Once again, I am sharing a few good commands with you.
a) Run command in a subshell
$(cd /tmp && ls)
# You will see the contents of /tmp but will stay in PWD only.
b) Reusing cscope database
c) If you default shell is csh, and you want to move to bash as soon as you login
- Create a file .cshrc in your home directory.
- Edit and add "bash"
- Save and exit.
d) vi can help you see a split screen with two or more files. Try :vsplit.