nariknahom's questions

I did an upgrade of Ubuntu on WSL from 18.10 to 19.04 with do-release-upgrade.

$ cat /etc/os-release
NAME="Ubuntu"
VERSION="19.04 (Disco Dingo)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 19.04"
VERSION_ID="19.04"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=disco
UBUNTU_CODENAME=disco

But now I notice that repositories/sources.list are still pointing to cosmic.

$ grep -li cosmic /etc/apt/sources.list /etc/apt/sources.list* /etc/apt/sources.list*/*
/etc/apt/sources.list
/etc/apt/sources.list
grep: /etc/apt/sources.list.d: Is a directory
/etc/apt/sources.list.distUpgrade
/etc/apt/sources.list.save


$ grep -li disco /etc/apt/sources.list /etc/apt/sources.list* /etc/apt/sources.list*/*
grep: /etc/apt/sources.list.d: Is a directory 

So I guess something must have failed during the upgrade that I didn't notice.

How can I dig out any upgrade errors and fix them?
Where can I find the sources list for 19.04?

The merge/diff tool Meld is missing preferences option (Edit -> preferences) on Ubuntu 18.10. Is this an general issue or specific to my Ubuntu installation? How can it fixed?

Update for anyone facing the same issue: Seems like a Gnome-Shell feature. Click on the small Down Arrow next to the "Meld" icon on the shell menu bar.

I have Ubuntu installed on VirtualBox and behind proxy. I have set automatic proxy configuration. All applications are able to connect to internet.

However Gnome Shell extensions are not getting installed. With Ubuntu Software center, it shows a timeout error though other applications are getting installed. From Browser on https://extensions.gnome.org, on-off button seems to do nothing (browser extension and chrome-gnome-shell are installed).

With manual proxy setting, Ubuntu Software center throws GDbus.error:org.gnome.shell.downloadinfoerror:4

Can someone help me to fix this?

Note: sudo apt install <other apps> works without any error.

Launching pkexec synaptic in the below environment fails.

My PC specsare:

xfce desktop
ubuntu 18.04 on WSL
VcxSrv for X server

Here is the output:

~$ pkexec synaptic
Error getting authority: Error initializing authority: Could not connect: No such file or directory

Is this error expected? Any fix available?

The O'Reilly Sed & Awk books says that the follow awk expression should match blank lines

/^$/ {
  print x += 1
}

But it seems to be not working with Ubuntu 17.04 mawk.
Why isn't this working?

For example:
the query on ascii.tbl text returns nothing.

~/temp$ cat ascii.tbl 
|000 nul|001 soh|002 stx|003 etx|004 eot|005 enq|006 ack|007 bel|
|010 bs |011 ht |012 nl |013 vt |014 np |015 cr |016 so |017 si |
|020 dle|021 dc1|022 dc2|023 dc3|024 dc4|025 nak|026 syn|027 etb|
|030 can|031 em |032 sub|033 esc|034 fs |035 gs |036 rs |037 us |
|040 sp |041  ! |042  " |043  # |044  $ |045  % |046  & |047  ' |
|050  ( |051  ) |052  * |053  + |054  , |055  - |056  . |057  / |
|060  0 |061  1 |062  2 |063  3 |064  4 |065  5 |066  6 |067  7 |
|070  8 |071  9 |072  : |073  ; |074  < |075  = |076  > |077  ? |
|100  @ |101  A |102  B |103  C |104  D |105  E |106  F |107  G |
|110  H |111  I |112  J |113  K |114  L |115  M |116  N |117  O |
|120  P |121  Q |122  R |123  S |124  T |125  U |126  V |127  W |
|130  X |131  Y |132  Z |133  [ |134  \ |135  ] |136  ^ |137  _ |
|140  ` |141  a |142  b |143  c |144  d |145  e |146  f |147  g |
|150  h |151  i |152  j |153  k |154  l |155  m |156  n |157  o |
|160  p |161  q |162  r |163  s |164  t |165  u |166  v |167  w |
|170  x |171  y |172  z |173  { |174  | |175  } |176  ~ |177 del|




| 00 nul| 01 soh| 02 stx| 03 etx| 04 eot| 05 enq| 06 ack| 07 bel|
| 08 bs | 09 ht | 0a nl | 0b vt | 0c np | 0d cr | 0e so | 0f si |
| 10 dle| 11 dc1| 12 dc2| 13 dc3| 14 dc4| 15 nak| 16 syn| 17 etb|
| 18 can| 19 em | 1a sub| 1b esc| 1c fs | 1d gs | 1e rs | 1f us |
| 20 sp | 21  ! | 22  " | 23  # | 24  $ | 25  % | 26  & | 27  ' |
| 28  ( | 29  ) | 2a  * | 2b  + | 2c  , | 2d  - | 2e  . | 2f  / |
| 30  0 | 31  1 | 32  2 | 33  3 | 34  4 | 35  5 | 36  6 | 37  7 |
| 38  8 | 39  9 | 3a  : | 3b  ; | 3c  < | 3d  = | 3e  > | 3f  ? |
| 40  @ | 41  A | 42  B | 43  C | 44  D | 45  E | 46  F | 47  G |
| 48  H | 49  I | 4a  J | 4b  K | 4c  L | 4d  M | 4e  N | 4f  O |
| 50  P | 51  Q | 52  R | 53  S | 54  T | 55  U | 56  V | 57  W |
| 58  X | 59  Y | 5a  Z | 5b  [ | 5c  \ | 5d  ] | 5e  ^ | 5f  _ |
| 60  ` | 61  a | 62  b | 63  c | 64  d | 65  e | 66  f | 67  g |
| 68  h | 69  i | 6a  j | 6b  k | 6c  l | 6d  m | 6e  n | 6f  o |
| 70  p | 71  q | 72  r | 73  s | 74  t | 75  u | 76  v | 77  w |
| 78  x | 79  y | 7a  z | 7b  { | 7c  | | 7d  } | 7e  ~ | 7f del|



~/temp$ awk '/^$/ {print "Blank " }' ascii.tbl 
~/temp$ 

Update: it turned out that file had CRLF line terminators. After applying dos2unix, this works.

Transmission has stopped working on Ubuntu 15.04. It doesn't download anything. Check the attached pictures. I am not sure how to debug this. Pls help.

I installed Vuze and its able to download the torrents. Works fine. But I prefer to use Transmission as its very lightweight.

I have an old Dell Inspiron 1525, which was only having ubuntu 13.04 installed previously. For reasons not relevant to this post, I had to install Windows Vista that originally came with this laptop. For installing Windows, I moved the Ubuntu installation to a logical partition. Before installating Windows, I had verified booting Ubuntu 13.04 from the new partition. But after installing Windows Vista, the Ubuntu partition is showing as unallocated. I have other partitions (all ext4) and they are all intact. I have checked the partition layout with gparted and also Windows disk managements. Its only the Ubuntu partition that is showing unallocated/free.

Is it possible to recover this Ubuntu partition? And if yes, what are the steps?

I have to wait a long time (about 15s) after entering login credentials. I read some other posts but didn't find anything relevant to my situation. In the .xsession-errors log, there are two errors and I think one of them could be the cause of the delayed login.

compiz (core) - Info: Starting plugin: session
I/O warning : failed to load external entity "/home/user/.compiz/session/10e5e71fff61fc4529136368274098992100000031290040"

and the below nautilus error even though I have disabled Personal File Sharing in startup applications.

Nautilus-Share-Message: Called "net usershare info" but it failed: 'net usershare' returned error 255:  
net usershare: cannot open usershare directory /var/lib/samba/usershares. Error No such file or directory

If one of these is the reason, please help me resolve it. Or let me know what else I could try out.

Update: I removed nautilus-share and dont get that 2nd error anymore.
Any idea what that compiz error means?

Not sure if this the right forum for this question.
Anyway in Chrome browser, Youtube videos are grainy as shown in this image.

There seems to be no problem with other video sites requiring flash. Also the youtube videos play fine in Firefox.

Is this a known issue? Any workarounds?

Ubuntu 12.10 x86_64
Chrome 64 bit Version 25.0.1364.97

I have a problem with Empathy being unable to automatically connect at startup. I have noticed that when Empathy is started manually it logs in automatically but Ubuntu still notifies Password required.

Is this a problem with the Gnome keyring?

I have some applications like eclipse, netbeans, vuze extracted to /opt/ directory. These applications don't show up while searching in unity dash. Is there a way that I can get these applications indexed?

('run a command' does remember the paths after the first time, but pressing the Super button is easier than alt+f2)