Tommy Brunn's questions -ubuntu

Tommy Brunn

Asked: 2015-01-05 13:54:28 +0800 CST

Get unique device ID in QML

3

I need to get a unique ID for the device. I originally thought I'd use the device's imei, but that doesn't seem to return anything:

import QtSystemInfo 5.0

DeviceInfo {
    id: device
}

Component.onCompleted {
    console.log(device.imei(0)) // Returns nothing
}

That may or may not be a bug: https://bugs.launchpad.net/ubuntu/+source/qtsystems-opensource-src/+bug/1197542 but since there haven't been any updates for a year, I'm hoping that maybe I can use some other piece of information.

So, does anyone know how I can get a unique ID for the device? It has to be persistent, but it can be totally meaningless other than as an identifier.

Tommy Brunn

Asked: 2015-01-01 03:43:42 +0800 CST

Replace secret key placeholder at build time

0

I'm developing an Ubuntu touch app in QML, and would like to keep an API key reasonably secret (at least I don't want to have to commit it into the VCS). I see that you can define environment variables in Projects -> Build & Run -> Build Environment, so my question is, how can I add a placeholder value in my QML that is then replaced by an environment variable at build time? Or is there a better way to do it?

Tommy Brunn

Asked: 2014-06-07 00:31:41 +0800 CST

Intermittent wired network issues in 14.04

1

Since yesterday, my wired network connection has been dropping for a couple of seconds every 30 seconds or so. To my knowledge, I had not made any changes to my network.

Output of ifconfig -a:

➜  ~  ifconfig -a
eth0      Link encap:Ethernet  HWaddr 6c:f0:49:b9:b1:7f  
          inet addr:192.168.0.16  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::6ef0:49ff:feb9:b17f/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:11597 errors:0 dropped:0 overruns:0 frame:0
          TX packets:9783 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:10101682 (10.1 MB)  TX bytes:1215142 (1.2 MB)
          Interrupt:48 Base address:0x8000 

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:96691 errors:0 dropped:0 overruns:0 frame:0
          TX packets:96691 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:13594355 (13.5 MB)  TX bytes:13594355 (13.5 MB)

lspci |grep Ethernet:

04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 03)

Pinging my router:

➜  ~  ping 192.168.0.1
PING 192.168.0.1 (192.168.0.1) 56(84) bytes of data.
64 bytes from 192.168.0.1: icmp_seq=1 ttl=64 time=0.435 ms
64 bytes from 192.168.0.1: icmp_seq=2 ttl=64 time=0.571 ms
ping: sendmsg: Network is unreachable
ping: sendmsg: Network is unreachable
ping: sendmsg: Network is unreachable
ping: sendmsg: Network is unreachable
ping: sendmsg: Network is unreachable
64 bytes from 192.168.0.1: icmp_seq=8 ttl=64 time=1.03 ms

And the output of route:

➜  ~  route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         192.168.0.1     0.0.0.0         UG    0      0        0 eth0
192.168.0.0     *               255.255.255.0   U     1      0        0 eth0

Some messages from /var/logs/syslog:

➜  ~  tail -f /var/log/syslog 
Jun  6 10:37:34 lolbox dhclient: RCV: Advertise message on eth0 from fe80::120d:7fff:fe97:9d54.
Jun  6 10:37:34 lolbox dhclient: IA_NA status code NoAddrsAvail.
Jun  6 10:37:37 lolbox dnsmasq[1138]: Maximum number of concurrent DNS queries reached (max: 150)
Jun  6 10:37:37 lolbox dnsmasq[1362]: Maximum number of concurrent DNS queries reached (max: 150)
Jun  6 10:37:39 lolbox dhclient: XMT: Solicit on eth0, interval 8660ms.
Jun  6 10:37:39 lolbox dhclient: RCV: Advertise message on eth0 from fe80::120d:7fff:fe97:9d54.
Jun  6 10:37:39 lolbox dhclient: IA_NA status code NoAddrsAvail.
Jun  6 10:37:47 lolbox dhclient: XMT: Solicit on eth0, interval 16820ms.
Jun  6 10:37:47 lolbox dhclient: RCV: Advertise message on eth0 from fe80::120d:7fff:fe97:9d54.
Jun  6 10:37:47 lolbox dhclient: IA_NA status code NoAddrsAvail.
Jun  6 10:38:04 lolbox dhclient: XMT: Solicit on eth0, interval 34410ms.
Jun  6 10:38:04 lolbox dhclient: RCV: Advertise message on eth0 from fe80::120d:7fff:fe97:9d54.
Jun  6 10:38:04 lolbox dhclient: IA_NA status code NoAddrsAvail.
Jun  6 10:38:16 lolbox NetworkManager[862]: <warn> (eth0): DHCPv6 request timed out.
Jun  6 10:38:16 lolbox NetworkManager[862]: <info> (eth0): canceled DHCP transaction, DHCP client pid 13045
Jun  6 10:38:16 lolbox NetworkManager[862]: <info> Activation (eth0) Stage 4 of 5 (IPv6 Configure Timeout) scheduled...
Jun  6 10:38:16 lolbox NetworkManager[862]: <info> Activation (eth0) Stage 4 of 5 (IPv6 Configure Timeout) started...
Jun  6 10:38:16 lolbox NetworkManager[862]: <info> (eth0): device state change: activated -> failed (reason 'ip-config-unavailable') [100 120 5]
Jun  6 10:38:16 lolbox NetworkManager[862]: <info> NetworkManager state is now DISCONNECTED
Jun  6 10:38:16 lolbox NetworkManager[862]: <warn> Activation (eth0) failed for connection 'Wired connection 1'
Jun  6 10:38:16 lolbox NetworkManager[862]: <info> Activation (eth0) Stage 4 of 5 (IPv6 Configure Timeout) complete.
Jun  6 10:38:16 lolbox NetworkManager[862]: <info> (eth0): device state change: failed -> disconnected (reason 'none') [120 30 0]
Jun  6 10:38:16 lolbox NetworkManager[862]: <info> (eth0): deactivating device (reason 'none') [0]
Jun  6 10:37:34 lolbox whoopsie[1133]: online
Jun  6 10:38:16 lolbox whoopsie[1133]: offline
Jun  6 10:38:16 lolbox dbus[485]: [system] Activating service name='org.freedesktop.nm_dispatcher' (using servicehelper)
Jun  6 10:38:16 lolbox dbus[485]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
Jun  6 10:38:16 lolbox NetworkManager[862]: <info> (eth0): canceled DHCP transaction, DHCP client pid 13044
Jun  6 10:38:16 lolbox NetworkManager[862]: <warn> DNS: plugin dnsmasq update failed
Jun  6 10:38:16 lolbox NetworkManager[862]: <info> Removing DNS information from /sbin/resolvconf
Jun  6 10:38:16 lolbox avahi-daemon[619]: Withdrawing address record for fe80::6ef0:49ff:feb9:b17f on eth0.
Jun  6 10:38:16 lolbox avahi-daemon[619]: Leaving mDNS multicast group on interface eth0.IPv6 with address fe80::6ef0:49ff:feb9:b17f.
Jun  6 10:38:16 lolbox avahi-daemon[619]: Interface eth0.IPv6 no longer relevant for mDNS.
Jun  6 10:38:16 lolbox avahi-daemon[619]: Withdrawing address record for 192.168.0.16 on eth0.
Jun  6 10:38:16 lolbox avahi-daemon[619]: Leaving mDNS multicast group on interface eth0.IPv4 with address 192.168.0.16.
Jun  6 10:38:16 lolbox avahi-daemon[619]: Interface eth0.IPv4 no longer relevant for mDNS.
Jun  6 10:38:16 lolbox dnsmasq[1362]: setting upstream servers from DBus
Jun  6 10:38:17 lolbox avahi-daemon[619]: Joining mDNS multicast group on interface eth0.IPv6 with address fe80::6ef0:49ff:feb9:b17f.
Jun  6 10:38:17 lolbox avahi-daemon[619]: New relevant interface eth0.IPv6 for mDNS.
Jun  6 10:38:17 lolbox avahi-daemon[619]: Registering new address record for fe80::6ef0:49ff:feb9:b17f on eth0.*.
Jun  6 10:38:18 lolbox dnsmasq[1138]: no servers found in /var/run/dnsmasq/resolv.conf, will retry
Jun  6 10:38:18 lolbox NetworkManager[862]: <info> Auto-activating connection 'Wired connection 1'.
Jun  6 10:38:18 lolbox NetworkManager[862]: <info> Activation (eth0) starting connection 'Wired connection 1'
Jun  6 10:38:18 lolbox NetworkManager[862]: <info> (eth0): device state change: disconnected -> prepare (reason 'none') [30 40 0]
Jun  6 10:38:18 lolbox NetworkManager[862]: <info> NetworkManager state is now CONNECTING
Jun  6 10:38:18 lolbox NetworkManager[862]: <info> Activation (eth0) Stage 1 of 5 (Device Prepare) scheduled...
Jun  6 10:38:18 lolbox NetworkManager[862]: <info> Activation (eth0) Stage 1 of 5 (Device Prepare) started...
Jun  6 10:38:18 lolbox NetworkManager[862]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) scheduled...
Jun  6 10:38:18 lolbox NetworkManager[862]: <info> Activation (eth0) Stage 1 of 5 (Device Prepare) complete.
Jun  6 10:38:18 lolbox NetworkManager[862]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) starting...
Jun  6 10:38:18 lolbox NetworkManager[862]: <info> (eth0): device state change: prepare -> config (reason 'none') [40 50 0]
Jun  6 10:38:18 lolbox NetworkManager[862]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) successful.
Jun  6 10:38:18 lolbox NetworkManager[862]: <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) scheduled.
Jun  6 10:38:18 lolbox NetworkManager[862]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) complete.
Jun  6 10:38:18 lolbox NetworkManager[862]: <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) started...
Jun  6 10:38:18 lolbox NetworkManager[862]: <info> (eth0): device state change: config -> ip-config (reason 'none') [50 70 0]
Jun  6 10:38:18 lolbox NetworkManager[862]: <info> Activation (eth0) Beginning DHCPv4 transaction (timeout in 45 seconds)
Jun  6 10:38:18 lolbox NetworkManager[862]: <info> dhclient started with pid 13160
Jun  6 10:38:18 lolbox NetworkManager[862]: <info> Activation (eth0) Beginning DHCPv6 transaction (timeout in 45 seconds)
Jun  6 10:38:18 lolbox NetworkManager[862]: <info> dhclient started with pid 13161
Jun  6 10:38:18 lolbox NetworkManager[862]: <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) complete.
Jun  6 10:38:18 lolbox avahi-daemon[619]: Withdrawing address record for fe80::6ef0:49ff:feb9:b17f on eth0.
Jun  6 10:38:18 lolbox avahi-daemon[619]: Leaving mDNS multicast group on interface eth0.IPv6 with address fe80::6ef0:49ff:feb9:b17f.
Jun  6 10:38:18 lolbox avahi-daemon[619]: Interface eth0.IPv6 no longer relevant for mDNS.
Jun  6 10:38:18 lolbox dhclient: Internet Systems Consortium DHCP Client 4.2.4
Jun  6 10:38:18 lolbox dhclient: Copyright 2004-2012 Internet Systems Consortium.
Jun  6 10:38:18 lolbox dhclient: All rights reserved.
Jun  6 10:38:18 lolbox dhclient: For info, please visit https://www.isc.org/software/dhcp/
Jun  6 10:38:18 lolbox dhclient: 
Jun  6 10:38:19 lolbox dhclient: Internet Systems Consortium DHCP Client 4.2.4
Jun  6 10:38:19 lolbox dhclient: Copyright 2004-2012 Internet Systems Consortium.
Jun  6 10:38:19 lolbox dhclient: All rights reserved.
Jun  6 10:38:19 lolbox dhclient: For info, please visit https://www.isc.org/software/dhcp/
Jun  6 10:38:19 lolbox dhclient: 
Jun  6 10:38:19 lolbox NetworkManager[862]: <info> (eth0): DHCPv4 state changed nbi -> preinit
Jun  6 10:38:19 lolbox dhclient: Bound to *:546
Jun  6 10:38:19 lolbox dhclient: Listening on Socket/eth0
Jun  6 10:38:19 lolbox dhclient: Sending on   Socket/eth0
Jun  6 10:38:19 lolbox NetworkManager[862]: <info> (eth0): DHCPv6 state changed nbi -> preinit6
Jun  6 10:38:19 lolbox dhclient: Listening on LPF/eth0/6c:f0:49:b9:b1:7f
Jun  6 10:38:19 lolbox dhclient: Sending on   LPF/eth0/6c:f0:49:b9:b1:7f
Jun  6 10:38:19 lolbox dhclient: Sending on   Socket/fallback
Jun  6 10:38:19 lolbox dhclient: DHCPREQUEST of 192.168.0.16 on eth0 to 255.255.255.255 port 67 (xid=0x3fc9376d)
Jun  6 10:38:19 lolbox dhclient: XMT: Solicit on eth0, interval 1020ms.
Jun  6 10:38:19 lolbox dhclient: send_packet6: Cannot assign requested address
Jun  6 10:38:19 lolbox dhclient: dhc6: send_packet6() sent -1 of 77 bytes
Jun  6 10:38:20 lolbox dhclient: DHCPACK of 192.168.0.16 from 192.168.0.1
Jun  6 10:38:20 lolbox dhclient: bound to 192.168.0.16 -- renewal in 41481 seconds.
Jun  6 10:38:20 lolbox NetworkManager[862]: <info> (eth0): DHCPv4 state changed preinit -> reboot
Jun  6 10:38:20 lolbox NetworkManager[862]: <info>   address 192.168.0.16
Jun  6 10:38:20 lolbox NetworkManager[862]: <info>   prefix 24 (255.255.255.0)
Jun  6 10:38:20 lolbox NetworkManager[862]: <info>   gateway 192.168.0.1
Jun  6 10:38:20 lolbox NetworkManager[862]: <info>   nameserver '83.255.245.11'
Jun  6 10:38:20 lolbox NetworkManager[862]: <info>   nameserver '193.150.193.150'
Jun  6 10:38:20 lolbox NetworkManager[862]: <info> Activation (eth0) Stage 5 of 5 (IPv4 Configure Commit) scheduled...
Jun  6 10:38:20 lolbox NetworkManager[862]: <info> Activation (eth0) Stage 5 of 5 (IPv4 Commit) started...
Jun  6 10:38:20 lolbox avahi-daemon[619]: Joining mDNS multicast group on interface eth0.IPv4 with address 192.168.0.16.
Jun  6 10:38:20 lolbox avahi-daemon[619]: New relevant interface eth0.IPv4 for mDNS.
Jun  6 10:38:20 lolbox avahi-daemon[619]: Registering new address record for 192.168.0.16 on eth0.IPv4.
Jun  6 10:38:20 lolbox dhclient: XMT: Solicit on eth0, interval 2110ms.
Jun  6 10:38:20 lolbox dhclient: send_packet6: Cannot assign requested address
Jun  6 10:38:20 lolbox dhclient: dhc6: send_packet6() sent -1 of 77 bytes
Jun  6 10:38:20 lolbox avahi-daemon[619]: Joining mDNS multicast group on interface eth0.IPv6 with address fe80::6ef0:49ff:feb9:b17f.
Jun  6 10:38:20 lolbox avahi-daemon[619]: New relevant interface eth0.IPv6 for mDNS.
Jun  6 10:38:20 lolbox avahi-daemon[619]: Registering new address record for fe80::6ef0:49ff:feb9:b17f on eth0.*.
Jun  6 10:38:21 lolbox NetworkManager[862]: <info> (eth0): device state change: ip-config -> secondaries (reason 'none') [70 90 0]
Jun  6 10:38:21 lolbox NetworkManager[862]: <info> Activation (eth0) Stage 5 of 5 (IPv4 Commit) complete.
Jun  6 10:38:21 lolbox NetworkManager[862]: <info> (eth0): device state change: secondaries -> activated (reason 'none') [90 100 0]
Jun  6 10:38:21 lolbox NetworkManager[862]: <info> NetworkManager state is now CONNECTED_GLOBAL
Jun  6 10:38:21 lolbox NetworkManager[862]: <info> Policy set 'Wired connection 1' (eth0) as default for IPv4 routing and DNS.
Jun  6 10:38:21 lolbox NetworkManager[862]: <info> Writing DNS information to /sbin/resolvconf
Jun  6 10:38:21 lolbox dnsmasq[1362]: setting upstream servers from DBus
Jun  6 10:38:21 lolbox dnsmasq[1362]: using nameserver 127.0.0.1#53
Jun  6 10:38:21 lolbox dnsmasq[1362]: using nameserver 193.150.193.150#53
Jun  6 10:38:21 lolbox dnsmasq[1362]: using nameserver 83.255.245.11#53
Jun  6 10:38:21 lolbox NetworkManager[862]: <info> Activation (eth0) successful, device activated.
Jun  6 10:38:21 lolbox whoopsie[1133]: message repeated 2 times: [ offline]
Jun  6 10:38:21 lolbox whoopsie[1133]: online
Jun  6 10:38:21 lolbox ntpdate[13217]: Can't find host ntp.ubuntu.com: Name or service not known (-2)
Jun  6 10:38:21 lolbox ntpdate[13217]: no servers can be used, exiting
Jun  6 10:38:22 lolbox dnsmasq[1138]: reading /var/run/dnsmasq/resolv.conf
Jun  6 10:38:22 lolbox dnsmasq[1138]: using nameserver 127.0.1.1#53
Jun  6 10:38:22 lolbox dhclient: XMT: Solicit on eth0, interval 4080ms.
Jun  6 10:38:22 lolbox dhclient: RCV: Advertise message on eth0 from fe80::120d:7fff:fe97:9d54.
Jun  6 10:38:22 lolbox dhclient: IA_NA status code NoAddrsAvail.
Jun  6 10:38:26 lolbox dhclient: XMT: Solicit on eth0, interval 8450ms.
Jun  6 10:38:26 lolbox dhclient: RCV: Advertise message on eth0 from fe80::120d:7fff:fe97:9d54.
Jun  6 10:38:26 lolbox dhclient: IA_NA status code NoAddrsAvail.
Jun  6 10:38:35 lolbox dhclient: XMT: Solicit on eth0, interval 16630ms.
Jun  6 10:38:35 lolbox dhclient: RCV: Advertise message on eth0 from fe80::120d:7fff:fe97:9d54.
Jun  6 10:38:35 lolbox dhclient: IA_NA status code NoAddrsAvail.
Jun  6 10:38:51 lolbox dhclient: XMT: Solicit on eth0, interval 34860ms.
Jun  6 10:38:51 lolbox dhclient: RCV: Advertise message on eth0 from fe80::120d:7fff:fe97:9d54.
Jun  6 10:38:51 lolbox dhclient: IA_NA status code NoAddrsAvail.
Jun  6 10:38:58 lolbox dnsmasq[1138]: Maximum number of concurrent DNS queries reached (max: 150)
Jun  6 10:38:58 lolbox dnsmasq[1362]: Maximum number of concurrent DNS queries reached (max: 150)
Jun  6 10:39:04 lolbox NetworkManager[862]: <warn> (eth0): DHCPv6 request timed out.
Jun  6 10:39:04 lolbox NetworkManager[862]: <info> (eth0): canceled DHCP transaction, DHCP client pid 13161
Jun  6 10:39:04 lolbox NetworkManager[862]: <info> Activation (eth0) Stage 4 of 5 (IPv6 Configure Timeout) scheduled...
Jun  6 10:39:04 lolbox NetworkManager[862]: <info> Activation (eth0) Stage 4 of 5 (IPv6 Configure Timeout) started...
Jun  6 10:39:04 lolbox NetworkManager[862]: <info> (eth0): device state change: activated -> failed (reason 'ip-config-unavailable') [100 120 5]
Jun  6 10:39:04 lolbox NetworkManager[862]: <info> NetworkManager state is now DISCONNECTED
Jun  6 10:39:04 lolbox NetworkManager[862]: <warn> Activation (eth0) failed for connection 'Wired connection 1'
Jun  6 10:38:22 lolbox whoopsie[1133]: online
Jun  6 10:39:04 lolbox whoopsie[1133]: offline
Jun  6 10:39:04 lolbox NetworkManager[862]: <info> Activation (eth0) Stage 4 of 5 (IPv6 Configure Timeout) complete.
Jun  6 10:39:04 lolbox dbus[485]: [system] Activating service name='org.freedesktop.nm_dispatcher' (using servicehelper)
Jun  6 10:39:04 lolbox NetworkManager[862]: <info> (eth0): device state change: failed -> disconnected (reason 'none') [120 30 0]
Jun  6 10:39:04 lolbox NetworkManager[862]: <info> (eth0): deactivating device (reason 'none') [0]
Jun  6 10:39:04 lolbox dbus[485]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
Jun  6 10:39:04 lolbox NetworkManager[862]: <info> (eth0): canceled DHCP transaction, DHCP client pid 13160
Jun  6 10:39:04 lolbox avahi-daemon[619]: Withdrawing address record for fe80::6ef0:49ff:feb9:b17f on eth0.
Jun  6 10:39:04 lolbox avahi-daemon[619]: Leaving mDNS multicast group on interface eth0.IPv6 with address fe80::6ef0:49ff:feb9:b17f.
Jun  6 10:39:04 lolbox avahi-daemon[619]: Interface eth0.IPv6 no longer relevant for mDNS.
Jun  6 10:39:04 lolbox avahi-daemon[619]: Withdrawing address record for 192.168.0.16 on eth0.
Jun  6 10:39:04 lolbox avahi-daemon[619]: Leaving mDNS multicast group on interface eth0.IPv4 with address 192.168.0.16.
Jun  6 10:39:04 lolbox avahi-daemon[619]: Interface eth0.IPv4 no longer relevant for mDNS.
Jun  6 10:39:04 lolbox NetworkManager[862]: <warn> DNS: plugin dnsmasq update failed
Jun  6 10:39:04 lolbox NetworkManager[862]: <info> Removing DNS information from /sbin/resolvconf
Jun  6 10:39:04 lolbox dnsmasq[1362]: setting upstream servers from DBus
Jun  6 10:39:05 lolbox avahi-daemon[619]: Joining mDNS multicast group on interface eth0.IPv6 with address fe80::6ef0:49ff:feb9:b17f.
Jun  6 10:39:05 lolbox avahi-daemon[619]: New relevant interface eth0.IPv6 for mDNS.
Jun  6 10:39:05 lolbox avahi-daemon[619]: Registering new address record for fe80::6ef0:49ff:feb9:b17f on eth0.*.
Jun  6 10:39:06 lolbox dnsmasq[1138]: no servers found in /var/run/dnsmasq/resolv.conf, will retry
Jun  6 10:39:07 lolbox NetworkManager[862]: <info> Auto-activating connection 'Wired connection 1'.
Jun  6 10:39:07 lolbox NetworkManager[862]: <info> Activation (eth0) starting connection 'Wired connection 1'
Jun  6 10:39:07 lolbox NetworkManager[862]: <info> (eth0): device state change: disconnected -> prepare (reason 'none') [30 40 0]
Jun  6 10:39:07 lolbox NetworkManager[862]: <info> NetworkManager state is now CONNECTING
Jun  6 10:39:07 lolbox NetworkManager[862]: <info> Activation (eth0) Stage 1 of 5 (Device Prepare) scheduled...
Jun  6 10:39:07 lolbox NetworkManager[862]: <info> Activation (eth0) Stage 1 of 5 (Device Prepare) started...
Jun  6 10:39:07 lolbox NetworkManager[862]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) scheduled...
Jun  6 10:39:07 lolbox NetworkManager[862]: <info> Activation (eth0) Stage 1 of 5 (Device Prepare) complete.
Jun  6 10:39:07 lolbox NetworkManager[862]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) starting...
Jun  6 10:39:07 lolbox NetworkManager[862]: <info> (eth0): device state change: prepare -> config (reason 'none') [40 50 0]
Jun  6 10:39:07 lolbox NetworkManager[862]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) successful.
Jun  6 10:39:07 lolbox NetworkManager[862]: <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) scheduled.
Jun  6 10:39:07 lolbox NetworkManager[862]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) complete.
Jun  6 10:39:07 lolbox NetworkManager[862]: <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) started...
Jun  6 10:39:07 lolbox NetworkManager[862]: <info> (eth0): device state change: config -> ip-config (reason 'none') [50 70 0]
Jun  6 10:39:07 lolbox NetworkManager[862]: <info> Activation (eth0) Beginning DHCPv4 transaction (timeout in 45 seconds)
Jun  6 10:39:07 lolbox NetworkManager[862]: <info> dhclient started with pid 13270
Jun  6 10:39:07 lolbox NetworkManager[862]: <info> Activation (eth0) Beginning DHCPv6 transaction (timeout in 45 seconds)
Jun  6 10:39:07 lolbox NetworkManager[862]: <info> dhclient started with pid 13271
Jun  6 10:39:07 lolbox NetworkManager[862]: <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) complete.
Jun  6 10:39:07 lolbox avahi-daemon[619]: Withdrawing address record for fe80::6ef0:49ff:feb9:b17f on eth0.
Jun  6 10:39:07 lolbox avahi-daemon[619]: Leaving mDNS multicast group on interface eth0.IPv6 with address fe80::6ef0:49ff:feb9:b17f.
Jun  6 10:39:07 lolbox avahi-daemon[619]: Interface eth0.IPv6 no longer relevant for mDNS.
Jun  6 10:39:07 lolbox dhclient: Internet Systems Consortium DHCP Client 4.2.4
Jun  6 10:39:07 lolbox dhclient: Copyright 2004-2012 Internet Systems Consortium.
Jun  6 10:39:07 lolbox dhclient: All rights reserved.
Jun  6 10:39:07 lolbox dhclient: For info, please visit https://www.isc.org/software/dhcp/
Jun  6 10:39:07 lolbox dhclient: 
Jun  6 10:39:08 lolbox dhclient: Internet Systems Consortium DHCP Client 4.2.4
Jun  6 10:39:08 lolbox dhclient: Copyright 2004-2012 Internet Systems Consortium.
Jun  6 10:39:08 lolbox dhclient: All rights reserved.
Jun  6 10:39:08 lolbox dhclient: For info, please visit https://www.isc.org/software/dhcp/
Jun  6 10:39:08 lolbox dhclient: 
Jun  6 10:39:08 lolbox dhclient: Bound to *:546
Jun  6 10:39:08 lolbox dhclient: Listening on Socket/eth0
Jun  6 10:39:08 lolbox dhclient: Sending on   Socket/eth0
Jun  6 10:39:08 lolbox kernel: [ 1446.098590] type=1400 audit(1402043948.002:75): apparmor="DENIED" operation="signal" profile="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=13273 comm="nm-dhcp-client." requested_mask="send" denied_mask="send" signal=term peer="/sbin/dhclient"
Jun  6 10:39:08 lolbox kernel: [ 1446.098599] type=1400 audit(1402043948.002:76): apparmor="DENIED" operation="signal" profile="/sbin/dhclient" pid=13273 comm="nm-dhcp-client." requested_mask="receive" denied_mask="receive" signal=term peer="/usr/lib/NetworkManager/nm-dhcp-client.action"
Jun  6 10:39:08 lolbox NetworkManager[862]: <info> (eth0): DHCPv4 state changed nbi -> preinit
Jun  6 10:39:08 lolbox dhclient: Listening on LPF/eth0/6c:f0:49:b9:b1:7f
Jun  6 10:39:08 lolbox dhclient: Sending on   LPF/eth0/6c:f0:49:b9:b1:7f
Jun  6 10:39:08 lolbox dhclient: Sending on   Socket/fallback
Jun  6 10:39:08 lolbox dhclient: DHCPREQUEST of 192.168.0.16 on eth0 to 255.255.255.255 port 67 (xid=0x3e0183b9)
Jun  6 10:39:08 lolbox dhclient: XMT: Solicit on eth0, interval 1050ms.
Jun  6 10:39:08 lolbox dhclient: send_packet6: Cannot assign requested address
Jun  6 10:39:08 lolbox dhclient: dhc6: send_packet6() sent -1 of 77 bytes
Jun  6 10:39:09 lolbox dhclient: DHCPACK of 192.168.0.16 from 192.168.0.1
Jun  6 10:39:09 lolbox dhclient: bound to 192.168.0.16 -- renewal in 35498 seconds.
Jun  6 10:39:09 lolbox NetworkManager[862]: <info> (eth0): DHCPv4 state changed preinit -> reboot
Jun  6 10:39:09 lolbox NetworkManager[862]: <info>   address 192.168.0.16
Jun  6 10:39:09 lolbox NetworkManager[862]: <info>   prefix 24 (255.255.255.0)
Jun  6 10:39:09 lolbox NetworkManager[862]: <info>   gateway 192.168.0.1
Jun  6 10:39:09 lolbox NetworkManager[862]: <info>   nameserver '83.255.245.11'
Jun  6 10:39:09 lolbox NetworkManager[862]: <info>   nameserver '193.150.193.150'
Jun  6 10:39:09 lolbox NetworkManager[862]: <info> Activation (eth0) Stage 5 of 5 (IPv4 Configure Commit) scheduled...
Jun  6 10:39:09 lolbox NetworkManager[862]: <info> Activation (eth0) Stage 5 of 5 (IPv4 Commit) started...
Jun  6 10:39:09 lolbox avahi-daemon[619]: Joining mDNS multicast group on interface eth0.IPv4 with address 192.168.0.16.
Jun  6 10:39:09 lolbox avahi-daemon[619]: New relevant interface eth0.IPv4 for mDNS.
Jun  6 10:39:09 lolbox avahi-daemon[619]: Registering new address record for 192.168.0.16 on eth0.IPv4.
Jun  6 10:39:09 lolbox avahi-daemon[619]: Joining mDNS multicast group on interface eth0.IPv6 with address fe80::6ef0:49ff:feb9:b17f.
Jun  6 10:39:09 lolbox avahi-daemon[619]: New relevant interface eth0.IPv6 for mDNS.
Jun  6 10:39:09 lolbox avahi-daemon[619]: Registering new address record for fe80::6ef0:49ff:feb9:b17f on eth0.*.
Jun  6 10:39:10 lolbox dhclient: XMT: Solicit on eth0, interval 2180ms.
Jun  6 10:39:10 lolbox dhclient: RCV: Advertise message on eth0 from fe80::120d:7fff:fe97:9d54.
Jun  6 10:39:10 lolbox dhclient: IA_NA status code NoAddrsAvail.
Jun  6 10:39:10 lolbox NetworkManager[862]: <info> (eth0): device state change: ip-config -> secondaries (reason 'none') [70 90 0]
Jun  6 10:39:10 lolbox NetworkManager[862]: <info> Activation (eth0) Stage 5 of 5 (IPv4 Commit) complete.
Jun  6 10:39:10 lolbox NetworkManager[862]: <info> (eth0): device state change: secondaries -> activated (reason 'none') [90 100 0]
Jun  6 10:39:10 lolbox NetworkManager[862]: <info> NetworkManager state is now CONNECTED_GLOBAL
Jun  6 10:39:10 lolbox NetworkManager[862]: <info> Policy set 'Wired connection 1' (eth0) as default for IPv4 routing and DNS.
Jun  6 10:39:10 lolbox NetworkManager[862]: <info> Writing DNS information to /sbin/resolvconf
Jun  6 10:39:10 lolbox dnsmasq[1362]: setting upstream servers from DBus
Jun  6 10:39:10 lolbox dnsmasq[1362]: using nameserver 127.0.0.1#53
Jun  6 10:39:10 lolbox dnsmasq[1362]: using nameserver 193.150.193.150#53
Jun  6 10:39:10 lolbox dnsmasq[1362]: using nameserver 83.255.245.11#53
Jun  6 10:39:10 lolbox NetworkManager[862]: <info> Activation (eth0) successful, device activated.
Jun  6 10:39:10 lolbox whoopsie[1133]: message repeated 2 times: [ offline]
Jun  6 10:39:10 lolbox whoopsie[1133]: online
Jun  6 10:39:10 lolbox ntpdate[13339]: Can't find host ntp.ubuntu.com: Name or service not known (-2)
Jun  6 10:39:10 lolbox ntpdate[13339]: no servers can be used, exiting
Jun  6 10:39:11 lolbox dnsmasq[1138]: reading /var/run/dnsmasq/resolv.conf
Jun  6 10:39:11 lolbox dnsmasq[1138]: using nameserver 127.0.1.1#53
Jun  6 10:39:12 lolbox dhclient: XMT: Solicit on eth0, interval 4350ms.
Jun  6 10:39:12 lolbox dhclient: RCV: Advertise message on eth0 from fe80::120d:7fff:fe97:9d54.
Jun  6 10:39:12 lolbox dhclient: IA_NA status code NoAddrsAvail.
Jun  6 10:39:16 lolbox dhclient: XMT: Solicit on eth0, interval 8740ms.
Jun  6 10:39:16 lolbox dhclient: RCV: Advertise message on eth0 from fe80::120d:7fff:fe97:9d54.
Jun  6 10:39:16 lolbox dhclient: IA_NA status code NoAddrsAvail.
Jun  6 10:39:17 lolbox dnsmasq[1138]: Maximum number of concurrent DNS queries reached (max: 150)
Jun  6 10:39:17 lolbox dnsmasq[1362]: Maximum number of concurrent DNS queries reached (max: 150)
Jun  6 10:39:25 lolbox dhclient: XMT: Solicit on eth0, interval 17610ms.
Jun  6 10:39:25 lolbox dhclient: RCV: Advertise message on eth0 from fe80::120d:7fff:fe97:9d54.
Jun  6 10:39:25 lolbox dhclient: IA_NA status code NoAddrsAvail.

/etc/NetworkManager/NetworkManager.conf:

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

#no-auto-default=6C:F0:49:B9:B1:7F,

[ifupdown]
managed=false

/etc/network/interfaces:

# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback

lshw -C network:

  ➜  ~  sudo lshw -C network
    *-network               
         description: Ethernet interface
         product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
         vendor: Realtek Semiconductor Co., Ltd.
         physical id: 0
         bus info: pci@0000:04:00.0
         logical name: eth0
         version: 03
         serial: 6c:f0:49:b9:b1:7f
         size: 1Gbit/s
         capacity: 1Gbit/s
         width: 64 bits
         clock: 33MHz
         capabilities: pm msi pciexpress msix vpd bus_master cap_list rom ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
         configuration: autonegotiation=on broadcast=yes driver=r8168 driverversion=8.038.00-NAPI duplex=full latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
         resources: irq:48 ioport:de00(size=256) memory:fbeff000-fbefffff memory:fbef8000-fbefbfff memory:fbe00000-fbe1ffff

Tommy Brunn

Asked: 2014-04-19 03:37:10 +0800 CST

Network only using one DNS when connected to VPN

10

My company has a VPN that I need to connect to. In OSX, I do this by using openvpn with the following configuration:

client
dev tun
proto udp
remote <GATEWAY_ADDRESS> <PORT>
resolv-retry infinite
nobind
user nobody
group nobody
persist-key
persist-tun
ca /Users/Tommy/.openvpn/dev/ca-dev.crt
cert /Users/Tommy/.openvpn/dev/tommy.brunn-20131122-dev.crt
key /Users/Tommy/.openvpn/dev/tommy.brunn-20131122-dev.key
ns-cert-type server
tls-auth /Users/Tommy/.openvpn/dev/ta-dev.key 1
cipher BF-CBC
comp-lzo
verb 3
auth-nocache
;daemon
;writepid openvpn.pid

In Ubuntu, I've installed network-manager-openvpn and added a new VPN connection (trying to import the config file caused a crash) with the same configuration options set: Screenshots of my settings

Once I connect to the VPN, I can't resolve any domains whatsoever.

If I edit /etc/NetworkManager/NetworkManager.conf, comment out the line dns=dnsmasq and restart network-manager, I can resolve internal domains from my company, but other domains like google.com won't resolve at all. I've made sure to set my "Method" to "Automatic (VPN) addresses only" in the IPv4 and IPv6 tabs of the network manager for my VPN connection, but it doesn't seem to make any difference.

I've also tried re-enabling dnsmasq and modifying /etc/resolvconf/resolv.conf.d/base to contain nameserver 127.0.1.1, then running sudo resolveconf -u, but then no domains will resolve again.

What I would like is to be able to connect to my VPN so that domains pushed by my company's DNS server are resolved that way, and all other domains are resolved normally.

EDIT: Turns out dnsmasq wasn't actually installed, which I thought it would be by default. Nevertheless, if I install it, re-enable it in /etc/NetworkManager/NetworkManager.conf, add the local nameserver address in /etc/resolvconf/resolv.conf.d/base, restart all the services and connect to the VPN, I can resolve domains from the company DNS, but I can't resolve any other domains. So basically the same situation as when I disabled dnsmasq entirely.

EDIT: Contents of /etc/dnsmasq.conf: http://paste.ubuntu.com/7297231/

Tommy Brunn

Asked: 2012-11-18 12:01:35 +0800 CST

Streaming desktop with avconv - severe sound issues

6

I'm trying to do some live streaming in Ubuntu 12.10, but I'm having some problems with audio. More specifically, the quality is complete garbage and it's at least 10 seconds out of sync with the video.

I'm using an excellent guide found here to set up my loopback devices so that I can combine the desktop audio with the microphone input. It seems to work, as I'm able to stream both audio and video to Twitch.tv. But, as I said, the audio quality is terrible. The microphone audio is very, very low, but if I increase it, I get a horrible garbled sound that is absolutely unbearable. Nothing like that is present during VoIP calls or when recording sound alone with the sound recorder, so it's not an issue with the microphone itself. The entire audio stream is also delayed about 10-15 seconds compared to the video stream.

I put together an imgur album of my settings.

Here is some example output from when I'm streaming:

avconv version 0.8.4-6:0.8.4-0ubuntu0.12.10.1, Copyright (c) 2000-2012 the Libav developers
  built on Nov  6 2012 16:51:11 with gcc 4.7.2
[x11grab @ 0x162fd80] device: :0.0+570,262 -> display: :0.0 x: 570 y: 262 width: 1280 height: 720
[x11grab @ 0x162fd80] shared memory extension  found
[x11grab @ 0x162fd80] Estimating duration from bitrate, this may be inaccurate
Input #0, x11grab, from ':0.0+570,262':
  Duration: N/A, start: 1353181686.735113, bitrate: 884736 kb/s
    Stream #0.0: Video: rawvideo, bgra, 1280x720, 884736 kb/s, 30 tbr, 1000k tbn, 30 tbc
[alsa @ 0x163fce0] capture with some ALSA plugins, especially dsnoop, may hang.
[alsa @ 0x163fce0] Estimating duration from bitrate, this may be inaccurate
Input #1, alsa, from 'pulse':
  Duration: N/A, start: 1353181686.773841, bitrate: N/A
    Stream #1.0: Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s
Incompatible pixel format 'bgra' for codec 'libx264', auto-selecting format 'yuv420p'
[buffer @ 0x1641ec0] w:1280 h:720 pixfmt:bgra
[scale @ 0x1642480] w:1280 h:720 fmt:bgra -> w:852 h:480 fmt:yuv420p flags:0x4
[libx264 @ 0x165ae80] VBV maxrate unspecified, assuming CBR
[libx264 @ 0x165ae80] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2
[libx264 @ 0x165ae80] profile Main, level 3.1
[libx264 @ 0x165ae80] 264 - core 123 r2189 35cf912 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - http://www.videolan.org/x264.html - options: cabac=1 ref=2 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=6 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=4 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=0 b_adapt=1 b_bias=0 direct=1 weightb=0 open_gop=1 weightp=1 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=30 rc=cbr mbtree=1 bitrate=712 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=712 vbv_bufsize=512 nal_hrd=none ip_ratio=1.25 aq=1:1.00
Output #0, flv, to 'rtmp://live.justin.tv/app/live_23011330_Pt1plSRM0z5WVNJ0QmCHvTPmpUnfC4':
  Metadata:
    encoder         : Lavf53.21.0
    Stream #0.0: Video: libx264, yuv420p, 852x480, q=-1--1, 712 kb/s, 1k tbn, 30 tbc
    Stream #0.1: Audio: libmp3lame, 44100 Hz, 2 channels, s16, 712 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo -> libx264)
  Stream #1:0 -> #0:1 (pcm_s16le -> libmp3lame)
Press ctrl-c to stop encoding
frame=   17 fps=  0 q=0.0 size=       0kB time=10000000000.00 bitrate=   0.0kbitframe=   32 fps= 31 q=0.0 size=       0kB time=10000000000.00 bitrate=   0.0kbitframe=   40 fps= 23 q=29.0 size=      44kB time=0.03 bitrate=13786.2kbits/s dup=frame=   47 fps= 21 q=31.0 size=      93kB time=2.73 bitrate= 277.7kbits/s dup=0frame=   62 fps= 23 q=29.0 size=     160kB time=3.23 bitrate= 406.2kbits/s dup=0frame=   77 fps= 24 q=23.0 size=     209kB time=3.71 bitrate= 462.5kbits/s dup=0frame=   92 fps= 25 q=20.0 size=     267kB time=4.91 bitrate= 445.2kbits/s dup=0frame=  107 fps= 25 q=20.0 size=     318kB time=5.41 bitrate= 482.1kbits/s dup=0frame=  123 fps= 26 q=18.0 size=     368kB time=5.96 bitrate= 505.7kbits/s dup=0frame=  139 fps= 26 q=16.0 size=     419kB time=6.48 bitrate= 529.7kbits/s dup=0frame=  155 fps= 27 q=15.0 size=     473kB time=7.00 bitrate= 553.6kbits/s dup=0frame=  170 fps= 27 q=14.0 size=     525kB time=7.52 bitrate= 571.7kbits/s dup=0
frame=  180 fps= 25 q=-1.0 Lsize=     652kB time=7.97 bitrate= 670.0kbits/s dup=0 drop=32

//Here I stop the streaming

video:531kB audio:112kB global headers:0kB muxing overhead 1.345945%
[libx264 @ 0x165ae80] frame I:1     Avg QP:30.43  size: 39748
[libx264 @ 0x165ae80] frame P:45    Avg QP:11.37  size: 11110
[libx264 @ 0x165ae80] frame B:134   Avg QP:15.93  size:    27
[libx264 @ 0x165ae80] consecutive B-frames:  0.6%  0.0%  1.7% 97.8%
[libx264 @ 0x165ae80] mb I  I16..4:  7.3%  0.0% 92.7%
[libx264 @ 0x165ae80] mb P  I16..4:  0.1%  0.0%  0.1%  P16..4: 49.1%  1.2%  2.1%  0.0%  0.0%    skip:47.4%
[libx264 @ 0x165ae80] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  0.1%  0.0%  0.0%  direct: 0.0%  skip:99.9%  L0:42.5% L1:56.9% BI: 0.6%
[libx264 @ 0x165ae80] coded y,uvDC,uvAC intra: 82.3% 87.4% 71.9% inter: 7.1% 8.4% 7.0%
[libx264 @ 0x165ae80] i16 v,h,dc,p: 27% 29% 16% 28%
[libx264 @ 0x165ae80] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 22% 21% 14%  8%  8%  8%  7%  5%  7%
[libx264 @ 0x165ae80] i8c dc,h,v,p: 47% 22% 20% 11%
[libx264 @ 0x165ae80] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0x165ae80] ref P L0: 96.4%  3.6%
[libx264 @ 0x165ae80] kb/s:474.19
Received signal 2: terminating.

Any ideas on how I can resolve this? The video delay is perfectly acceptable, so I wouldn't think that it's a network issue that's causing the delay in the audio.

Any help would be appreciated.

EDIT: Output from top and iotop.

Tommy Brunn

Asked: 2011-05-02 03:26:37 +0800 CST

Bittorrent magnitudes slower in 11.04 than in 10.10

1

I'm running into a very strange issue related to bittorrent. Back in Maverick, I could download at about 2mbps per torrent. Now, i'll be lucky to get to 100kbps. Not only that, but any other network access slows to a crawl as soon as I start downloading something.

At first I thought it might be my router that was being overwhelmed with all the connections, but I checked my settings and saw that I had already set the global connections limit to 200, and a per torrent setting of 50. I've been able to have a much higher limit in the past, so that shouldn't be it.

Any ideas on how to troubleshoot this?

EDIT: To add to the mystery, I'm now using another computer with Natty on. I'm using the same torrents with the same bittorrent client and the same settings, and now it's working beautifully.

Tommy Brunn

Asked: 2011-04-14 03:30:53 +0800 CST

Alt+tab out of fullscreen game

23

Right now I'm running Trine, which is a game using OpenGL running in fullscreen, in Ubuntu 10.10.

What I would like to be able to do is Alt+Tab out of the game to be able to browse the web, check any IM messages, etc. while paused.

However, just Alt+Tab'ing doesn't do anything, so I have to quit the game every time I want to check something.

Is there any way that I can minimize a fullscreen game? I know I can probably run it in windowed mode, but then I would have to hide the panels when playing - since the game would otherwise be hidden underneath. Plus, that's just an ugly solution.

Tommy Brunn

Asked: 2010-09-10 09:41:47 +0800 CST

Slow wifi with D-link DWA-160 A2

4

I recently bought a USB wifi adapter for my new desktop computer. It's a D-link DWA-160 A2. From the start it didn't want to work at all, but after unplugging and then plugging it back in, it seems to work.

However, my browsing is painfully slow. NetworkManager reports the connection to be at around 78-85% signal strength, which seems perfectly acceptable.

Is there anything I can do to make it faster? I'm dual booting with Windows 7, where it seems to work fine, so I'm guessing that the problem occurs because of crappy drivers.

Tommy Brunn

Asked: 2010-09-10 03:55:26 +0800 CST

Start ssh server on boot

41

I've been doing my google-fu, but I can only find outdated guides or guides pertaining solely to the server variations of Ubuntu.

I need to set it up so that ssh server is run on boot, so I can access the computer remotely without having to first physically log in on the host computer. How would I do that? I already have ssh server set up so that I can log in and all that, but first I would have to log in on the host and run sudo /etc/init.d/ssh start

Get unique device ID in QML

Replace secret key placeholder at build time

Intermittent wired network issues in 14.04

Network only using one DNS when connected to VPN

Streaming desktop with avconv - severe sound issues

Bittorrent magnitudes slower in 11.04 than in 10.10

Alt+tab out of fullscreen game

Slow wifi with D-link DWA-160 A2

Start ssh server on boot

How to install Google Chrome

Is there a command to list all users? Also to add, delete, modify users, in the terminal?

How to delete a non-empty directory in Terminal?

How to unzip a zip file from the Terminal?

How can I copy the contents of a folder to another folder in a different directory using terminal?

How do I install a .deb file via the command line?

How do I run .sh scripts?

How do I install a .tar.gz (or .tar.bz2) file?

How to list all installed packages

Unable to lock the administration directory (/var/lib/dpkg/) is another process using it?