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1. SSH Service Security SettingsChange the configuration file for the SSH service, which is "/etc/ssh/sshd_config".In this case, we will change the default SSH port 22 to 2244.Change /etc/ssh/sshd_config as follows2. Firewall (ufw)2.1 Install# pacman -S ufw# systemctl status ufw○ ufw.service - CLI Netfilter Manager Loaded: loaded (/usr/lib/systemd/system/ufw.service; disabled; preset: dis> Active: inactive (dead)You can confirm that the ufw service is stopped by displaying "Active: inactive (dead)"

1. User Account CreationAdd user (huong) to wheel group and create home directory# useradd -m -G wheel huongUser (huong) password setting# passwd huongNew password:Retype new password:passwd: password updated successfullyGrant sudo privileges to the added huong user2 . Configuration of the text editor vimVim was already installed during the Arch Linux installation, so this is just a configuration file.If you are installing vim3. Network Connections■ If using systemd-resolved, create /etc/resolv.conf as a link file# ln -sf /run/systemd/resolve/stub-resolv.conf /etc/resolv.conf■ If systemd-resolved is not used

For installation with ext4 file system, please refer to the following pagehttps://korodes.com/arch_en_02/https://korodes.com/arch_en_03/1.Creating partitions1.1 Confirmation of installation deviceCheck the target device with the lsblk command

1. Partitioning the disk on which Arch Linux is installedThis time, use gdisk command in UEFI mode and GPT for the partition table.Check current disk information# lsblkNAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTSloop0 7:0 0 693.5M 1 loop /run/archiso/airootfssda 8:0 0 20G 0 disksr0 11:0 1 813.3M 0 rom /run/archiso/bootmntIn the above case, a 20 GB virtual HDD was created on VmwareWorkstion, so the SIZE of the sda is set to 20 GB.The sda in the NAME line is the name of the device that represents the entire disk and will be partitioned to this sda.This time, create an EFI partition and a partition for Arch Linux, but not a swap partition.In the past, a partition was created for swap and allocated as swap, but now a "swap file" can be used without a swap partition.A "swap file" is a method of creating a single file of any size for swap and using that area as swap, which can be created, deleted, and resized.