centos forever？centos更新

大家好,今天小编来为大家解答以下的问题，关于centos forever，centos更新这个很多人还不知道，现在让我们一起来看看吧！

centOS7下重启网络服务报错

centos7无法启动网络(service network restart)错误由多种因素引起，应针对性解决：

1、和 NetworkManager服务有冲突，直接关闭 NetworkManger服务就好了，执行service NetworkManager stop，并且禁止开机启动 chkconfig NetworkManager off，之后重启就好了；

2、和配置文件的MAC地址不匹配，直接修改/etc/udev/rules.d/70-persistent-net.rules文件的MAC地址和/etc/sysconfig/network-scripts/ifcfg-eth0一样就好了。

3、执行 service network restart出现以下错误：

Restarting network(via systemctl): Job for network.service failed. See'systemctl status network.service'

and'journalctl-xn' for details.

:根据上面的提示，执行“systemctl status network.service”输出以下的类似信息：

[root@localhost~]# systemctl status network.service

network.service- LSB: Bring up/down networking

Loaded: loaded(/etc/rc.d/init.d/network)

Active: failed(Result: exit-code) since三 2014-11-05 15:30:10 CST; 1min 5s ago

11月 05 15:30:10 localhost.localdomain network[2920]: RTNETLINK answers: File exists

11月 05 15:30:10 localhost.localdomain network[2920]: RTNETLINK answers: File exists

11月 05 15:30:10 localhost.localdomain network[2920]: RTNETLINK answers: File exists

11月 05 15:30:10 localhost.localdomain network[2920]: RTNETLINK answers: File exists

11月 05 15:30:10 localhost.localdomain network[2920]: RTNETLINK answers: File exists

11月 05 15:30:10 localhost.localdomain network[2920]: RTNETLINK answers: File exists

11月 05 15:30:10 localhost.localdomain network[2920]: RTNETLINK answers: File exists

11月 05 15:30:10 localhost.localdomain systemd[1]: network.service: control process exited, code=exited

status=1

11月 05 15:30:10 localhost.localdomain systemd[1]: Failed to start LSB: Bring up/down networking.

11月 05 15:30:10 localhost.localdomain systemd[1]: Unit network.service entered failed state.

解决的办法，就是修改mac地址。

查看centos7复制出来的虚拟机的mac地址，需要执行“ip addr”，输出如下的类似信息：

[root@localhost~]# ip addr

1: lo:

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

inet 127.0.0.1/8 scope host lo

valid_lft forever preferred_lft forever

inet6::1/128 scope host

valid_lft forever preferred_lft forever

2: eno16777736:

link/ether00:0f:19:10:12:f1 brd ff:ff:ff:ff:ff:ff

inet 192.168.38.135/24 brd 192.168.38.255 scope global dynamic eno16777736

valid_lft 1681sec preferred_lft 1681sec

inet6 fe80::20c:11aa:ae11:4fe4/64 scope link

valid_lft forever preferred_lft forever

注意上面加粗加红的字，这就是新的mac地址。

接下来就剩下修改ifcfg-XXX文件了，只修改HWADDR就可以了。接下来执行service network restart就正常了。

Centos7下删除virbr0网卡信息的方法

说明：之前在CentOS7下配置过bridge，现在讲bridge模式改为普通模式后，查看网卡的时候还是可以看到很多垃圾信息，想彻底删除自己不想要的网卡配置信息，操作如下:

[root@linux-node1~]# ip add list1: lo: mtu 65536 qdisc noqueue state UNKNOWN qlen 1 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6::1/128 scope host valid_lft forever preferred_lft forever2: eth0: mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:0c:29:9b:7d:d6 brd ff:ff:ff:ff:ff:ff inet 10.10.10.11/24 brd 10.10.10.255 scope global eth0 valid_lft forever preferred_lft forever inet6 fe80::20c:29ff:fe9b:7dd6/64 scope link valid_lft forever preferred_lft forever4: virbr0: mtu 1500 qdisc noqueue state DOWN qlen 1000 link/ether 52:54:00:f4:24:05 brd ff:ff:ff:ff:ff:ff inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0 valid_lft forever preferred_lft forever5: virbr0-nic: mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000 link/ether 52:54:00:f4:24:05 brd ff:ff:ff:ff:ff:ff

查看网络列表：

[root@linux-node1~]# virsh net-list Name State Autostart Persistent---------------------------------------------------------- default active yes yes

使用“virsh net-destroy default”删除

[root@linux-node1~]# virsh net-destroy defaultNetwork default destroyed

从配置文件中剔除

[root@linux-node1~]# virsh net-undefine defaultNetwork default has been undefined

重启libvirtd服务

[root@linux-node1~]# systemctl restart libvirtd.service[root@linux-node1~]# virsh net-list Name State Autostart Persistent----------------------------------------------------------[root@linux-node1~]# ip add list1: lo: mtu 65536 qdisc noqueue state UNKNOWN qlen 1 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6::1/128 scope host valid_lft forever preferred_lft forever2: eth0: mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:0c:29:9b:7d:d6 brd ff:ff:ff:ff:ff:ff inet 10.10.10.11/24 brd 10.10.10.255 scope global eth0 valid_lft forever preferred_lft forever inet6 fe80::20c:29ff:fe9b:7dd6/64 scope link valid_lft forever preferred_lft forever

再次查看，发现不必要的信息已经清除，清爽多了

电脑新装系统配置怎么看centos7查看网卡信息及数量

环境：Centos 7.5

VMware 16.0.0

问题描述：

CentOS7.5新装系统如何查看网络，配置网卡信息

解决方案：

1.查看ip信息

ip a

ip a1: lo: mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6::1/128 scope host valid_lft forever preferred_lft forever2: ens33: mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 00:50:56:25:19:1c brd ff:ff:ff:ff:ff:ff inet 192.168.1.227/24 brd 192.168.1.255 scope global noprefixroute ens33 valid_lft forever preferred_lft forever inet6 fe80::36fd:c3d4:ea0a:5ab4/64 scope link noprefixroute valid_lft forever preferred_lft forever2.查看编辑网卡信息

vim/etc/sysconfig/network-scripts/ifcfg-ens33（网卡名）

TYPE=EthernetPROXY_METHOD=noneBROWSER_ONLY=noBOOTPROTO=noneDEFROUTE=yesIPV4_FAILURE_FATAL=noIPV6INIT=yesIPV6_AUTOCONF=yesIPV6_DEFROUTE=yesIPV6_FAILURE_FATAL=noIPV6_ADDR_GEN_MODE=stable-privacyNAME=ens33UUID=bf5bb7c5-da27-44a9-b4be-7f6e4138abfdDEVICE=ens33ONBOOT=yesIPADDR=192.168.1.227PREFIX=24GATEWAY=192.168.1.1重启网络服务

systemctl restart network

查看ens33网卡信息

ifconfig ens33

ens33: flags=4163 mtu 1500 inet 192.168.1.227 netmask 255.255.255.0 broadcast 192.168.1.255 inet6 fe80::36fd:c3d4:ea0a:5ab4 prefixlen 64 scopeid 0x20 ether 00:50:56:25:19:1c txqueuelen 1000(Ethernet) RX packets 29155875 bytes 2426699185(2.2 GiB) RX errors 0 dropped 108161 overruns 0 frame 0 TX packets 32605674 bytes 12952561612(12.0 GiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0启用ens33网卡

ifconfig ens33 up

禁用ens33网卡

ifconfig ens33 down

查看ens33网卡其他参数

ethtool ens33

Settings for ens33:Supported ports: [ TP ]Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Supported pause frame use: NoSupports auto-negotiation: YesSupported FEC modes: Not reportedAdvertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Advertised pause frame use: NoAdvertised auto-negotiation: YesAdvertised FEC modes: Not reportedSpeed: 1000Mb/sDuplex: FullPort: Twisted PairPHYAD: 0Transceiver: internalAuto-negotiation: onMDI-X: off(auto)Supports Wake-on: dWake-on: dCurrent message level: 0x00000007(7) drv probe linkLink detected: yesDNS设置

vim/etc/resolv.conf

nameserver 192.168.1.1关闭NetworkManager服务

systemctl stop NetworkManager.service停止开机自启

systemctl disable NetworkManager.service查看网络服务

systemctl status network.service

● network.service- LSB: Bring up/down networking Loaded: loaded(/etc/rc.d/init.d/network; bad; vendor preset: disabled) Active: active(running) since四 2022-03-17 23:58:09 CST; 7h left Docs: man:systemd-sysv-generator(8) Process: 975 ExecStart=/etc/rc.d/init.d/network start(code=exited, status=0/SUCCESS) CGroup:/system.slice/network.service└─1304/sbin/dhclient-1-q-lf/var/lib/dhclient/dhclient-f5774ec4-da78-4594-859b-a17bb015e929-ens33.lease-pf/var/run/dhclient-ens33.pid ens333月 17 23:58:06 localhost.localdomain network[975]:正在打开环回接口： [确定 ]3月 17 23:58:07 localhost.localdomain network[975]:正在打开接口 ens33：3月 17 23:58:07 localhost.localdomain dhclient[1193]: DHCPREQUEST on ens33 to 255.255.255.255 port 67(xid=0x2c76a023)3月 17 23:58:07 localhost.localdomain dhclient[1193]: DHCPACK from 192.168.1.1(xid=0x2c76a023)3月 17 23:58:09 localhost.localdomain NET[1300]:/usr/sbin/dhclient-script: updated/etc/resolv.conf3月 17 23:58:09 localhost.localdomain dhclient[1193]: bound to 192.168.1.227-- renewal in 10429 seconds.3月 17 23:58:09 localhost.localdomain network[975]:正在确定 ens33的 IP信息...完成。3月 17 23:58:09 localhost.localdomain NET[1350]:/etc/sysconfig/network-scripts/ifup-post: updated/etc/resolv.conf3月 17 23:58:09 localhost.localdomain network[975]: [确定 ]3月 17 23:58:09 localhost.localdomain systemd[1]: Started LSB: Bring up/down networking.查看网络服务日志

cat/var/log/messages| grep network

ar 17 23:53:00 localhost systemd: Started LSB: Bring up/down networking.Mar 17 23:54:11 localhost systemd: Stopping LSB: Bring up/down networking...Mar 17 23:54:12 localhost NET[3314]:/etc/sysconfig/network-scripts/ifdown-post: updated/etc/resolv.confMar 17 23:54:12 localhost network:正在关闭接口 ens33： [确定 ]Mar 17 23:54:12 localhost network:正在关闭环回接口： [确定 ]Mar 17 23:54:12 localhost systemd: Starting LSB: Bring up/down networking...Mar 17 23:54:12 localhost NET[3516]:/etc/sysconfig/network-scripts/ifup-post: updated