I did some work on root folder I think granting access rights on etc/lib folder, except this I did nothing, since then Wifi disappear from my ubuntu. I went across this article No wifi option on Ubuntu (18.04 and 16.04) but didn't work for me.
dmesg | grep ath
[ 2.290685] systemd[1]: /lib/systemd/system/spice-vdagentd.service:8: PIDFile=
references path below legacy directory /var/run/, updating /var/run/spice-
vdagentd/spice-vdagentd.pid → /run/spice-vdagentd/spice-vdagentd.pid; please update the
unit file accordingly.
[ 6.101805] audit: type=1107 audit(1589708256.391:65): pid=1075 uid=103 auid=4294967295
ses=4294967295 msg='apparmor="DENIED" operation="dbus_method_call" bus="system"
path="/org/freedesktop/systemd1" interface="org.freedesktop.systemd1.Manager"
member="GetDynamicUsers" mask="send" name="org.freedesktop.systemd1" pid=1211
label="/usr/sbin/mysqld" peer_pid=1 peer_label="unconfined"
rfkill全部列出
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
须藤lshw -c网络
*-network UNCLAIMED
description: Network controller
product: Intel Corporation
vendor: Intel Corporation
physical id: 14.3
bus info: pci@0000:00:14.3
version: 00
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix bus_master cap_list
configuration: latency=0
resources: memory:b4318000-b431bfff
*-network
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:03:00.0
logical name: eno1
version: 15
serial: 04:0e:3c:1c:3a:0e
size: 1Gbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical tp mii 10bt
10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 duplex=full
firmware=rtl8168h-2_0.0.2 02/26/15 ip=192.168.1.119 latency=0 link=yes multicast=yes
port=MII speed=1Gbit/s
resources: irq:16 ioport:3000(size=256) memory:b4204000-b4204fff memory:b4200000-b4203fff
