debian:/home/bharat# apt-cache policy libc6
libc6:
  Installed: 2.3.6.ds1-13etch2
  Candidate: 2.6.1-1+b1
  Version table:
     2.6.1-1+b1 0
        500 ftp://ftp.iitm.ac.in testing/main Packages
 *** 2.3.6.ds1-13etch2 0
        500 ftp://ftp.iitm.ac.in stable/main Packages
        100 /var/lib/dpkg/status



debian:/home/bharat# cat /etc/debian_version
4.0