※修改主机名:
centos5/6
1、/etc/sysconfig/network
2、修改hosts文件:/etc/hosts
centos7
1、/etc/hostname,或者hostnamectl set-hostname newhostname
2、修改host文件
※将网卡改为默认开机自动启动:
※同步服务器时间
centos 5/6
1、在/etc/ntp.conf里面加:server 170.18.0.1 iburst
2、service ntpd status &>/dev/null || service ntpd start &>/dev/null
3、设置开机启动:chkconfig ntpd on
4、同步时间:ntpdate 172.18.0.1
centos 7
1./etc/chrony.conf里面加server 172.18.0.1 iburst
2.systemctl status chronyd &>/dev/null || systemctl start chronyd &>/dev/null
3.设置开机启动:systemctl enable chronyd &>/dev/null
4.同步时间:ntpdate 172.18.0.1
※查看文件或者目录大小:du -sh 目录名/文件名
※新加硬盘df不显示,需要激活:
echo ‘ - - - ‘ > /sys/class/scsi_host/host2/scan
echo ‘ - - - ‘ > /sys/class/scsi_host/host0/scan
echo ‘ - - - ‘ > /sys/class/scsi_host/host1/scan
※取passwd中用户名和bash一样的行:getent passwd|egrep "^([a-z]+):.*/\1$"
※echo centos| passwd --stdin luo>/dev/null
※Centos7配置网卡名为eth0
/etc/sysconfig/network-scripts/ifcfg-ens33(或则eth0)
ONBOOT改为yes
1、在/etc/default/grub里面GRUB_CMDLINE后面加net.ifnames=0
或/boot/grub2/grub.cfg中第一个linux 16开头行尾net.ifnames=0
如果是dell服务器(rpm -qi biosdevname)需另外加biosdevname=0
2、执行命令:grub2-mkconfig -o /boot/grub2/grub.cfg
如果是efi的需要执行grub2-mkconfig -o /boot/grub2/efi grub.cfg
3、重启生效
※Ubuntu配置网络
一、网卡名配置为eth0
1、在/etc/default/grub里面GRUB_CMDLINE后面加net.ifnames=0
2、执行命令:grub-mkconfig -o /boot/grub/grub.cfg
3、重启生效
二、配置动态ip
配置静态IP
※防火墙
iptables -vnL查看防火墙
iptables -F关闭防火墙
Centos 6
关闭防火墙:service iptables stop
关闭防火墙下次开机不启动:chkconfig iptables off
Centos 7
systemctl stop firewalld关闭防火墙
systemctl disable firewalld下次开机不启动防火墙
把某个IP加进防火墙:iptables -A INPUT -s 192.168.33.107 -j REJECT
※centos7设置光盘自动挂载:
yum install autofs
systemctl start autofs
systemctl enable autofs
※关闭SElinux的步骤:/etc/selinux/config中SELINUX=disabled
批量关闭主机列表中的selinux:
pssh -h /data/hostip.txt "sed -i.bak -r ‘s/^(SELINUX=).*/\1disabled/‘ /etc/selinux/config"
※关闭SSH反向解析:
###centos 6设置#####
sed -r -i.bak -e "[email protected]^#(UseDNS)@\[email protected]" -e "[email protected]^#(GSSAPIAuthentication)@\[email protected]" /etc/ssh/sshd_config
关闭ssh反向解析,79行GSSAPIAuthentication yes改为no,去掉#号,115行#UserDNS no前的#号去掉
重启服务 service sshd restart
centos7设置##########
sed -r -i.bak -e ‘[email protected]^(GSSAPIAuthentication )[email protected]\[email protected]‘ -e ‘[email protected]^#(UseDNS )[email protected]\[email protected]‘ /etc/ssh/sshd_config
重启服务 systemctl restart sshd
※系统开机默认启动模式:
centos6:cat /etc/inttab,改为3
centos7:systemctl set-default multi-user.target
原文地址:https://blog.51cto.com/14451011/2431149