centos7 https://linux.cn/tag-RHCSA|RHCSA.html
#/etc/sysconfig/network
NETWORKING=yes
GATEWAY=192.168.48.1
#/etc/sysconfig/network-scripts/ifcfg-em1
DEVICE=em1
NM_CONTROLLED=no
ONBOOT=yes
BOOTPROTO=static
IPADDR=192.168.48.116
NETMASK=255.255.255.0
systemctl list-units |grep running
systemctl list-unit-files
systemctl stop NetworkManager.service
systemctl disable NetworkManager.service
systemctl restart network.service
systemctl enable network.service
systemctl stop postfix.service
systemctl disable postfix.service
systemctl stop firewalld.service
systemctl disable firewalld.service
yum install iptables-services
systemctl start iptables.service
systemctl enable iptables.service
#/etc/selinux/config
SELINUX=enforcing -> SELINUX=disabled
setenforce 0
# sestatus
SELinux status: enabled
SELinuxfs mount: /sys/fs/selinux
SELinux root directory: /etc/selinux
Loaded policy name: targeted
Current mode: #enforcing -> permissive
Mode from config file: disabled
Policy MLS status: enabled
Policy deny_unknown status: allowed
Max kernel policy version: 28
#/etc/yum.repos.d/centos.repo
[base]
name=CentOS-$releasever - Base
baseurl=http://mirrors.sohu.com/centos/$releasever/os/$basearch/
gpgcheck=0
enabled=1
[updates]
name=CentOS-$releasever - Updates
baseurl=http://mirrors.sohu.com/centos/$releasever/updates/$basearch/
gpgcheck=0
enabled=1
[extras]
name=CentOS-$releasever - Extras
baseurl=http://mirrors.sohu.com/centos/$releasever/extras/$basearch/
gpgcheck=0
enabled=1
[centosplus]
name=CentOS-$releasever - Plus
baseurl=http://mirrors.sohu.com/centos/$releasever/centosplus/$basearch/
gpgcheck=0
enabled=0
#/etc/yum.repos.d/epel.repo
[epel]
name=Extra Packages for Enterprise Linux $releasever - $basearch
baseurl=http://download.fedoraproject.org/pub/epel/$releasever/$basearch
gpgcheck=0
enabled=1
[epel-debuginfo]
name=Extra Packages for Enterprise Linux $releasever - $basearch - Debug
baseurl=http://download.fedoraproject.org/pub/epel/$releasever/$basearch/debug
gpgcheck=0
enabled=0
[epel-source]
name=Extra Packages for Enterprise Linux $releasever - $basearch - Source
baseurl=http://download.fedoraproject.org/pub/epel/$releasever/SRPMS
gpgcheck=0
enabled=0
localectl list-locales |grep ^en
# /etc/locale.conf
LANG="en_US.UTF-8"
localectl set-locale LANG=en_US.UTF-8
localectl status
tzselect
/etc/profile
TZ='Asia/Shanghai'; export TZ
hostnamectl set-hostname 'bjyh-48-116'
hostnamectl status
