我在我的 Lenovo 笔记本电脑和 KDE 上安装了 Centos 7 64 位一段时间，一切都很棒！昨晚我试图让 Dolphin 显示视频缩略图，花了一些时间，但不幸的是，当我重新启动笔记本电脑时，我发现没有 wifi！我确实更新了系统（sudo yum update）并安装了一些 ffmpeg 软件包，但仅此而已，现在（网络）服务已关闭并且无法启动此外，当我尝试“nmtui”时，根本没有 wifi 连接！
以下是我认为可能有助于理解的命令的一些输出
# lspci -nnk | grep -i net -A2
06:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8188CE 802.11b/g/n WiFi Adapter [10ec:8176] (rev 01)
Subsystem: Realtek Semiconductor Co., Ltd. Device [10ec:8195]
Kernel driver in use: rtl8192ce
--
0c:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 07)
Subsystem: Lenovo Device [17aa:21f7]
Kernel driver in use: r8169
和
[root@localhost ~]# ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: enp12s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN mode DEFAULT qlen 1000
link/ether 3c:97:0e:dd:c7:62 brd ff:ff:ff:ff:ff:ff
3: wlp6s0: <BROADCAST,MULTICAST> mtu 1500 qdisc mq state DOWN mode DEFAULT qlen 1000
link/ether 40:f0:2f:7a:1a:80 brd ff:ff:ff:ff:ff:ff
4: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT qlen 1000
link/ether 52:54:00:66:cf:5e brd ff:ff:ff:ff:ff:ff
5: virbr0-nic: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN mode DEFAULT qlen 1000
link/ether 52:54:00:66:cf:5e brd ff:ff:ff:ff:ff:ff
和
# systemctl status network.service
● 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 Wed 2017-10-25 10:57:25 EET; 24s ago
Docs: man:systemd-sysv-generator(8)
Process: 2477 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=1/FAILURE)
Oct 25 10:57:25 localhost.localdomain network[2477]: RTNETLINK answers: File exists
Oct 25 10:57:25 localhost.localdomain network[2477]: RTNETLINK answers: File exists
Oct 25 10:57:25 localhost.localdomain network[2477]: RTNETLINK answers: File exists
Oct 25 10:57:25 localhost.localdomain network[2477]: RTNETLINK answers: File exists
Oct 25 10:57:25 localhost.localdomain network[2477]: RTNETLINK answers: File exists
Oct 25 10:57:25 localhost.localdomain network[2477]: RTNETLINK answers: File exists
Oct 25 10:57:25 localhost.localdomain systemd[1]: network.service: control process exited, code=exited status=1
Oct 25 10:57:25 localhost.localdomain systemd[1]: Failed to start LSB: Bring up/down networking.
Oct 25 10:57:25 localhost.localdomain systemd[1]: Unit network.service entered failed state.
Oct 25 10:57:25 localhost.localdomain systemd[1]: network.service failed.
最后
# systemctl start network
Job for network.service failed because the control process exited with error code. See "systemctl status network.service" and "journalctl -xe" for details.
network-scripts]# ls
ifcfg-enp12s0 ifdown-eth ifdown-post ifdown-TeamPort ifup-eth ifup-plip ifup-sit init.ipv6-global
ifcfg-lo ifdown-ib ifdown-ppp ifdown-tunnel ifup-ib ifup-plusb ifup-Team keys-orange-admin
ifcfg-orange-admin ifdown-ippp ifdown-routes ifup ifup-ippp ifup-post ifup-TeamPort network-functions
ifdown ifdown-ipv6 ifdown-sit ifup-aliases ifup-ipv6 ifup-ppp ifup-tunnel network-functions-ipv6
ifdown-bnep ifdown-isdn ifdown-Team ifup-bnep ifup-isdn ifup-routes ifup-wireless