[ubuntu] wlan0 is missing

HTML Code:

enp2s0    no wireless extensions.
lo        no wireless extensions.

HTML Code:

*-network               
       description: Etheet interface
       product: RTL8111/8168/8411 PCI Express Gigabit Etheet Controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: enp2s0
       version: 10
       serial: d0:17:c2:14:a2:b6
       size: 100Mbit/s
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix vpd bus_master cap_list etheet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl8168g-3_0.0.1 04/23/13 ip=192.168.0.110 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s
       resources: irq:127 ioport:d000(size=256) memory:dfc04000-dfc04fff memory:dfc00000-dfc03fff
  *-network
       description: Network controller
       product: Qualcomm Atheros
       vendor: Qualcomm Atheros
       physical id: 0
       bus info: pci@0000:03:00.0
       version: 30
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list
       configuration: driver=ath10k_pci latency=0
       resources: irq:130 memory:df000000-df1fffff

HTML Code:

02:00.0 Etheet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Etheet Controller [10ec:8168] (rev 10)
03:00.0 Network controller [0280]: Qualcomm Atheros Device [168c:0042] (rev 30)