在为 Ubuntu 12.04 安装大量更新后，我的无线连接停止工作。但是，我发现我可以访问其他无线网络；我只是无法访问更新前一直在使用的那个。有没有办法完全删除无线网络并将其重新添加回来，这样它就会像一个“新”无线网络，我就可以使用它了？（我尝试在“编辑连接”中删除并重新添加它，但这没有用。）或者还有其他方法可以解决这个问题吗？
谢谢。
更新：
我使用命令删除了无法正常工作的网络连接sudo rm /etc/NetworkManager/system-connections/name-of-connection，然后通过生成所有网络连接的列表确认该连接已被删除。但是，这不起作用。
因为cat /etc/lsb-release; uname -a，我得到了
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=12.04
DISTRIB_CODENAME=precise
DISTRIB_DESCRIPTION="Ubuntu 12.04.2 LTS"
Linux Aspire4830T 3.5.0-37-generic #58~precise1-Ubuntu SMP Wed Jul 10
17:48:11 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
因为lspci -nnk | grep -iA2 net，我得到了
02:00.0 Ethernet controller [0200]: Atheros Communications Inc. AR8151 v2.0
Gigabit Ethernet [1969:1083] (rev c0)
Subsystem: Acer Incorporated [ALI] Device [1025:054f]
正在使用的内核驱动程序：atl1c
03:00.0 Network controller [0280]: Atheros Communications Inc. AR9287
Wireless Network Adapter (PCI-Express) [168c:002e] (rev 01)
Subsystem: Foxconn International, Inc. Device [105b:e034]
Kernel driver in use: ath9k
因为lsusb，我得到了
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 064e:d250 Suyin Corp.
因为iwconfig，我得到了
eth0 no wireless extensions.
lo no wireless extensions.
wlan0 IEEE 802.11bgn ESSID:"ubcsecure"
Mode:Managed Frequency:2.437 GHz Access Point: A0:CF:5B:A3:DF:92
Bit Rate=117 Mb/s Tx-Power=27 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=70/70 Signal level=-39 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:9 Invalid misc:2 Missed beacon:0
对于rfkill list all，我得到了 0：phy0：无线局域网软阻止：否硬阻止：否 1：acer-wireless：无线局域网软阻止：否硬阻止：否 2：acer-bluetooth：蓝牙软阻止：是硬阻止：否
因为lsmod，我得到了
Module Size Used by
ath3k 12969 0
btusb 22432 0
pci_stub 12623 1
vboxpci 23237 0
vboxnetadp 25671 0
vboxnetflt 23479 0
snd_hda_codec_hdmi 32476 1
snd_hda_codec_conexant 62363 1
vboxdrv 282562 3 vboxpci,vboxnetadp,vboxnetflt
coretemp 13642 0
kvm_intel 137888 0
kvm 422160 1 kvm_intel
joydev 17694 0
acer_wmi 32845 0
sparse_keymap 13891 1 acer_wmi
xt_hl 12522 6
ip6t_rt 12559 3
nf_conntrack_ipv6 14107 7
nf_defrag_ipv6 13413 1 nf_conntrack_ipv6
ipt_REJECT 12577 1
xt_LOG 17454 9
snd_hda_intel 34063 3
snd_hda_codec 135141 3
snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_intel
snd_hwdep 17765 1 snd_hda_codec
xt_limit 12712 12
xt_tcpudp 12604 18
snd_pcm 97523 3
snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
uvcvideo 78117 0
videobuf2_core 33025 1 uvcvideo
videodev 125126 2 uvcvideo,videobuf2_core
videobuf2_vmalloc 12861 1 uvcvideo
videobuf2_memops 13405 1 videobuf2_vmalloc
xt_addrtype 12714 4
xt_state 12579 14
microcode 23030 0
snd_seq_midi 13325 0
ip6table_filter 12816 1
snd_rawmidi 30750 1 snd_seq_midi
ip6_tables 27686 2 ip6t_rt,ip6table_filter
snd_seq_midi_event 14900 1 snd_seq_midi
nf_conntrack_netbios_ns 12666 0
nf_conntrack_broadcast 12590 1 nf_conntrack_netbios_ns
nf_nat_ftp 12705 0
nf_nat 25646 1 nf_nat_ftp
nf_conntrack_ipv4 14531 9 nf_nat
snd_seq 61931 2 snd_seq_midi,snd_seq_midi_event
nf_defrag_ipv4 12730 1 nf_conntrack_ipv4
arc4 12530 2
nf_conntrack_ftp 13453 1 nf_nat_ftp
nf_conntrack 83300 8 nf_conntrack_ipv6,xt_state,nf_conntrack_netbios_ns,nf_conntrack_broadcast,nf_nat_ftp,nf_nat,nf_conntrack_ipv4,nf_conntrack_ftp
mei 41410 0
iptable_filter 12811 1
snd_timer 29990 2 snd_pcm,snd_seq
snd_seq_device 14498 3 snd_seq_midi,snd_rawmidi,snd_seq
ip_tables 27474 1 iptable_filter
x_tables 29892 12
xt_hl,ip6t_rt,ipt_REJECT,xt_LOG,xt_limit, xt_tcpudp,xt_addrtype,xt_state,ip6table_filter, ip6_tables,iptable_filter,ip_tables
ath9k 133095 0
psmouse 102506 0
mac80211 555272 1 ath9k
ath9k_common 14054 1 ath9k
ath9k_hw 399752 2 ath9k,ath9k_common
ath 24124 3 ath9k,ath9k_common,ath9k_hw
serio_raw 13216 0
snd 83674 16
snd_hda_codec_hdmi,snd_hda_codec_conexant,snd_hda_intel,snd_hda_codec,
snd_hwdep, snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
lpc_ich 17145 0
cfg80211 208382 3 ath9k,mac80211,ath
soundcore 15092 1 snd
snd_page_alloc 18573 2 snd_hda_intel,snd_pcm
rtsx_pci_ms 13181 0
memstick 16606 1 rtsx_pci_ms
bnep 18240 2
parport_pc 32867 0
rfcomm 47562 0
bluetooth 211860 12 ath3k,btusb,bnep,rfcomm
ppdev 17114 0
ext2 73799 1
mac_hid 13254 0
lp 17800 0
parport 46563 3 parport_pc,ppdev,lp
dm_crypt 23126 1
rtsx_pci_sdmmc 17801 0
ghash_clmulni_intel 13221 0
aesni_intel 51134 26
cryptd 20531 10 ghash_clmulni_intel,aesni_intel
aes_x86_64 17256 1 aesni_intel
atl1c 42092 0
ahci 25869 2
libahci 27338 1 ahci
i915 535221 3
drm_kms_helper 49259 1 i915
drm 290595 4 i915,drm_kms_helper
rtsx_pci 33680 2 rtsx_pci_ms,rtsx_pci_sdmmc
i2c_algo_bit 13565 1 i915
video 19653 2 acer_wmi,i915
wmi 19257 1 acer_wmi
答案1
尝试删除 /etc/NetworkManager/system-connection/ 下的所有连接文件
使用此命令：
rm -iv /etc/NetworkManager/system-connection/*