Click here for "Safe Air Conditioner Repair and Proper Freon Recovery".(Japanese Version)

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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 Building a server

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
Ubuntu 18.04 Building a server

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