Popup message Certificate authority's certificate is invalid

To upload a screenshot, use any pucture upload service of your choice and kust post the link to the uploaded image.

http://en.wikipedia.org/wiki/List_of_photo_sharing_websites

I am providing two links with the problems .

http://i46.tinypic.com/2nsp98k.png
http://i49.tinypic.com/2n0tt0i.png

thanks

Can you give the output of:

sudo apt-get update; sudo apt-get upgrade

Thanks

The output is

ubuntu@moon:~$ sudo apt-get update; sudo apt-get upgrade
[sudo] password for ubuntu:
Ign http://in.archive.ubuntu.com precise InRelease
Ign http://in.archive.ubuntu.com precise-updates InRelease
Ign http://in.archive.ubuntu.com precise-backports InRelease
Ign http://security.ubuntu.com precise-security InRelease
Hit http://in.archive.ubuntu.com precise Release.gpg
Get:1 http://security.ubuntu.com precise-security Release.gpg [198 B]
Get:2 http://in.archive.ubuntu.com precise-updates Release.gpg [198 B]
Get:3 http://security.ubuntu.com precise-security Release [49.6 kB]
Ign http://extras.ubuntu.com precise InRelease
Get:4 http://extras.ubuntu.com precise Release.gpg [72 B]
Get:5 http://in.archive.ubuntu.com precise-backports Release.gpg [198 B]
Hit http://extras.ubuntu.com precise Release
Hit http://in.archive.ubuntu.com precise Release
Get:6 http://in.archive.ubuntu.com precise-updates Release [49.6 kB]
Get:7 http://security.ubuntu.com precise-security/main Sources [41.4 kB]
Hit http://extras.ubuntu.com precise/main Sources
Hit http://extras.ubuntu.com precise/main i386 Packages
Ign http://extras.ubuntu.com precise/main TranslationIndex
Get:8 http://in.archive.ubuntu.com precise-backports Release [49.6 kB]
Get:9 http://security.ubuntu.com precise-security/restricted Sources [1,950 B]
Get:10 http://in.archive.ubuntu.com precise-backports Release [49.6 kB]
Get:11 http://security.ubuntu.com precise-security/universe Sources [12.6 kB]
Hit http://in.archive.ubuntu.com precise/main Sources
Hit http://in.archive.ubuntu.com precise/restricted Sources
Hit http://in.archive.ubuntu.com precise/universe Sources
Hit http://in.archive.ubuntu.com precise/multiverse Sources
Hit http://in.archive.ubuntu.com precise/main i386 Packages
Hit http://in.archive.ubuntu.com precise/restricted i386 Packages
Hit http://in.archive.ubuntu.com precise/universe i386 Packages
Hit http://in.archive.ubuntu.com precise/multiverse i386 Packages
Hit http://in.archive.ubuntu.com precise/main TranslationIndex
Get:12 http://security.ubuntu.com precise-security/multiverse Sources [1,386 B]
Get:13 http://security.ubuntu.com precise-security/main i386 Packages [163 kB]
Hit http://in.archive.ubuntu.com precise/multiverse TranslationIndex
Ign http://extras.ubuntu.com precise/main Translation-en_IN
Hit http://in.archive.ubuntu.com precise/restricted TranslationIndex
Ign http://extras.ubuntu.com precise/main Translation-en
Hit http://in.archive.ubuntu.com precise/universe TranslationIndex
Get:14 http://in.archive.ubuntu.com precise-updates/main Sources [160 kB]
Get:15 http://security.ubuntu.com precise-security/restricted i386 Packages [3,968 B]
Get:16 http://security.ubuntu.com precise-security/universe i386 Packages [42.0 kB]
Get:17 http://security.ubuntu.com precise-security/multiverse i386 Packages [2,369 B]
Hit http://security.ubuntu.com precise-security/main TranslationIndex
Hit http://security.ubuntu.com precise-security/multiverse TranslationIndex
Hit http://security.ubuntu.com precise-security/restricted TranslationIndex
Hit http://security.ubuntu.com precise-security/universe TranslationIndex
Hit http://security.ubuntu.com precise-security/main Translation-en
Hit http://security.ubuntu.com precise-security/multiverse Translation-en
Hit http://security.ubuntu.com precise-security/restricted Translation-en
Hit http://security.ubuntu.com precise-security/universe Translation-en
Get:18 http://in.archive.ubuntu.com precise-updates/restricted Sources [3,285 B]
Get:19 http://in.archive.ubuntu.com precise-updates/universe Sources [50.4 kB]
Get:20 http://in.archive.ubuntu.com precise-updates/multiverse Sources [4,241 B]
Get:21 http://in.archive.ubuntu.com precise-updates/main i386 Packages [382 kB]
Get:22 http://in.archive.ubuntu.com precise-updates/restricted i386 Packages [6,732 B]
Get:23 http://in.archive.ubuntu.com precise-updates/universe i386 Packages [127 kB]
Get:24 http://in.archive.ubuntu.com precise-updates/multiverse i386 Packages [9,672 B]
Hit http://in.archive.ubuntu.com precise-updates/main TranslationIndex
Hit http://in.archive.ubuntu.com precise-updates/multiverse TranslationIndex
Hit http://in.archive.ubuntu.com precise-updates/restricted TranslationIndex
Hit http://in.archive.ubuntu.com precise-updates/universe TranslationIndex
Get:25 http://in.archive.ubuntu.com precise-backports/main Sources [2,422 B]
Get:26 http://in.archive.ubuntu.com precise-backports/restricted Sources [14 B]
Get:27 http://in.archive.ubuntu.com precise-backports/universe Sources [14.2 kB]
Get:28 http://in.archive.ubuntu.com precise-backports/multiverse Sources [1,383 B]
Get:29 http://in.archive.ubuntu.com precise-backports/main i386 Packages [1,941 B]
Get:30 http://in.archive.ubuntu.com precise-backports/restricted i386 Packages [14 B]
Get:31 http://in.archive.ubuntu.com precise-backports/universe i386 Packages [12.4 kB]
Get:32 http://in.archive.ubuntu.com precise-backports/multiverse i386 Packages [999 B]
Get:33 http://in.archive.ubuntu.com precise-backports/main TranslationIndex [72 B]
Get:34 http://in.archive.ubuntu.com precise-backports/multiverse TranslationIndex [71 B]
Get:35 http://in.archive.ubuntu.com precise-backports/restricted TranslationIndex [70 B]
Get:36 http://in.archive.ubuntu.com precise-backports/universe TranslationIndex [72 B]
Hit http://in.archive.ubuntu.com precise/main Translation-en
Hit http://in.archive.ubuntu.com precise/multiverse Translation-en
Hit http://in.archive.ubuntu.com precise/restricted Translation-en
Hit http://in.archive.ubuntu.com precise/universe Translation-en
Hit http://in.archive.ubuntu.com precise-updates/main Translation-en
Hit http://in.archive.ubuntu.com precise-updates/multiverse Translation-en
Hit http://in.archive.ubuntu.com precise-updates/restricted Translation-en
Hit http://in.archive.ubuntu.com precise-updates/universe Translation-en
Hit http://in.archive.ubuntu.com precise-backports/main Translation-en
Hit http://in.archive.ubuntu.com precise-backports/multiverse Translation-en
Hit http://in.archive.ubuntu.com precise-backports/restricted Translation-en
Hit http://in.archive.ubuntu.com precise-backports/universe Translation-en
Fetched 1,177 kB in 2min 47s (7,033 B/s)
Reading package lists... Done
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
ubuntu@moon:~$

thanks

ok and if you run:

sudo apt-get --reinstall install nano

Is it smooth with no errors? If so, run:

sudo apt-get dist-upgrade

Is that smooth too?

the outputs are

ubuntu@moon:~$ sudo apt-get --reinstall install nano
[sudo] password for ubuntu:
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 1 reinstalled, 0 to remove and 0 not upgraded.
Need to get 180 kB of archives.
After this operation, 0 B of additional disk space will be used.
Get:1 http://in.archive.ubuntu.com/ubuntu/ precise/main nano i386 2.2.6-1 [180 kB]
Fetched 180 kB in 2min 21s (1,269 B/s)
(Reading database ... 189233 files and directories currently installed.)
Preparing to replace nano 2.2.6-1 (using .../archives/nano_2.2.6-1_i386.deb) ...
Unpacking replacement nano ...
Processing triggers for install-info ...
Processing triggers for doc-base ...
Processing 2 changed doc-base files...
Registering documents with scrollkeeper...
Processing triggers for menu ...
Processing triggers for man-db ...
Setting up nano (2.2.6-1) ...
Processing triggers for menu ...
ubuntu@moon:~$ sudo apt-get dist-upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
ubuntu@moon:~$

thanks

Looks fine, where is the issue now?

I think the problem is solved now. Please let me check .

Thanks actionparsnip .......the problem is solved ...