Thanks for reply. I installed virtuoso from below url and installation steps are followed from same url
link- Setting up Virtuoso on Ubuntu 18.04 « Henriette's Notes
The physical path I installed virtuoso is home/username/virtuoso and this path has directories viz., bin, lib, share, var and virtuoso-opensource-7.2.2
virtuoso-t is located in the path home/username/virtuoso/bin and this location has files viz., inifile, isql-v,isql-vw, virt_mail and virtuoso-t
P.S: Since isql file is not available I am unabke to use isql in command line. Please help me in resolving this issue.