- 네임서버 추가
vi /etc/resolv.conf
nameserver 168.126.63.1
- 시스템 업데이트
# yum -y update
- 서버시간 맞춤
# yum -y install rdate
# crontab -e
00 01 * * * /usr/bin/rdate -s time.bora.net&&hwclock -w
타임존 다를때
ln -s /usr/share/zoneinfo/Asia/Seoul /etc/localtime
cp -p /usr/share/zoneinfo/Asia/Seoul /etc/localtime
- 일반계정 생성
# useradd 일반계정
# passwd 일반계정
- ssh root로그인 막기
vi /etc/ssh/sshd_config
PermitRootLogin no
PasswordAuthentication yes
# service sshd restart
or
# systemctl restart sshd
- centos 버전 확인
# grep . /etc/*-release
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