centos重,centos7停止维护的后果
各位老铁们好,相信很多人对centos重都不是特别的了解,因此呢,今天就来为大家分享下关于centos重以及centos7停止维护的后果的问题知识,还望可以帮助大家,解决大家的一些困惑,下面一起来看看吧!
centos7重启网卡的命令
1、动态获取ip(前提是你的路由器已经开启了DHCP)
修改网卡配置文件 vi
/etc/sysconfig/network-scripts/ifcfg-ens32(最后一个为网卡名称)
动态获取IP地址需要修改两处地方即可
(1)bootproto=dhcp
(2)onboot=yes
网卡配置文件fcfg-ens32里面的配置信息
修改后重启一下网络服务即可 systemctl restart network
重启网络服务命令
这样动态配置IP地址就设置好了,这个时候再查看一下ip addr就可以看到已经获取了IP地址,且可以上网
查看自动获取的IP地址
2、配置静态IP地址
设置静态IP地址与动态iIP差不多,也是要修改网卡配置文件 vi
/etc/sysconfig/network-scripts/ifcfg-ens32(最后一个为网卡名称)
(1)bootproto=static
(2)onboot=yes
(3)在最后加上几行,IP地址、子网掩码、网关、dns服务器
(4)重启网络服务
这样动态配置IP地址就设置好了,这个时候再查看一下ip addr就可以看到已经获取了IP地址,且可以上网
查看配置的IP地址
3、部分配置命令
1、网卡重启方法
centos6的网卡重启方法:service network restart
centos7的网卡重启方法:systemctl restart network
2、DNS配置文件:cat/etc/resolv.conf
设置主机和IP绑定信息:cat/etc/hosts
设置主机名:cat/etc/hostname
3、关闭防火墙并设置开机不启动
查看防火墙状态:systemctl status firewalld.service
关闭:systemctl stop firewalld
开启:systemctl start firewalld
开机自动关闭:systemctl disable firewalld
开机自动启动:systemctl enable firewalld
centos7重启网卡命令
重启网卡命令(两种):/etc/init.d/networkrestart(这个更好,可以tab补全)servernetworkrestartifupeth0查看:ifconfigeth0验证:pingwww。LINUXPROBE。
查看网络地址:centos7取消了ifconfig命令,使用ipaddr命令查看IP地址配置网络用VirtualBox安装的CentOS7,安装完成后,发现无法上网,于是到网上查了一下,经过以下几步即可上网。
我们采用修改文件法。这是网卡的配置文件:Centos7网络自动启动,我们首先用vi打开该文件,Centos7网络自动启动,编辑上面的文件,将onboot选项设置为yes.保存退出。重启电脑后,发现Centos7网络自动启动了。
运行命令grub2-mkconfig-o/boot/grub2/grub.cfg来重新生成GRUB配置并更新内核参数。
CentOS7网络设置修复
服务器有两个网卡enp7s0和enp8s0
服务器需要通过enp8s0和互联网联通,互联网为笔记本转接
通过centos7界面修改ip,失败;
通过centos7的网络配置文件/etc/sysconfig/network-scripts/ifcfg-enp8s0修改ip设置
设置如下:
1.启动 service network start报错,通过journalctl-xe查看如下
-- Defined-By: systemd
-- Support:
--
-- Unit fprintd.service has begun starting up.
12月 29 19:31:12 crrchost dbus-daemon[851]: dbus[851]: [system] Successfully activated service'net.reactivated.Fprint'
12月 29 19:31:12 crrchost dbus[851]: [system] Successfully activated service'net.reactivated.Fprint'
12月 29 19:31:12 crrchost systemd[1]: Started Fingerprint Authentication Daemon.
-- Subject: Unit fprintd.service has finished start-up
-- Defined-By: systemd
-- Support:
--
-- Unit fprintd.service has finished starting up.
--
-- The start-up result is done.
12月 29 19:31:12 crrchost fprintd[6685]: Launching FprintObject
12月 29 19:31:12 crrchost fprintd[6685]:** Message: D-Bus service launched with name: net.reactivated.Fprint
12月 29 19:31:12 crrchost fprintd[6685]:** Message: entering main loop
12月 29 19:31:18 crrchost polkitd[835]: Operator of unix-session:1 successfully authenticated as unix-user:windfarm to gain TEMPORARY authorization for action org.freedesktop.systemd1.manage-units for system-bus
12月 29 19:31:18 crrchost systemd[1]: Starting LSB: Bring up/down networking...
-- Subject: Unit network.service has begun start-up
-- Defined-By: systemd
-- Support:
--
-- Unit network.service has begun starting up.
12月 29 19:31:18 crrchost network[6693]:正在打开环回接口: [ 确定 ]
12月 29 19:31:18 crrchost network[6693]:正在打开接口 enp7s0:
12月 29 19:31:24 crrchost network[6693]:正在确定 enp7s0的 IP信息...失败:不存在链接。检查电缆?
12月 29 19:31:24 crrchost network[6693]: [失败]
12月 29 19:31:24 crrchost network[6693]:正在打开接口 enp8s0: RTNETLINK answers: File exists
12月 29 19:31:25 crrchost network[6693]: [ 确定 ]
12月 29 19:31:25 crrchost network[6693]: RTNETLINK answers: File exists
12月 29 19:31:25 crrchost network[6693]: RTNETLINK answers: File exists
12月 29 19:31:25 crrchost network[6693]: RTNETLINK answers: File exists
12月 29 19:31:25 crrchost network[6693]: RTNETLINK answers: File exists
12月 29 19:31:25 crrchost network[6693]: RTNETLINK answers: File exists
12月 29 19:31:25 crrchost network[6693]: RTNETLINK answers: File exists
12月 29 19:31:25 crrchost network[6693]: RTNETLINK answers: File exists
12月 29 19:31:25 crrchost network[6693]: RTNETLINK answers: File exists
12月 29 19:31:25 crrchost network[6693]: RTNETLINK answers: File exists
12月 29 19:31:25 crrchost systemd[1]: network.service: control process exited, code=exited status=1
12月 29 19:31:25 crrchost systemd[1]: Failed to start LSB: Bring up/down networking.
-- Subject: Unit network.service has failed
-- Defined-By: systemd
-- Support:
--
-- Unit network.service has failed.
--
-- The result is failed.
12月 29 19:31:25 crrchost systemd[1]: Unit network.service entered failed state.
12月 29 19:31:25 crrchost systemd[1]: network.service failed.
12月 29 19:31:25 crrchost polkitd[835]: Unregistered Authentication Agent for unix-process:6669:319312(system bus name:1.263, object path/org/freedesktop/PolicyKit1/AuthenticationAgent, locale zh_CN.UTF-8)(d
3.systemctl status network.service查看如下:
● network.service- LSB: Bring up/down networking
Loaded: loaded(/etc/rc.d/init.d/network; bad; vendor preset: disabled)
Active: failed(Result: exit-code) since六 2018-12-29 18:38:17 CST; 1min 24s ago
Docs: man:systemd-sysv-generator(8)
Process: 909 ExecStart=/etc/rc.d/init.d/network start(code=exited, status=1/FAILURE)
12月 29 18:38:06 crrchost systemd[1]: Starting LSB: Bring up/down networking...
12月 29 18:38:06 crrchost network[909]:正在打开环回接口: [ 确定 ]
12月 29 18:38:06 crrchost network[909]:正在打开接口 enp7s0:
12月 29 18:38:12 crrchost network[909]:正在确定 enp7s0的 IP信息...失败:…?
12月 29 18:38:12 crrchost network[909]: [失败]
12月 29 18:38:17 crrchost network[909]:正在打开接口 enp8s0: [ 确定 ]
12月 29 18:38:17 crrchost systemd[1]: network.service: control process exi...=1
12月 29 18:38:17 crrchost systemd[1]: Failed to start LSB: Bring up/down n...g.
12月 29 18:38:17 crrchost systemd[1]: Unit network.service entered failed...e.
12月 29 18:38:17 crrchost systemd[1]: network.service failed.
Hint: Some lines were ellipsized, use-l to show in full.
1.参考网络方法停用NetworkManager,依旧报错
systemctl stop NetworkManager
systemctl disable NetworkManager
2.比对两个网卡的MAC地址和配置文件的MAC地址
a.查看mac地址配置,ipconfig
b.查看配置文件中的macd地址是否匹配,ifcfg-enp8s0和ifcfg-enp7s0,
按照网络方法增加一行HWADDR=ipconfig查询到的对应网卡MAC地址;
c.重启network服务依旧报错;
3.通过GUI界面查看网络,提示“系统的网络服务与此版本的网络管理器不兼容”
这与之前停掉NetworkManager有关,此处不表;
4.因为ifcfg-enp7s0实际上没有插网线,修正其配置文件如下:
ONBOOT=no
重新启动服务后网络正常;
5.检查网络
1.network和NetworkManager不同,通过界面和通过配置文件,可能会导致配置混乱,且NetworkManager有些程序不支持,需要停用;
2.BOOTPROTO=none虽然可以表示静态ip,但是如果要启用,必须设置其为
BOOTPROTO=static或BOOTPROTO=dhcp
3.一个网卡没哟被启用,也就是没有设置动态ip或静态ip,是无法被初始化的,不能设置ONBOOT=yes
In Centos7.0 disabling NetworkManager will leave a dhcp client running configured for NetworkManager. This causes the error message RTNETLINK answers: File exists when the network service is started.
The stale dhclient process has the additional"benefit" that when the lease expires your dhclientwill choke, since it cannot reach NetWorkManager, thus removing your IP address.
If you grep for it, you will see that it points to a NetWorkManager configuration file.
[root@host~]# ps-ef| grep dhc
root 1865 792 0 Apr28? 00:00:00/sbin/dhclient-d-sf\
/usr/libexec/nm-dhcp-helper-pf/var/run/dhclient-eno1.pid-lf\
/var/lib/NetworkManager/dhclient-c96e56d3-a4c9-4a87-85ca-93dc0ca268f2-eno1.lease\
-cf/var/lib/NetworkManager/dhclient-eno1.conf eno1
So what you can do is kill the dhclient and only then start your network service.