Every time I restart my router or for other reasons my printer changes its IP and I can't print or scan anymore. Setting up the printer is straightforward but the scanner not so much.
How can I reregister the scanner under the correct IP?
The printer/scanner is a Brother MFC-J480DW.
➜ ~ ssh -i ~/.ssh/yl-ec2.pem ubuntu@ec2-[...]ute.amazonaws.com -X
Welcome to Ubuntu 14.04.5 LTS (GNU/Linux 3.13.0-92-generic x86_64)
* Documentation: https://help.ubuntu.com/
System information as of Fri Mar 10 13:39:32 UTC 2017
System load: 0.0 Processes: 115
Usage of /: 31.7% of 7.74GB Users logged in: 0
Memory usage: 12% IP address for eth0: 172.31.12.34
Swap usage: 0%
Graph this data and manage this system at:
https://landscape.canonical.com/
Get cloud support with Ubuntu Advantage Cloud Guest:
http://www.ubuntu.com/business/services/cloud
36 packages can be updated.
17 updates are security updates.
Last login: Fri Mar 10 13:39:32 2017 from ip1f123456.dynamic.kabel-deutschland.de
ubuntu@ip-172-31-12-34:~$ sudo apt-get update
0% [Connecting to eu-central-1.ec2.archive.ubuntu.com (54.93.91.241)] [Connecti
The problem is what you see at the end of above session script. After sudo apt-get update an incomplete status line is printed and it stops there. Nothing happens.
If I press Enter the last line is printed again.
If I press Ctrl+C then I can leave this process and return to the command line where I can proceed as usual it seems - f.x. ls, cd
ubuntu@ip-172-31-12-34:~$ sudo cat /etc/apt/sources.list | grep -v '#'
deb http://eu-central-1.ec2.archive.ubuntu.com/ubuntu/ trusty main restricted
deb-src http://eu-central-1.ec2.archive.ubuntu.com/ubuntu/ trusty main restricted
deb http://eu-central-1.ec2.archive.ubuntu.com/ubuntu/ trusty-updates main restricted
deb-src http://eu-central-1.ec2.archive.ubuntu.com/ubuntu/ trusty-updates main restricted
deb http://eu-central-1.ec2.archive.ubuntu.com/ubuntu/ trusty universe
deb-src http://eu-central-1.ec2.archive.ubuntu.com/ubuntu/ trusty universe
deb http://eu-central-1.ec2.archive.ubuntu.com/ubuntu/ trusty-updates universe
deb-src http://eu-central-1.ec2.archive.ubuntu.com/ubuntu/ trusty-updates universe
deb http://eu-central-1.ec2.archive.ubuntu.com/ubuntu/ trusty multiverse
deb-src http://eu-central-1.ec2.archive.ubuntu.com/ubuntu/ trusty multiverse
deb http://eu-central-1.ec2.archive.ubuntu.com/ubuntu/ trusty-updates multiverse
deb-src http://eu-central-1.ec2.archive.ubuntu.com/ubuntu/ trusty-updates multiverse
deb http://eu-central-1.ec2.archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse
deb-src http://eu-central-1.ec2.archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse
deb http://security.ubuntu.com/ubuntu trusty-security main
deb-src http://security.ubuntu.com/ubuntu trusty-security main
deb http://security.ubuntu.com/ubuntu trusty-security universe
deb-src http://security.ubuntu.com/ubuntu trusty-security universe
> cat /etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 172.31.0.2
search eu-central-1.compute.internal
> sudo iptables -nvL
Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
Is it possible to verify which player (HTML5 or Flash) is being used to render a video in Chrome/ium even if no information providing context menu is available?
I activated disk encryption for my Ubuntu 15.10 64bit installation and get every time after entering the (correct) password the error message:
cryptsetup: unknown fstype, bad password or options?
But after few seconds (without any further interaction) this error message is replaced by the expected message:
cryptsetup: sda5_crypt set up successfully
That's it and the system is started.
Any suggestions what could be the problem? Is it merely cosmetic or serious?
A program I regularly use is based on Java and started with a shell file. I would like to add a launcher for this program/shell file to the favorites menu of my Gnome desktop on Ubuntu 15.10.
How can I do that?
I need AltGr a lot for the purpose of {,[,],},... and it is uncomfortable to only have it available for my right hand. So, I'd like to change Caps Lock into AltGr.
I'm working on an EC2 instance running Ubuntu 14.04 64bit and I want to download a file using Lynx. The file I want is downloaded from web-site that I have to authenticate on - which is why I decided to use lynx. Which happens to work for files of a size lower than approx. 1 GB. But the file I would like to download is about 8 GB. Here's what I do:
I switch onto a mounted EBS disk which happens to provide 47GB of free space:
ubuntu@ip-...:~/data$ df -h
Filesystem Size Used Avail Use% Mounted on
...
/dev/xvdf 50G 52M 47G 1% /home/ubuntu/data
The owner is my working account:
ubuntu@ip-...:~$ ls -la
total 22608
...
drwxr-xr-x 3 ubuntu ubuntu 4096 Apr 17 13:37 data
...
My current working directory is the root folder of that disk:
ubuntu@ip-...:~/data$ echo $PWD
/home/ubuntu/data
So, I fire up lynx, authenticate on the web-site and initiate the download - which seems to work fine - as I can follow the progress. But as soon as Lynx hits about more or less 1 GB of downloaded data I get an error message and lynx crashes:
Alert!: HTFWriter_write: FileWriter: No space left on device
Any ideas how to resolve or further troubleshoot this issue?
Sometimes I need to kill a process and for that purpose I enter htop, search (/) for some string and then intend to kill the associated process.
The problem is that usually the processes are in motion (due to new processes being added and attributes changing) - so by the time I pressed F9 and went on with "killing" the process the selected process is already a different one.
Is there a way to handle this?
The reason why I use htop is of course b/c I sometimes have to guess which is the right process to get rid of and just a string is not sufficient for identification.
Just recently I switched from Unity to GNOME and I must say I (mostly) very much enjoy it. For example the Activities menu is pretty fancy - I reach it usually by using the Super-Key: The activities menu will show the various open windows.
Now my question is - how can I select a specific window using a keyboard shortcut instead of having to choose one with the mouse?
> gnome-shell --version
GNOME Shell 3.10.4
My question is asking regarding a specific observation that I would like to understand.
I just tried to install the package rJava in R and failed even though I prefaced the installation as suggested by the manual with:
sudo R CMD javareconf
Then I came across this comment:
Using sudo and running as root are not exactly the same thing. – Jon7
Desparate as I was I tried it:
sudo su
R CMD javareconf
And to my surprise I suddenly could install that package.
Sorry for the lenghty introduction but I wanted to give you a context to prevent answers like here. The question does not aim at specifically the described observation - rather at those "things" in general on Ubuntu.
My question is: How could this be possible? What is the difference between sudo X and runnding X as root?
[Ubuntu 14.04 64bit]
After switching between Intel / NVIDIA graphics and the different NVIDIA drivers I am now suddenly stuck with the Intel GPU. It used to be no problem at all switching between the two - I cannot say for sure what is suddenly causing the issue. I think the last thing I did was switching to the "X.Org X server" driver - then something broke. The switching was part of me trying to troubleshoot issues with setting up a secondary screen.
Every time I try to switch to NVIDIA I get this very expressive error message and then it switches back to Intel :/
I could use some assistance with troubleshooting or suggestions on what to try.
So far I (un/re)installed the various packages "nvidia-settings" / "nvidia-current" / "nvidia-current-updates" / "nvidia-331" / "nvidia-331-updates". To no avail.
> lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)
01:00.0 VGA compatible controller: NVIDIA Corporation GK107GLM [Quadro K2000M] (rev a1)
/etc/apt/sources.list: may be found at pastebin.com
Regarding suggestion by Qasim:
raffael@raffael-GT60~> sudo prime-select nvidia
[sudo] password for raffael:
Error: alternatives are not set up properly
Error: nvidia mode can't be enabled
raffael@raffael-GT60~> sudo prime-select intel
Error: alternatives are not set up properly
Error: intel mode can't be enabled
Regarding 2nd suggestion by Qasim:
sudo apt-get purge nvidia*
[reboot]
sudo apt-get install nvidia-319-updates nvidia-settings-319-updates nvidia-prime
[reboot]
[tried to switch to NVIDIA]
Weird thing is - this actually worked the first time !? Then I switched back to Intel - log off/on - Switched back to NVIDIA - log off/on -> system crashed - error as described above.
Regarding suggestion by Louis Matthijssen:
raffael@raffael-GT60:~$ sudo update-alternatives --set /etc/ld.so.conf.d/x86_64-linux-gnu_GL.conf /usr/lib/nvidia-331-updates-prime/ld.so.conf
update-alternatives: error: alternative name (/etc/ld.so.conf.d/x86_64-linux-gnu_GL.conf) must not contain '/' and spaces
raffael@raffael-GT60:~$ ls -la /usr/lib/nvidia-331-updates-prime
total 44
drwxr-xr-x 2 root root 4096 Mai 2 22:45 .
drwxr-xr-x 196 root root 32768 Mai 3 10:57 ..
-rw-r--r-- 1 root root 0 Apr 4 11:50 alt_ld.so.conf
-rw-r--r-- 1 root root 60 Apr 4 11:50 ld.so.conf
Repeated algo twice - didn't work again :/
Now it seems to work:
raffael@raffael-GT60:~$ sudo update-alternatives --set x86_64-linux-gnu_gl_conf /usr/lib/nvidia-331-updates-prime/ld.so.conf
update-alternatives: using /usr/lib/nvidia-331-updates-prime/ld.so.conf to provide /etc/ld.so.conf.d/x86_64-linux-gnu_GL.conf (x86_64-linux-gnu_gl_conf) in manual mode
raffael@raffael-GT60:~$ sudo update-alternatives --set i386-linux-gnu_gl_conf /usr/lib/nvidia-331-updates-prime/alt_ld.so.conf
update-alternatives: using /usr/lib/nvidia-331-updates-prime/alt_ld.so.conf to provide /etc/ld.so.conf.d/i386-linux-gnu_GL.conf (i386-linux-gnu_gl_conf) in manual mode
Afterwards I could switch to NVIDIA - but wasn't offered the extended "NVIDIA X Server Settings" - will reboot now and see what happens. Follow up: It switched back to Intel after reboot and cannot switch to NVIDIA as usual. To me it seems that your method, Louis, tricks the OS into believing it uses NVIDIA while this is actually not the case.
[Ubuntu 14.04 64bit]
According to NVIDIA-settings I am currently using the Intel GPU (is there a way to verify that via command-line?).
> lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)
01:00.0 VGA compatible controller: NVIDIA Corporation GK107GLM [Quadro K2000M] (rev a1)
> xrandr
Screen 0: minimum 320 x 200, current 2944 x 1080, maximum 32767 x 32767
LVDS1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 345mm x 194mm
1920x1080 59.9*+
[...]
640x480 59.9
VGA1 connected primary 1024x768+1920+312 (normal left inverted right x axis y axis) 0mm x 0mm
1024x768 60.0*
800x600 60.3 56.2
848x480 60.0
640x480 59.9
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
DP-1-1 disconnected
HDMI-1-1 disconnected
VGA1 is plugged in and works more or less - that means it functions as a second screen just that the resolution is very low (it is 1024x768) and the ratio is not correct (it is 4:3). The ratio is actually the bigger issue because I mostly use my large external display for watching movies. Apparently because the ratio is 4:3 instead of 16:9 in full screen mode large parts of the picture is missing.
In the display settings the monitor is shown as "unknown".
What can I do?
I tried upgrading the driver but apparently it is already up-to-date:
> sudo apt-get install xserver-xorg-video-intel
[sudo] password for raffael:
Reading package lists... Done
Building dependency tree
Reading state information... Done
xserver-xorg-video-intel is already the newest version.
I would like to verify what driver is used currently for NVIDIA and then switch the driver to nvidia-331-updates if necessary.
How do I accomplish that?
sudo ubuntu-drivers devices
== /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0 ==
modalias : pci:v000010DEd00000FFBsv00001462sd000010DBbc03sc00i00
model : GK107GLM [Quadro K2000M]
vendor : NVIDIA Corporation
driver : nvidia-331-updates - distro non-free
driver : nvidia-304 - distro non-free
driver : nvidia-304-updates - distro non-free
driver : xserver-xorg-video-nouveau - distro free builtin
sudo ubuntu-drivers list
nvidia-304
nvidia-331
nvidia-331-updates
nvidia-304-updates
(I tried sudo ubuntu-drivers autoinstall and sudo ubuntu-drivers autoinstall nvidia-331-updates - desperatly, in lack of a useful help text - to no avail)
A similar question has been asked recently (How do you use ubuntu-drivers-common or software-properties in the command line to change graphics drivers?) but the asker accepted an answer which doesn't really answer the question. That's why I want to give it another try.
The reason why I am interested in this in the first place is because after fiddling around trying to set up a second monitor suddenly the graphical "additional drivers"-tool stopped working.
I have been doing so many sudo apt-get update/(dist-)upgrade since yesterday and something happend - so that I am confused now whether I am using still beta or the stable version.
How do I figure that out?
(I use Ubuntu 14.04 64bit and the sound card is not broken as it works fine on Windows)
According to most of the reports online installing SC-5500p on Ubuntu seemed to be a cinch for most of the time. Some report that it even worked plug and play. At the end the day it can be said pretty safely that SC-5500p is built on standard audio drivers.
The following seems to be a more detailed version of what the GUI sound manager offers me (no Trust here):
$> cat /proc/asound/cards
0 [PCH ]: HDA-Intel - HDA Intel PCH
HDA Intel PCH at 0xf7410000 irq 47
1 [NVidia ]: HDA-Intel - HDA NVidia
HDA NVidia at 0xf6080000 irq 17
2 [Device ]: USB-Audio - USB Sound Device
USB Sound Device at usb-0000:00:14.0-1, full speed
The following is the output of lsusb -v which regards devices featuring the "Trust". The details of the second entry (after "[...]") is actually leaving no doubt that the referred to device is the SC-5500p.
Bus 003 Device 002: ID 15d9:0a4f Trust International B.V.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x15d9 Trust International B.V.
idProduct 0x0a4f
bcdDevice 1.00
iManufacturer 0
iProduct 1 USB OPTICAL MOUSE
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
[...]
Bus 003 Device 003: ID 145f:0143 Trust
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x145f Trust
idProduct 0x0143
bcdDevice 0.10
iManufacturer 0
iProduct 2 USB Sound Device
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
[...]
As suggested here I altered /etc/pulse/daemon.conf to feature the following two settings - but to no avail:
default-sample-channels = 6
enable-lfe-remixing = yes
Content of /etc/pusle/daemon.conf:
; daemonize = no
; fail = yes
; allow-module-loading = yes
; allow-exit = yes
; use-pid-file = yes
; system-instance = no
; local-server-type = user
; enable-shm = yes
; shm-size-bytes = 0 # setting this 0 will use the system-default, usually 64 MiB
; lock-memory = no
; cpu-limit = no
; high-priority = yes
; nice-level = -11
; realtime-scheduling = yes
; realtime-priority = 5
; exit-idle-time = 20
; scache-idle-time = 20
; dl-search-path = (depends on architecture)
; load-default-script-file = yes
; default-script-file = /etc/pulse/default.pa
; log-target = auto
; log-level = notice
; log-meta = no
; log-time = no
; log-backtrace = 0
resample-method = speex-float-1
; enable-remixing = yes
enable-lfe-remixing = yes
flat-volumes = no
; rlimit-fsize = -1
; rlimit-data = -1
; rlimit-stack = -1
; rlimit-core = -1
; rlimit-as = -1
; rlimit-rss = -1
; rlimit-nproc = -1
; rlimit-nofile = 256
; rlimit-memlock = -1
; rlimit-locks = -1
; rlimit-sigpending = -1
; rlimit-msgqueue = -1
; rlimit-nice = 31
; rlimit-rtprio = 9
; rlimit-rttime = 1000000
; default-sample-format = s16le
; default-sample-rate = 44100
; alternate-sample-rate = 48000
default-sample-channels = 6
; default-channel-map = front-left,front-right
default-fragments = 8
default-fragment-size-msec = 10
; enable-deferred-volume = yes
deferred-volume-safety-margin-usec = 1
; deferred-volume-extra-delay-usec = 0
In conjunction with installation of other USB devices on Ubuntu it is sometimes mentioned that /etc/modules has to be extended with a line telling the kernel to load drivers or something. Currently /etc/modules just contains two lines:
> cat /etc/modules
lp
rtc
See "card2" in the end. I guess this is again my Trust device:
> sudo aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC892 Analog [ALC892 Analog]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 1: ALC892 Digital [ALC892 Digital]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 7: HDMI 1 [HDMI 1]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 8: HDMI 2 [HDMI 2]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 9: HDMI 3 [HDMI 3]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: Device [USB Sound Device], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
In Vim I can actually position the cursor in insert-mode using the mouse. So I assume this should (technically) also be enable-able for the bash. Is it possible? This would be quite useful at times when small changes have to be made to very long commands.
(I am using fish actually, but I guess referring to bash I reach a wider audience.)
Alt+Tab lets me only switch between windows belonging to different applications.
I often use about four terminal bound applications at the same time (e.g. IPython, VIM, fish for system and fish for git).
Even using the mouse, clicking the terminal icon on the launcher being offered takes time to decide which is which. But I don't know so far any way to switch in this case using my keyboard only.
How to handle multiple terminals (and instances of same application in general) efficiently using the keyboard?
With respect to the terminal special case - is there a terminal application allowing sperate terminals in tabs?
And the Oscar goes to ...
tmux
I installed PasswordSafe 0.93 beta by downloading its deb-package from SourceForge and have it taken care of using Ubuntu Software Center.
Now PasswordSafe asks me every time what psafe3-file to load instead of offering me a default one - as it used to be with the Windows version of it. So I thought about having a look at PasswordSafe and its (probably existing) config files and see if I can edit them appropriately. But this endeavour fails at locating the program and its related stuff.
How do I go about finding it?