Hi Nagarani

These scm commands needs to be run from the local machine workspace root location from the user machine.
Example: C:\Users\Administrator\workspace

Login:
C:\Users\Administrator\workspace> C:\IBM\TeamConcert5.0\scmtools\eclipse\scm.exe login -r https://<<hostname:port>>/ccm -n local -u <userid> -P <password>

Status:
C:\Users\Administrator\workspace> C:\IBM\TeamConcert5.0\scmtools\eclipse\scm.exe status
(1021 -- is the changeset id for hi.txt)

Checkin:
C:\Users\Administrator\workspace> C:\IBM\TeamConcert5.0\scmtools\eclipse\scm.exe  checkin C:\Users\Administrator\workspace\Comp1\hi.txt
(1021 -- is the changeset id for hi.txt)

Reference followed:
http://www.ibm.com/developerworks/rational/library/rational-team-concert-command-line-reference/

If this answers your question please mark it as accepted.

Thanks,
Rohit