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」

nuy

Rocky Linux 8.4_en

Rocky Linux8.4 ; Database installation

1.Mysql8 Installation1-1.Install[root@Lepard ~]# dnf module -y install mysql:8.0[root@Lepard ~]# vi /etc/my.cnf.d/charset.cnf (Create New)# Set the default character encoding# To handle 4-byte characters such as pictograms, use [utf8mb4][mysqld]character-set-server = utf8mb4[client]default-character-set = utf8mb4[root@Lepard ~]# systemctl enable --now mysql1-2.Security measures
Rocky Linux 8.4_en

Rocky Linux8.4 ; Tripwire, Chkrootkit and Snort installed

1.Tripwire Installation1.1 Download and install[root@Lepard ~]# cd /usr/local/srcsrc]# wget https://rpmfind.net/linux/epel/8/Everything/x86_64/Packages/t/tripwire-2.4.3.7-5.el8.x86_64.rpmsrc]# rpm -Uvh tripwire-2.4.3.7-5.el8.x86_64.rpmIf you get a dependency error, enter the following
Rocky Linux 8.4_en

Rocky Linux8.4 ; OS Installation

Rocky LinuxCentOS, which was positioned as a downstream of RHEL (Red Hat Enterprise Linux), will no longer be supported for CentOS 8 on December 31, 2021.There are three distributions (AlmaLinux, RockyLinux, and CentOS Stream 8) that are attracting attention as a destination for migrating from CentOS, but this time we will build a server using the latest version of RockyLinux 8.4 for the following reasons.CentOS Stream 8Stability concerns with RHEL upstreamSupport period until May 31, 2024AlmaLinuxAlmaLinux is a free RHEL clone that is being developed by CloudLinux, the developer of CloudLinux OS, a commercial Linux distribution, with the goal of binary compatibility with the current version of RHEL.Support period until 2029Rocky LinuxIt is a free RHEL clone by the project started by Gregory Kurtzer, the founder of CentOS, and is being developed by the community as a "production downstream version of RHEL".The company is also eager to acquire sponsors, including Amazon Web Services (AWS) and Google Cloud.Support period until 2029
Ubuntu18.04_en

Ubuntu Server 18.04 ; SSL/TLS applied to web , mail , FTP server

1. Apache2 : SSL/TLS ConfigurationDescribes how to apply an SSL certificate obtained with Let's Encrypt to apache.Domain name : hoge.com1.1 Configuration of Apache2①Editing the Apache2 configuration fileRename and copy the default conf file (e.g. "hoge.com-ssl.conf")
Ubuntu18.04_en

Ubuntu Server 18.04 ; Mail Server Install

1.Postfix : Installation / ConfigurationPostfix is a software developed as an MTA (Mail Transport Agent) to replace Sendmail, and is a mail server with features such as high compatibility with Sendmail, security, easy maintenance, and speed.Also, since Postfix only functions as an SMTP server for sending mails, you will need to install a POP server for receiving mails separately as described later.
Ubuntu18.04_en

Ubuntu Server 18.04 ; Web server and antivirus installed.

1. WEB server installation1. 1 Apache2 installation① Install# apt -y install apache2② Edit configuration file# vi /etc/apache2/conf-enabled/security.conf# Line 25: ChangeServerTokens  Prod
Ubuntu18.04_en

Ubuntu Server 18.04 ; FTP Serve , NTP Server

1.Install the FTP server vsftpd① Install# apt install vsftpd② Allow PORT21 to be used by FTP in UFW(firewall)# ufw allow ftp# ufw reload③ Edit the configuration file (vsftpd.conf)
Ubuntu18.04_en

Ubuntu Server 18.04 Initial Setup

1. Set the root password and use the SU command$  passwd rootpassword for ← Current user's passwordEnter new UNIX password: ← Enter the root password to be set.Retype new UNIX password: ← Re-enter the same passwordpasswd: password updated successfully
LinuxTips(RedHat)_en

Display various information about the CPU

●Display the CPU information installed on the PC.To display the CPU information installed in the PC, refer to the "/proc/cpuinfo" file.This information is used to know the CPU load for top command, etc.
LinuxTips(RedHat)_en

Configuring the default gateway (router)

●Confirmation of the current default gatewayExecute the "route -n" command. "-n" is an option to display the hostname as IP.●Remove the default gatewaySet "del" as the argument of the route command, and set the IP address of the default gateway device (192.168.11.1) that you want to delete after "default gw".●Setting up a new default gatewaySet "add" as the argument of the route command, and set the IP address (192.168.11.2) of the default gateway device you want to set after "default gw".
Rocky Linux 8.4_en

Rocky Linux 8.4 ; antivirus, etc.

1.Synchronize the server time with Japan Standard Time.Edit chrony.conf# vi /etc/chrony.confPer line 3.pool 2.centos.pool.ntp.org iburst↓server ntp.nict.jpserver ntp1.jst.mfeed.ad.jpserver ntp2.jst.mfeed.ad.jpRestart chrony2.virus protection2.1 Clam AntiVirus installation and definition/configuration file settings①Installing Clam AntiVirus# dnf --enablerepo=epel -y install clamav clamav-update clamav-scanner-systemd
Ubuntu18.04_en

Ubuntu Server 18.04 ; Obtain an SSL certificate (Let's Encrypt).

Obtaining a certificate with Let's Encrypt①Enable mod_ssl# a2enmod ssl②Install Git.# apt-get install -y git③Install the certificate acquisition tool# cd /usr/local/# git clone https://github.com/certbot/certbot