I want to learn shell scripting and I will use solaris in my work. Is there any difference between shell scripts on linux and shell scripts on solaris?
The difference is not between Linux and Solaris, the difference is between which shell you are using on each: sh, csh, ksh, zsh, bash etc.
When you write a shell script you should always start it with a shebang indicating what shell the script is written for. For example
#!/bin/bash
or
#!/bin/csh
Note shebang also works for scripting in non-shell languages:
#!/usr/bin/perl
#!/usr/bin/python
The bash shell is now commonly available nearly everywhere, and I suggest that's the one you learn if it's available on you Solaris system.
/bin/sh is the POSIX shell and you should learn that, and the differences between it and bash.
ksh is an improvement over sh, as is zsh (but zsh claims it "is a shell designed for interactive use")
csh is considered evil
These days bash and sh are the ones to learn.