.com] directory
2022.06.21
Almalinux8.6 Building a server
Rocky Linux8.6 Building a server

Rocky Linux8.6 : WEB Server

1. Install Apache2  & Virtual Host 1.1 Install Apache2 ①Install httpd # dnf -y install httpd Version Check # httpd -v Server version: Apache/2.4.37 (rocky) Server built: May 10 2022 18:05:14 2. Use of CGI Scripts ①Confirmation of CGI availability # grep -n "^ *ScriptAlias" /etc/httpd/conf/httpd.conf 3. PHP installation and configuration 1.Install PHP ①install 4. Digest authentication with Apache2 Since Basic Authentication, a well-known authentication authorization method for http, sends authentication information in plain text, there is a risk of ID and password leakage if the packet is intercepted. On the other hand, Digest Authentication encrypts and transmits authentication information, so there is almost no risk of information leakage.
2022.06.08
Rocky Linux8.6 Building a server
Rocky Linux8.6 Building a server

Rocky Linux8.6 : FTP Server

Install FTP Server 1. Instaa  Vsftpd # dnf -y install vsftpd 2.Vsftpd configuration
2022.06.08
Rocky Linux8.6 Building a server
Almalinux8.6 Building a server

AlmaLinux 8.6 : FTP Server Install

FTP Server Installation 1. Vsftpd Install # dnf -y install vsftpd 2.Vsftpd configuration Save the unedited vsftpd.conf with .bak # cp /etc/vsftpd/vsftpd.conf /home/huong/vsftpd.conf.bak
2022.06.21
Almalinux8.6 Building a server
Almalinux8.6 Building a server

AlmaLinux 8.6 : Snort2 , Tripwire , Chkrootkit Install

SNORT2  Install 1. advance preparation ①Add the CodeReady Red Hat repository and install the required software # dnf config-manager --set-enabled powertools Tripwire  Install 1.Download and installation # cd /usr/local/src Chkrootkit  Install ①chkrootkit Download and Install # cd /usr/local/src
2022.06.21
Almalinux8.6 Building a server
Almalinux8.6 Building a server

AlmaLinux 8.6 :　Logwatch , Disk Usage Check Script

1. Logwatch Install ① Install # dnf install logwatch ② Edit configuration file 2. Introduce disk usage check script 2.1 Script Creation # cd /var/www/system # vi disk_capacity_check.sh
2022.06.24
Almalinux8.6 Building a server
Almalinux8.6 Building a server

AlmaLinux 8.6 :　SSL Certificate Acquisition , WEB・Mail SSL

1. Obtain an SSL certificate ( Let's Encrypt ) Install the latest open ssl # dnf install openssl-devel 1.1 Certificate Installation # dnf -y install certbot 2. Converting Apache to https Install the following # dnf -y install mod_ssl 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.
2022.06.24
Almalinux8.6 Building a server
Almalinux8.6 Building a server

AlmaLinux 8.6 : Public key SSH connection

SSH connection with authentication using RSA public key cryptography Creation of public and private key pairs Create a public/private key pair for a user connecting to a Linux server using OpenSSH. Use ssh-keygen to create the key pair. This time, we will create a key set using the RSA cipher used in the SSH protocol Version 2. The creation of a public/private key pair is performed with remote login user privileges (huong). If you do not specify the destination and file name, id_rsa and id_rsa.pub will be created in /home/huong/.ssh/. On the way, enter the password for the key.
2022.06.20
Almalinux8.6 Building a server
Debian11.3 Building a server

Debian11.3 : System Backup and Restore

1.1 Backup under /var/www/html ①　Create backup_all.sh script under /opt # vi /opt/backup_all.sh backup_all.sh script contents 1.2 Mysql database backup ①Create db_backup.sh script under /opt # vi /opt/db_backup.sh db_backup.sh script contents 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
2022.06.01
Debian11.3 Building a server
Debian11.3 Building a server

Debian11.3 : Disk Usage Check、Logwatch

1. Introduce disk usage check script 1.1 Scripting # cd /opt/script/ # vi disk_capacity_check.sh Contents of disk_capacity_check.sh #!/bin/bash #Email Address for Notification MAIL=" " 2. Log analysis tool logwatch installed 2.1 Install logwatch # apt -y install logwatch 2.2 Edit logwatch configuration file ①Copy the default configuration file
2022.06.01
Debian11.3 Building a server
Debian11.3 Building a server

System Integration Monitoring Debian11 : Zabbix6 Install

Open source integrated monitoring software "Zabbix Zabbix is an open source integrated monitoring software for centralized monitoring of servers, networks and applications. It provides monitoring, fault detection and notification functions required for integrated monitoring. With Zabbix agent and SNMP support for many platforms, you can monitor your entire system with a single Zabbix. To run Zabbix, you will need the PHP programming language, MySQL as a database server, and a web server such as Apache or Nginx. In this article, we will assume that all of these have already been configured.
2022.06.05
Debian11.3 Building a server
Rocky Linux8.6 Building a server

Rocky Linux8.6 : Let's Encrypt , Apache Mail SSL

1.Obtain SSL Certificate ( Let's Encrypt ) Install the latest open ssl # dnf install openssl-devel 1.1 Certificate Installation 2. Apache SSL Install the following just in case # dnf -y install mod_ssl 2.1 Edit ssl.conf file 3. Mail SSL/TLS(Let's Encrypt) 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.
2022.06.10
Rocky Linux8.6 Building a server
Rocky Linux8.6 Building a server

Rocky Linux8.6 :　Initial Settings

1. Disable SELinux First, disable selinux. selinux is a feature that improves auditing and security in Linux, but when enabled, it places considerable restrictions on the behavior of services and on what can be configured. Therefore, it is basically disabled in many cases.
2022.06.07
Rocky Linux8.6 Building a server
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