I am little surprised to find that Ubuntu Linux skips development man pages by default on cloud-based images. A quick search using apt-cache pointed out that I need to install the manpages-dev package on a Ubuntu Linux. It includes manual pages about using GNU/Linux for development. The manpages-posix-dev package includes manual pages about using a POSIX system for development. The man-db package is the on-line manual page i.e. actual man command to view man pages on a Ubuntu or Debian Linux.
Install development man pages on Ubuntu/Debian Linux
Type the following apt-get command to install various packages to view man pages for C standard library functions in Ubuntu or Debian system:
$ sudo apt-get install manpages-dev man-db manpages-posix-dev
How do I view man pages?
To view library calls (functions within program libraries), enter:
$ man 3 function-name
$ man 3 putc
$ man 3 strlen
$ man 3 printf
$ man 3 scanf
$ man 2 execve
$ man 2 fork
The number 3 or 2 indicates the section numbers of the manual as follows:
- 2 : System calls (functions provided by the kernel)
- 3 : Library calls (functions within program libraries)
See man page sections for more info:
$ man man
- Debian Linux Install GNU GCC Compiler and Development Environment
- HowTo: Linux / UNIX Create a Manpage
- How do I Print Out a Linux man or info Page?