How to install manpage for gdb on ubuntu?

Question

I don't find the manpage for gdb on ubuntu even I have gdb installed. How to install the manpage of gdb? How to search which package has the manpage? Thanks.

$ man gdb
No manual entry for gdb
$ which gdb
/usr/bin/gdb

question from:https://stackoverflow.com/questions/65894839/how-to-install-manpage-for-gdb-on-ubuntu

Answer 1

Waitting for answers