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[ubuntu] Make VPN Automatically reconnect at Dropped Internet Connection?

April 6, 2016, 11:51 pm
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Hi,

I'm running Ubuntu 15.10. I would like this installation to stay connected to VPN at all times. I have configured the ethernet connection to automatically connect, see: http://i.imgur.com/ev5M9QX.png

The automatic connection works fine. But if my Internet connection drops, Ubuntu statys in "VPN" mode but the VPN connection is dropped - so I'm unable to access the Internet. The only fix, is logging on locally and manually disconnect, then reconnect the VPN. Then it works as intended.

My question is if it possible to make Ubuntu automatically disconnect and reconnect the VPN if the VPN connection is dropped for some reason?

Thanx :)
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[ubuntu] Cable unplugged

April 7, 2016, 1:51 am
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I newly installed my computer with Ubuntu 12.04.4. When I startup the computer, I get one notification of "Network Disconnected - you are new offline".

I have checked the network. The message is shown as following.

Code:
Wired
cable unplugged
Hardware Address AA:BB:CC:DD:55:66:77:88
IPv4 Address 127.0.0.1
IPv6 Address ::1
Subnet Mask 127.0.0.1
Default Route 127.0.0.1
DNS 127.0.0.1
I checked the LAN cable and tried to unplug and plugin for many times. And I also used the same cable to connect to another computer which are installed Windows. It showed that the network cable is OK.

The following message was obtained with the command "ifconfig -a".
Code:
lo        Link encap:Local Loopback 
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:504 errors:0 dropped:0 overruns:0 frame:0
          TX packets:504 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:31696 (31.6 KB)  TX bytes:31696 (31.6 KB)
Anybody can help me to solve the problem. Thank you very much.
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Can anyone help? I have problems turning my laptop to a wireless Access Point

April 7, 2016, 7:55 am
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Greetings to all!

I have an old laptop Dell xps m1330 which I want to turn into an AP and use its internal wireless adapter to provide devices connected to it, access to the internet. I have found this link useful in doing so the above: https://help.ubuntu.com/community/Wi...essAccessPoint.

I have followed the steps in this webpage to configure my devices.

ifconfig gives this output:

wlp12s0 Link encap:Ethernet HWaddr 00:1c:bf:32:c2:5e
inet addr:192.168.1.62 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::21c:bfff:fe32:c25e/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2716 errors:0 dropped:0 overruns:0 frame:0
TX packets:1639 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1073397 (1.0 MB) TX bytes:275602 (275.6 KB)

wlx00c0ca464f8d Link encap:Ethernet HWaddr 00:c0:ca:46:4f:8d
inet addr:10.0.0.7 Bcast:10.0.0.255 Mask:255.255.255.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

Some clarifications:
1. wlp12s0: It is the laptops internal wireless adapter's interface that is connected to the internet
2. wlx00c0ca464f8d: It is the usb adapter's interface which I have configure to be an AP using hostapd

Some info on the devices with lshw -C network:

1. wlp12s0: configuration: broadcast=yes driver=iwl3945 driverversion=4.2.0-16-generic firmware=15.32.2.9 ip=192.168.1.62 latency=0 link=yes multicast=yes wireless=IEEE 802.11abg
2. wlx00c0ca464f8d: configuration: broadcast=yes driver=rt2800usb driverversion=4.2.0-16-generic firmware=0.29 ip=10.0.0.7 link=no multicast=yes wireless=IEEE 802.11bgn

Both networks seem to be up. However the AP does not seem to be broadcasting and therefore it does not appear in the list of networks.

I have 2 questions currently:
1. How do I make the AP to broadcast and hence being able to connect to it.
2. How I can "bridge" the two wireless adapters, so that all devices connected to the AP have access to the internet as well?

I would much appreciate any help.
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[all variants] Samba security questions

April 7, 2016, 8:29 am
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So I was asking myself how secure is setting up Samba for sharing files within my local network. Stumbled upon a rather interesting video from Nixie Pixel (https://www.youtube.com/watch?v=-wUfzdiE4m8), but not sure if all steps described in the video are really necessary (or even what they mean). So I'll start listing some of the steps and questions below:

- Do I really need to create a new user account just for samba (e.g "sambaguest") ?
- Is it really necessary to disable /bin/bash for "sambaguest" ? And what does it even mean?
- What are the disadvantages (or possible threats) to not doing such procedures described in the video?

Any additional information on the matter is pretty much welcome!

Thanks!
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[all variants] Strange behavior while transferring files with Samba

April 7, 2016, 8:51 am
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So this is really really weird stuff. I'll try and explain a little more in detail for you.

I have a home network comprised of multiple computers for testing, most of which have Linux distributions along with Samba and Samba client. The thing is whenever I perform file transfers between two Linux distros using samba, I can verify a considerable dip in file transfer speeds IF for example I'm transferring files that are NOT in the home folder or pertaining directory structure. For example if I'm transferring from a device that is in /media/ folder, it will slow down (on a 100mbit LAN, I am losing about 2mbps/sec average).

These numbers are consistent and regardless of which Linux distro I'm running or computers I'm testing with. I wonder if it has anything to do with file systems and samba or something. It's pretty annoying.

Thanks!
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[server] External network not available

April 7, 2016, 9:00 am
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Hello everyone,
I got some problem with my network on a server.
Here is the configuration.
I got 2 ubuntu server as VM. Both same version (15.10), updated at the same time before problems appeared.
The first one is ok, everything is fine.

The second one is messy.
I can access the web site from outside.
I can connect from outside.

But when I'm connected I can not go outside. "ping 8.8.8.8" does not work, as any dig command (connection timed out, even with dig @8.8.8.8)
I compared my resolv.conf file with the good one, it's the same.
Ethernet is up
The network configuration from the server (proxmox) are the same for both VM

I supposed first that some application was blocking me, but I stopped almost all applications running non-system

I don't know where to look. I didn't find something already posted about this (people can ping an ip address or they have no network at all)

Does someone have some tips for a better investigation ?

Thanks in advance.
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Problems with WI-FI on Ubuntu 14.04 (HP 250 g4)

April 7, 2016, 12:42 pm
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Hello everybody,

Since I installed Ubuntu 14.04 on my new HP 250 g4 laptop I've been experiencing random wi-fi signal dropouts (pages seem to load forever even though the wifi icon shows that I'm connected). I'm also frequently asked for wi-fi password.

The same goes for Linux Mint 17.02 which is installed as a second OS on the same laptop.

What's interesting, my wife has got Ubuntu 14.04 installed on her netbook (Samsung N150 Plus) and it runs flawlessly. (I've tried to compare wireless-scripts on our both machines but I couldn't find anything different that could possibly explain my problem).

I also noticed that it is common problem for this particular Ubuntu distribution but going through countless number of threads and not being able to find solution I finally decided to ask professionals for help with this because, to be honest, it's getting quite unbearable.

I'm also attaching wireless-info.txt.

Thank you in advance
Attached Files
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[UbuntuGnome] Network Applet Shows no Wired Connections

April 7, 2016, 1:16 pm
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Wired and wireless in general are working. The Network applet shows a list of available wireless networks from which I can select one to connect to.

So far so good. Unluckily no wired connections are displayed in the applet. If I connect the system to a dhcp network it works, but no wired network symbol is shown in the applet.

I got this behaviour already when upgrading from 12.04 to 14.04, still I don't needed the functionality (dhcp was enough) until now ... But again I need to switch easily between various static network configurations. I use gnome desktop with gdm as display manager. I'm running several other systems which are Debian based with the same desktop:Wired connections shown normally in the applet. And Kubuntu showed wired connections until I upgraded from 12.04.

Driver problems and network misconfiguration are less likely since the network is working in general. I assume the problem somewhere between the gnome desktop and nm-applet, probably the communication between those components. Anyone with an idea?

2000Rogers
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[SOLVED] Unable to view external sites (Wired connection)

April 7, 2016, 2:59 pm
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Ubuntu 15.10 in Hyper-V
Wired Network in host setup as "External Connection" in Hyper-V

Within Terminal I can ping local home network hosts and external hosts (e.g. google.com) without issue.
In Firefox I can load pages on another local home network computer but cannot load any external websites (e.g. google.com)
Ubuntu software manager is unable to download any updates or software.

Any ideas why I would be able to successfully ping any internet servers but unable to access them in applications (but can local servers)?

Thanks!

[EDIT - SOLVED]: Not sure what was going on but (yet another_ reboot of both the host and the virtual machine and it seems ok now
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having a wifi problem

April 7, 2016, 4:48 pm
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my wifi isnt working and i can use my wired connection.

it is the result of the scrpit:
Code:

########## wireless info START ##########

Report from: 08 Apr 2016 02:07 IDT +0300

Booted last: 08 Apr 2016 01:44 IDT +0300

Script from: 27 Sep 2015 00:34 UTC +0000

##### release ###########################

Distributor ID:    Ubuntu
Description:    Ubuntu 14.04.3 LTS
Release:    14.04
Codename:    trusty

##### kernel ############################

Linux 3.16.0-69-generic #89~14.04.1-Ubuntu SMP Thu Mar 17 20:51:04 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

Parameters: ro, quiet, splash

##### desktop ###########################

Ubuntu (from ~/.dmrc)

##### lspci #############################

0d:00.0 Ethernet controller [0200]: Qualcomm Atheros AR8151 v2.0 Gigabit Ethernet [1969:1083] (rev c0)
    Subsystem: LG Electronics, Inc. Device [1854:0871]
    Kernel driver in use: atl1c

##### lsusb #############################

Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 004: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)
Bus 001 Device 003: ID 5986:04a5 Acer, Inc
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

##### PCMCIA card info ##################

##### rfkill ############################

0: hci0: Bluetooth
    Soft blocked: no
    Hard blocked: no

##### lsmod #############################

mxm_wmi                13021  1 nouveau
wmi                    19193  2 mxm_wmi,nouveau

##### interfaces ########################

auto lo
iface lo inet loopback

##### ifconfig ##########################

eth0      Link encap:Ethernet  HWaddr <MAC 'eth0' [IF]> 
          inet addr:192.168.1.14  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::<IP6 'eth0' [IF]>/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:18072 errors:0 dropped:0 overruns:0 frame:0
          TX packets:12999 errors:0 dropped:0 overruns:0 carrier:3
          collisions:0 txqueuelen:1000
          RX bytes:19160744 (19.1 MB)  TX bytes:1446348 (1.4 MB)

##### iwconfig ##########################

eth0      no wireless extensions.

lo        no wireless extensions.

##### route #############################

Kernel IP routing table
Destination    Gateway        Genmask        Flags Metric Ref    Use Iface
0.0.0.0        192.168.1.1    0.0.0.0        UG    0      0        0 eth0
192.168.1.0    0.0.0.0        255.255.255.0  U    1      0        0 eth0

##### resolv.conf #######################

nameserver 127.0.1.1

##### network managers ##################

Installed:

    NetworkManager

Running:

root      762    1  0 01:44 ?        00:00:00 NetworkManager

##### NetworkManager info ###############

NetworkManager Tool

State: connected (global)

- Device: eth0  [Wired connection 1] -------------------------------------------
  Type:              Wired
  Driver:            atl1c
  State:            connected
  Default:          yes
  HW Address:        <MAC 'eth0' [IF]>

  Capabilities:
    Carrier Detect:  yes
    Speed:          1000 Mb/s

  Wired Properties
    Carrier:        on

  IPv4 Settings:
    Address:        192.168.1.14
    Prefix:          24 (255.255.255.0)
    Gateway:        192.168.1.1

    DNS:            213.57.2.5
    DNS:            213.57.22.5

##### NetworkManager.state ##############

[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
WimaxEnabled=true

##### NetworkManager.conf ###############

[main]
plugins=ifupdown,keyfile,ofono
dns=dnsmasq

[ifupdown]
managed=false

##### NetworkManager profiles ###########

##### iw reg get ########################

Region: Asia/Jerusalem (based on set time zone)

country 00:
    (2402 - 2472 @ 40), (6, 20)
    (2457 - 2482 @ 40), (6, 20), PASSIVE-SCAN
    (2474 - 2494 @ 20), (6, 20), NO-OFDM, PASSIVE-SCAN
    (5170 - 5250 @ 160), (6, 20), PASSIVE-SCAN
    (5250 - 5330 @ 160), (6, 20), DFS, PASSIVE-SCAN
    (5490 - 5730 @ 160), (6, 20), DFS, PASSIVE-SCAN

##### iwlist channels ###################

eth0      no frequency information.

lo        no frequency information.

##### iwlist scan #######################

eth0      Interface doesn't support scanning.

lo        Interface doesn't support scanning.

##### module infos ######################

##### module parameters #################

##### /etc/modules ######################

lp
rtc

##### modprobe options ##################

[/etc/modprobe.d/blacklist-ath_pci.conf]
blacklist ath_pci

[/etc/modprobe.d/blacklist.conf]
blacklist evbug
blacklist usbmouse
blacklist usbkbd
blacklist eepro100
blacklist de4x5
blacklist eth1394
blacklist snd_intel8x0m
blacklist snd_aw2
blacklist i2c_i801
blacklist prism54
blacklist bcm43xx
blacklist garmin_gps
blacklist asus_acpi
blacklist snd_pcsp
blacklist pcspkr
blacklist amd76x_edac

[/etc/modprobe.d/blacklist-rare-network.conf]
alias net-pf-3 off
alias net-pf-6 off
alias net-pf-9 off
alias net-pf-11 off
alias net-pf-12 off
alias net-pf-19 off
alias net-pf-21 off
alias net-pf-36 off

[/etc/modprobe.d/iwlwifi.conf]
remove iwlwifi \
(/sbin/lsmod | grep -o -e ^iwlmvm -e ^iwldvm -e ^iwlwifi | xargs /sbin/rmmod) \
&& /sbin/modprobe -r mac80211

[/etc/modprobe.d/mlx4.conf]
softdep mlx4_core post: mlx4_en

##### rc.local ##########################

exit 0

##### pm-utils ##########################

##### udev rules ########################

[/etc/udev/rules.d/70-persistent-net.rules]
# PCI device 0x1969:0x1083 (atl1c)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<MAC 'eth0' [IF]>", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

##### dmesg #############################

[  14.326960] atl1c 0000:0d:00.0: atl1c: eth0 NIC Link is Up<1000 Mbps Full Duplex>
[  42.653083] atl1c 0000:0d:00.0: atl1c: eth0 NIC Link is Down
[  52.137107] atl1c 0000:0d:00.0: atl1c: eth0 NIC Link is Up<1000 Mbps Full Duplex>

########## wireless info END ############
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Bluetooth 4.2 USB Adapter

April 7, 2016, 6:51 pm
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I really just need a new bluetooth adapter after struggling for many years with my Broadcom adapter, which finally doesn't work at all in 16.04, but looking at what's out there, it's just weird consumer brands, in my opinion.

Any major brands making "professional" bluetooth adapters; I just can't take more bluetooth problems;)

Any pointers?
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Bluetooth not working Ubuntu 14.04

April 7, 2016, 7:36 pm
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So I'm new to using ubuntu daily. I'm loving Ubuntu vs. any version of windows I have used. Only thing is I cant seem to get my bluetooth to work. Any help would be appreciated. Thanks in advance!
Laptop:
Dell Inspiron 1545
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Apparent internet problem

April 7, 2016, 8:46 pm
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I now have two threads going at once. I don't know if the problems are connected.

I am connecting my desktop through an ethernet connection. It appears to recognize the connection, reports a connection speed but when I try to download updates it fails and says to check my internet connection. I had the same problem using a usb wireless adapter. I am currently booting in recovery mode due to a graphics problem. The Windows side has no problems with any of this so it isn't a hardware issue.

I don't know how to troubleshoot this internet (or update) problem in Linux. Any help would be appreciated.
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[ubuntu] How to install a Linux router?

April 7, 2016, 9:35 pm
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Hi all,

Connection
FTTH (500mbps) -> ONT (4 ports) -> 2 PCs-Virtual Machine
(Dynamic IP)

ONT-Huawei HG8045

Oracle VirtualBox
Host Ubuntu 14.04 desktop
VMs Ubuntu 14.04 desktop/server/Windows 10 etc.
(PC-4/8 cores, RAM-8/32G, HDD-SSD 1TB, about 20 VMs running on each Virtual Machine)

ONT assigned IP - 192.168.8.2/3/4/5 etc.

Instead of connecting a hardware router to the network, I'm considering building a Linux router on a VM running Ubuntu 14.04 desktop/server.

Please advise which software shall I use pfsense/Quagga any others?

Thanks

Regards
satimis
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[ubuntu] Help me pls. My PC not showing Ethernet and not detecting Ethernet card

April 8, 2016, 2:13 am
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My PC not showing Ethernet and not detecting Ethernet card. And I tried to install LAN driver Realtek RTL8111B 10/100/1000 but I couldn't find for Ubuntu.

When i type in terminal

Code:
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:4509 errors:0 dropped:0 overruns:0 frame:0
TX packets:4509 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:423269 (423.2 KB) TX bytes:423269 (423.2 KB)

usb0 Link encap:Ethernet HWaddr ca:c9:5f:95:15:ec
inet addr:192.168.42.116 Bcast:192.168.42.255 Mask:255.255.255.0
inet6 addr: fe80::c8c9:5fff:fe95:15ec/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:25627 errors:7 dropped:0 overruns:0 frame:7
TX packets:25206 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:30412334 (30.4 MB) TX bytes:3672481 (3.6 MB)
That’s all... I am new in Ubuntu and from Kyrgyzstan pls help me
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DHCP Relay and Firewall

April 8, 2016, 4:45 am
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Hi,

I was wondering if anyone can advise me on how to setup a DHCP relay on an Ubuntu firewall. So far the only thing that is configured is masquerading and this is working as I can cross between one subnet to the other but I can't get isc-dhcp-relay to work (its installed on the same ubuntu server). Any advise would be greatly appreciated.
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Can't get my second network card to work on ubuntu server

April 8, 2016, 7:06 am
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I am using ubuntu server to setup and use my server, I added an extra network card in the system because the network socket on the motherboard only supports 100mbit.

The pci card I added is the D-Link DQE-528T. But I cannot get the card up in running.

This is some commands I tried to diagnose the problem: (I am not an Ubuntu expert, I am kinda new to Ubuntu server, so I don't understand everything in here so I can't find the problem).

Quote:
sudo lshw -C network
Code:
  *-network
      description: Ethernet interface
      product: MCP73 Ethernet
      vendor: NVIDIA Corporation
      physical id: f
      bus info: pci@0000:00:0f.0
      logical name: eth0
      version: a2
      serial: 90:fb:a6:2f:c9:90
      size: 100Mbit/s
      capacity: 100Mbit/s
      width: 32 bits
      clock: 66MHz
      capabilities: pm msi bus_master cap_list ethernet physical mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
      configuration: autonegotiation=on broadcast=yes driver=forcedeth driverversion=0.64 duplex=full ip=192.168.0.193 latency=0 link=yes maxlatency=20 mingnt=1 multicast=yes port=MII speed=100Mbit/s
      resources: irq:29 memory:efffd000-efffdfff ioport:f600(size=8) memory:efffc000-efffc0ff memory:efffb000-efffb00f
Btw the eth0 is my onboard network adapter.
Quote:
ifconfig
Code:
eth0      Link encap:Ethernet  HWaddr 90:fb:a6:2f:c9:90
          inet addr:192.168.0.193  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::92fb:a6ff:fe2f:c990/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:303 errors:0 dropped:0 overruns:0 frame:0
          TX packets:470 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:26604 (26.6 KB)  TX bytes:95106 (95.1 KB)
 
lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:40 errors:0 dropped:0 overruns:0 frame:0
          TX packets:40 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:2712 (2.7 KB)  TX bytes:2712 (2.7 KB)
Quote:
dmesg | grep eth0
Code:
[    2.246672] forcedeth 0000:00:0f.0: ifname eth0, PHY OUI 0x732 @ 1, addr 90:fb:a6:2f:c9:90
[    9.021486] init: network-interface (eth0) pre-start process (493) terminated with status 1
[    9.143300] init: network-interface (eth0) post-stop process (518) terminated with status 1
[ 2075.662801] forcedeth 0000:00:0f.0 eth0: MSI enabled
Quote:
ps aux | grep -i network
Code:
kevin    1262  0.0  0.0  10468  2228 pts/0    S+  22:40  0:00 grep --color=auto -i network
Does anybody have an idea how to get the card working?
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e1000e DHCP not working 16.04 LTS beta 2

April 8, 2016, 7:40 am
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Hi Folks,

I'm playing with 16.04 Beta 2 ... and can't seem to get my e1000e to work via DHCP... I see the DHCPDISCOVER's going out... but, never get anything back. This is in a Dell Precision M6800 lappy... and it works just fine in Windoze.

Any thoughts?
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network manager cannot deal with manual channel selection on router

April 8, 2016, 8:57 am
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I have encountered a weird problem when trying to improve wireless reception in my house.

On my TalkTalk super router (Huawei HG635) I changed the 2.4GHz channel from Auto(9) to 6. Then the WLAN is no longer visible in the network manager. I use kubuntu 14.04 LTS. I also used the LinSSID tool, where the network also no longer appears.

If I manually set the channel to 9, the network is visible, but I cannot connect to it. Upon entering the password I get the notification that the network was disconnected. Setting the channel to 7 produces the same result as setting it to 9. I have tried rebooting both router and laptop in between changes, to no avail. Meanwhile my Android phone has no issue connecting to the WLAN in any of these circumstances. Only when I set the channel selection back to Auto, the router chooses channel 9 and the laptop happily connects to it.

Any help would be appreciated.
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[ubuntu] Can't get a Wifi connection, even after Ubuntu reinstall.

April 8, 2016, 10:53 am
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I couldn't get my Ubuntu PC to recognize my library's Wifi connection yesterday. (My smartphone Wifi worked just fine there).
Then I came home, and I couldn't get my PC to recognize my home Wifi either.

I didn't know how to fix this, so I just reinstalled Ubuntu... but it still won't pickup my Wifi connection. (My ethernet connection is working just fine. So is my smartphone's Wifi connection).
(I performed the reinstall using a USB boot stick).

Any idea how to fix this? My PC is about six months old -- certainly doesn't seem like something would have broken.
(My PC is an HP Stream 13.3" laptop).

Edit: I don't think Ubuntu is recognizing my PC's wireless capabilities at all. When I typed "ls /sys/class/net" into the terminal, the only result that displayed was "eth0 lo". Please tell me there's a solution for this...
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