我可以看到 WiFi 连接，但我无法连接到它。
$ iwconfig
wlp2s0 IEEE 802.11 ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=20 dBm
Retry short limit:7 RTS thr=2347 B Fragment thr:off
Power Management:off
lo no wireless extensions.
enp1s0 no wireless extensions.
enp0s20u1 no wireless extensions.
我使用以下方法更新了我的系统：
sudo apt-get update && sudo apt-get dist-upgrade
然后重新启动它，但什么也没发生。
$ lspci -knn | grep Net -A3**
02:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter [10ec:b723]
Subsystem: Hewlett-Packard Company RTL8723BE PCIe Wireless Network Adapter [103c:804c]
Kernel driver in use: rtl8723be
Kernel modules: rtl8723be, wl
更新
$ sudo lshw -C network
*-network
description: Ethernet interface
product: RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:01:00.0
logical name: enp1s0
version: 07
serial: 70:5a:0f:d3:46:d0
size: 10Mbit/s
capacity: 100Mbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl8106e-1_0.0.1 06/29/12 latency=0 link=no multicast=yes port=MII speed=10Mbit/s
resources: irq:43 ioport:4000(size=256) memory:c1200000-c1200fff memory:c1000000-c1003fff
*-network
description: Wireless interface
product: RTL8723BE PCIe Wireless Network Adapter
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlp2s0
version: 00
serial: 68:14:01:68:3e:67
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=rtl8723be driverversion=4.8.0-36-generic firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11
resources: irq:17 ioport:3000(size=256) memory:c1100000-c1103fff
*-network
description: Ethernet interface
physical id: 3
logical name: enp0s20u1
serial: d6:e5:75:79:38:fc
capabilities: ethernet physical
configuration: broadcast=yes driver=rndis_host driverversion=22-Aug-2005 firmware=RNDIS device ip=192.168.42.209 link=yes multicast=yes
更新：我收到了与 wifi 相关的错误消息。如何解决这个问题。 错误
我可以清除它吗？
$ locate rtlwifi-new-dkms
/home/maddy/.cache/upstart/update-notifier-crash-_var_crash_rtlwifi-new-dkms.0.crash.log.1.gz
/home/maddy/.cache/upstart/update-notifier-crash-_var_crash_rtlwifi-new-dkms.0.crash.log.2.gz
/home/maddy/.cache/upstart/update-notifier-crash-_var_crash_rtlwifi-new-dkms.0.crash.log.3.gz
/home/maddy/.cache/upstart/update-notifier-crash-_var_crash_rtlwifi-new-dkms.0.crash.log.4.gz
/home/maddy/.cache/upstart/update-notifier-crash-_var_crash_rtlwifi-new-dkms.0.crash.log.5.gz
/home/maddy/.cache/upstart/update-notifier-crash-_var_crash_rtlwifi-new-dkms.0.crash.log.6.gz
/home/maddy/.cache/upstart/update-notifier-crash-_var_crash_rtlwifi-new-dkms.0.crash.log.7.gz
/usr/share/rtlwifi-new-dkms
/usr/share/rtlwifi-new-dkms/postinst
/var/cache/apt/archives/rtlwifi-new-dkms_0.10_all.deb
/var/lib/dpkg/info/rtlwifi-new-dkms.list
/var/lib/dpkg/info/rtlwifi-new-dkms.md5sums
/var/lib/dpkg/info/rtlwifi-new-dkms.postinst
/var/lib/dpkg/info/rtlwifi-new-dkms.prerm