Postings by robert rottermann

no space left on /boot

Hi there,

after many years of dutiful service one of my remote boxes stops to accept updates.

It complains that there is no space on /boot

But I can not delete any of the old kernels as the following dialogs show

how can I clean up things?


root@salome ~ # uname -r

root@salome ~ # apt-get purge vmlinuz-4.4.0-81
Reading package lists... Done
Building dependency tree
Reading state information...

time not showing on 17.10

Hi there,

on my laptop (dell xps15) I installed the new and shiny 17.10.

it works well so far, i like its crispy look on the high resolution screen.

what I am missing, is the time display in the top right corner, and I
could find no way to make it reappear.

can anybody please give me an idea how to fix that.



no dns resolver when OpenVPN is running

hi there

i installed OpenVPN a long time ago and I started it manually from the cli up to
now. Everything worked fine.

Today I installed network-manager-openvpn-gnome, and now can open the vpn
connection from the UI which ist much more convenient.

only ...

As long as the VPN is running, the dns resolver does not work any more, and I
can not connect to the internet.

how can I fix that?


how to disallow weak algorithms from ssh


|hi ther,|

|I had one of my servers tested using <a href="" title=""></a>

it did point me to the following week algorithms that the server seams
to allow.

Where can I disallow them?




Diffie-Hellman with 2048-bit Oakley Group 14 with SHA-1 hash
Oakley Group 14 should be secure for now. SHA-1 is becoming obsolete,
consider using SHA-256 version.

upgrade fails with unmet dependencies

Hi there,

on one of my live servers I wanted to do an apt upgrade.

It failed with an error, and now every attempt to upgrade fails.

Can somebody give me a pointer how to fix this?

thanks very much


root@salome ~ # apt upgrade
Reading package lists... Done
Building dependency tree
Reading state information...

how to add a new gateway to an existing network card to access virtual box

hi there

I have a ubuntu 16.04 running on a remote server, for which I have a
fixed address assigned by the provider.

on this machine I have a virtual box virtual server running with a
static address of

how do I add a gateway to access this address. it needs to be accessible
only on the remote server. not from the internet.



ubuntu 16.04 became VERY slow

Hi there,

i am using ubuntu 16.04 on on a reasonably modern box.

During the last couple of weeks it has become unbearably slow.

Top shows

Tasks: 309 total, 1 running, 307 sleeping, 0 stopped, 1 zombie
%Cpu(s): 7.5 us, 1.9 sy, 0.0 ni, 90.6 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
KiB Mem : 8080208 total, 241524 free, 3555784 used, 4282900 buff/cache
KiB Swap: 8364028 total, 5313096 free, 3050932 used.

16:10 update, laptop looses network when going to sleep mode

Hi there,

I update my del xp15 to ubuntu 16.10.

Now when I close the lid and it goes to sleep mode and the wakes up
again it looses the network connection.

To reattach the network, I have to restart the network-manager.

From the messages during the wakening process i get the impression,
that the network is running in the beginning of it, but then later the
connection is lost.

Any idea how to fix this?



upgrade to 16.04: php only produces gibberish

Hi there,

I upgraded a server from 14.04 to 16.04.

I have a number of php services running on this box.

Now they only produce pages of the format:

| | Author: Aleksander Machniak |
+-------------------------------------------------------------------------+*/ //
include environment require_once 'program/include/iniset.php'; // init
application, start session, init output class, etc.

is it possible to "upgrade" a linux box, by just overwriting everything from an other ISO?

Hi there,

I have a minix appliance (neo z64, intel Z3735F) with android KitKat 4.4.4.

Now I would like to install a Linux onto it.

I managed to install ubuntu 14.1 and 16.04 by creating bootable stick.

ubuntu 8.1, how to install software

Hi there,

I installed ubuntu 8.1 in a virtual box. (I need to test an old version
of firebird)
Now I would like to install some tools like subversion.
How can I do that. apt-get does not find anything.


how to access android mobile from bash

Hi there,

I have ubuntu 16.04 installed.
when I attach an android device a files browser windows pups up and I can
navigate trough the files on the phone.
However I would like to download the files using rsync.

no wlan after install of 16.04 (dell xps15)

Hi there,
I installed ubuntu 16.04 on my dell xps 15.
Unfortunately wlan does not work any more.

no wlan is offered in the system settings, and
and no wlan device is in the /etc/network/interfaces.

root@lappi:/home/robert# cat /etc/network/interfaces
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback

this is what lspci displays:

root@lappi:/home/robert# lspci -vnn -d 14e4:
06:00.0 Network controller [0280]: Broadcom Corporation BCM4352 802.11ac
Wireless Network Adapter [14e4:43b1] (rev 03)
Subsystem: Dell BCM4352 802.11ac Wireless Network Adapter [1028:

public key not valid anymore after update to 16.04

Hi there,
I updated my ubuntu 15.10 box to 16.04 beta.

Now my public keys do not "work" any more. I can not log into any of the remote
machines I could before.
Why could that be?
Is there a way to fix that without generating new keys?


bind 9 fails to update

Hi there,
I am running Ubuntu 14.04.4 LTS.
Now when I try to upgrade I get the following error:
Setting up bind9 (1:9.9.5.dfsg-3ubuntu0.8) ...
locale: Cannot set LC_ALL to default locale: No such file or directory
* Starting domain name service...

DELL XPS 15 dos not wake from suspend: A solution hopefully

Hi there,

for some months I was fighting the fact, that my dell xps15 with 4k display did
not wake from suspend to a usefull state.
It did wake from suspend but the the screen remained black and also all the
periphery (keyboard, wlan) did not respond.

Now I hopefully have found a solution (based on
<a href="" title=""></a> et all):
I created a file: /etc/pm/config.d/00-use-suspend-hybrid
with the following content:


# Always use hibernate instead of suspend, but with "suspend to both"

if [ "$METHOD" = "suspend" ]; then


no network (eth0/wlan0) after reinstall of 15.10

Hi there,

after reinstalling 15.10 (using the option in its install menu to
reinstall preserving user data) I have no entries in
/etc/network/interfaces but the local interface.

how can I add the by hand? And have them work of course.
It looks as if just adding the wlan0 interface to
/etc/network/interfaces does not help.


smartctL for mmcblk

hI there,

I am looking for a way to use the smarttools especially smartctl for a mmcblk

I would like to use it for an sd card that has an SMART interface integrated.
Unfortunately under Linux the manufacturer only provides a utility that supports
sdx devices.

thanks for your ideas

ping questions

Hi there,

At work I have an internet connection with a static IP. A Zyxel isdn
modem is connected to it.
Trying to ping that IP from outside fails (100% loss).

When I am logged in a pc in a private network behind the modem, I can
ping the that same IP without loss.

Why is that so?

thanks for your info

kate NEARLY usable for remote files

Hi friends in ubuntu,

my favourite programmers editor is kate.
On of the main reasons (THE main reason, actually) is that it allows to
edit remote files with perfect ease.
Just open it using an url that points to the file like
fish:// ... at remotebox dot ch/etc/hosts (where fish:// is the protocol to use).

now the bad part:
it does not work..
at least, only clumsily ..

I have to open a remote file from a shell calling kate with the file as
a parameter:
kate fish:// ... at remotebox dot ch/etc/hosts

then it opens the file nicely, it even reloads it when the session is
reloaded at a later time.


questions re kubuntu 15.10 on "high"-resolution laptop.

Hi there,

I just installed kubuntu 15.10 on my dell xps15 wich has a
"retina"-like 4-k display.

Now I have two questions:
1. I can not log into the net, and I do not find any way to configure
the network (both wireles and wired). Where do I find this settings?
I found how to set a internet proy, but not how to set the ip address..
2. How can I scale UI?
I found "scale display" in the system setting. But this only sales
the content of opened windows, but not the UI.. How do I scale the UI


kubuntu V15.10 extremely sluggish to use, switching windows slooooow

Hi there,

I did install kubuntu 15.10 on my ubuntu box.
Now working with it is very sluggish.
It sometimes takes 5-10 seconds when I click a window until it is
activated. Or when I want to enter the subject of a mail it takes very
long until the entered text is displayed.

But not always. Sometimes everything works nice and smoothly.

I need to say, that I installed over an existing ubuntu with unity, and
I did keep the home.

thanks for your tips.


how to adapt kubuntu 15.10 for high resolution

Hi there,
I just installed kubuntu 15.10.

I have difficulties to set it for my high resolution laptop (dell xps15).
I can set the screen zoom factor. This seems to work for applications like
mozilla. But the desktop elements still remain very small and very hard to use.

thanks for your input


where is the network configuration tool in kubuntu 15.10

Hi there,
I just installed kubuntu 15.10.
But I find no way to configure the network connections.
In the system setting I can configure the internet, but I do not see where to
setup wlan and wired connections.

thanks for your input


ubuntu 14.04 periodically becomes VERY slow

Hi there,
one of my boxes with ubuntu 14.04 periodically becomes extreamly slow.
the desktop halts for periods of maybe 10 to 30 seconds. the active
windows just grays out.

If I have to running in a window during such periods, I can see nothing
special. No process runs to more than a few % cpu.

any idea, what could be the reason?


suspend does not wake up anymore

Hi there,
for a couple of days now, my dell XPS does not wake up when it entered suspend mode.
This is very cumbersome ..

It worked up to some days ago (with only inor glitches).
I did only install upgrades with apt get lately.

Any idea how to fix that?
thanks robert

skype stopped emmitting sound

Hi there,

since yesterday skype on my ubuntu 15.04 boy stopped emitting any sound.

Sound still works fine in other programs.

I probably have apt-get updated things as I do that regularly but have not
installed anything new.

I reinstalled skype but still the same.

In the list of devices in skype I found only "virtual" as possible selection.

any idea what I can do?


ubunt 15.04 still problems with kate & fish

Hi there,

some month ago I got help regarding the fact that the kate editor does not
really support the fish protocol from its file open dialog.

the following does not work:
when I try to open a remote file from kates open dialog:

File name:fish://root@urgestein/etc/hosts

i get a error box with the following error message:


File not found.

Please verify the correct file name was given.

however, if I load the same file from the command line:
robert@lappi:~$ kate fish://root@urgestein/etc/hosts

the file is loaded as expected.

now I would like to file a ticket, hoping that t

ssh tunnel fails to connect

Hi there,

from both my laptop with ubuntu 15.04 and my desktop with ubuntu 14.1
i can not set up a ssh tunnel.

i run the following command:
robert@mozart:~$ ssh -N -R 50005:localhost:50005 ... at 10 dot 42.0.49

however, when I try to connect to the tunnel from the remote system with:
telnet localhost 50005
i get :
Connected to localhost.
Escape character is '^]'.
Connection closed by foreign host.

and on the local system i get:
connect_to localhost port 50005: failed.

I tried a number of different ports.
but all of them show the same behavior.

to my knowledge, there is n

using clonezilla or partclone from the commandline to create a "sparse" img file

Hi there,

I would like to copy the contents of an sd-card that contains two
partitions (actually a raspberry boot and data partition) into a file
that later can be used to copy to an other sd-card .

using a python script, this works well when I just open the device
pointing to the sd-card (like /dev/sdc) as a file, and the copy its
content to a disk file.
to restore it, I copy that disk file to the device again.

However, this approach has big disadvantages:
my disk file is exactly as big as the the sd-cards capacity.
And, worse, to copy it back again, I need a sd-card with the same