anurag@localhost:~$ sudo apt-get install eclipse
sudo: unable to resolve host localhost.localdomain
[sudo] password for anurag:
Reading package lists... Done
Building dependency tree
Reading state information... Done
eclipse is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 11 not upgraded.
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue [Y/n]? y
Setting up cvs (2:1.12.13+real-6ubuntu0.1) ...
Allowing use of questionable username.
Adding group `_cvsadmin' (GID 130) ...
groupadd: cannot lock /etc/group; try again later.
addgroup: `/usr/sbin/groupadd -g 130 _cvsadmin' returned error code 10. Exiting.
dpkg: error processing cvs (--configure):
 subprocess installed post-installation script returned error exit status 1
No apport report written because MaxReports is reached already
                                                              Errors were encountered while processing:
 cvs
E: Sub-process /usr/bin/dpkg returned an error code (1)