業務用エアコン関連の技術情報、エラーコード、環境問題対策に関する別サイト「エアコンの安全な修理・適切なフロン回収」

2023

Debian10.13_en

Debian10.13 : MySQL8 , WordPress

1. MySQL 8 Install1. 1 Update package indexInstall necessary...
Debian10.13_en

Debian10.13 : Let's Encrypt WEB , Mail SSL

1. Obtaining a Certificate(Let's Encrypt)1.1 advance prepara...
Debian10.13_en

Debian10.13 : Antivirus , Mail Server

1.Anti-virus Clamav installed1.1 InstallThe clamav-related c...
Debian10.13_en

Debian10.13 : WEB Server Apache2

WEB Server Apache2Allow http:80 and https:443 ports in UFW b...
Debian10.13_en

Debian10.13 : NTP ,FTP Server

1. Install an NTP server that provides time synchronization ...
Debian10.13_en

Debian10.13 : SSH with public key

SSH connection with authentication using RSA public key cryp...
Debian10.13_en

Debian10.13 : SSH , Firewall

1. SSH Service Security SettingsThe SSH service allows the r...
Debian10.13_en

Debian10.13 : Initialization

1. Install and configure vim editorDebian has "nano" as the ...
Debian10.13_en

Debian10.13 ; OS Install

1.Download the .Debian10.13 installation imageDownload site ...
Debian12.1_en

Debian12.1 : Nagios Server , Tripwire Install

Open source integrated monitoring software "Nagios Server" installedNagios is an open source monitoring solution running on Linux.Nagios is designed to periodically check critical network, application, or server parameters.These parameters include microprocessor load, number of running processes, log files, disk and memory usage, as well as many other services such as SMTP (Simple Mail Transfer Protocol), HTTP (Hypertext Transfer Protocol), POP3 (Post Office Protocol 3), etc. can be checked.These parameters require a microprocessor load, a database such as PHP or MySQL to run Nagois, and a web server such as Apache or Nginx. We will proceed under the assumption that all of these have already been configured
Debian12.1_en

Debian12.1 : System Backup and Restore

1. System Backup1.1 Backup under /var/www/html① Create backup_all.sh script under /opt/script1.2 MariaDB database backup①Create db_backup.sh script under /opt/script# vi /opt/script/db_backup.shdb_backup.sh script contents2. System Restore2.1 Restore backup files under HTML① Store HTML backup files used for backup in the "/ (root)" directorySelect the backup file with the latest timestamp (e.g. www_back_20220501.tar.gz)2.2 Restore MariaDB database①Save DB backup file to any directory and extract data# cd /var/www/backup/db_bak
Debian12.1_en

Debian12.1 :  Suricata , Logwatch , Chkrootkit , Disk Usage Check Script

SuricataSURICATA IDS/IPS is an open source IDS that monitors communications on the network and detects suspicious traffic.The basic mechanism is signature-based, so it can detect predefined unauthorized communications. Suricata is also characterized by its ability to provide protection as well as detection. Logwatch,Chkrootkit,Disk Usage Check Script install
Debian12.1_en

Debian12.1 : MariaDB , WordPress Install

1. MariaDB1.1 Install1.4. MariaDB Server Security SettingsMariaDB comes with a default security script, mariadb-secure-installation, which can be used to improve the security of your MariaDB installation, includingSet a password for the root account (if necessary).Disable remote root login to the database.Delete anonymous user accounts.Delete the test database to which anonymous users have access by default.2.WordPress2.1 Database CreationCreate 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")
Debian12.1_en

Debian12.1 : Let's Encrypt WEB , Mail Server SSL

1. Obtain a certificate (Let's Encrypt)1.1 advance preparation①Enable mod_ssl# a2enmod ssl2. SSL/TLS (Let's Encrypt) configuration for Apache2①Edit Apache2 SSL-related configuration files3. SSL/TLS (Let's Encrypt) settings on the mail server3.1 Obtaining a certificate for the mail serverObtain 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.
Debian12.1_en

Debian12.1 : Anti-virus(Clamav) 、Mail Server

1.Antivirus software Clamav installedInstall 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.2. Mail server installationPostfix 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.3 Applied ClamAV to mail server PostfixSet up Postfix and Clamav to work together to scan incoming and outgoing mail in real time.4 Apply spam checks to the mail server4.1 Spam checking using spamassassin and procmail①spamassassin and procmail installation