centos7 初体验

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