I have dual boot many time normally i use / As / is the Top of hierarchical model of OS
what does other like :-
/boot
/home
/tmp
/usr
/var
/srv
/opt
/urs/local
used for ? What are meaning of these ?

I have dual boot many time normally i use / As / is the Top of hierarchical model of OS
what does other like :-
/boot
/home
/tmp
/usr
/var
/srv
/opt
/urs/local
used for ? What are meaning of these ?

Roughly speaking these all are basically different directories of your system. Each directory is created for different purposes. For example
/boot - To store boot related files, grub config files etc
/home - user home directory all users data is stored under this directory
and so on..you can get the complete list from google.
The root directory i.e. / directory is the parent of all these directories.The / directory contains all these directories.
While installing if you select / as a mount point then a single partition is created for / directory and hence all these directories will be created in that partition but sometimes it is preferred to create separate partitions for some directories like /boot, /home etc. because it helps while reinstalling or updating the system.
Hence if you want to create the separate partition for /boot you just create 3 patitions(1 swap, 1 for / and 1 for /boot) and for 3rd partition you select /boot as the mount point.
I hope this clears your doubts!