Your SERC Computational Account password can be changed by using the command "yppasswd".
Note: Password can be changed by logging into one of the Basic HPC Clusters or Workstations only
List of SERC Workstations and Basic HPC Clusters:
Example:
$ ssh userid@fedlx1_1.serc.iisc.ernet.in [userid@fedlx1_1 ~]$ yppasswd