# Shows the manual for using the command 'ls'
# Searches for all manual pages which mention "ruby"
man -K "ruby"
# Show the ASCII table
# Search man page names and short descriptions for STRING
man -k STRING
# Search the section 3 of the manual for entry "printf"
man 3 printf
# Shows the manual for the conditional operator, '['
# Opens up the manual page for the command 'touch'
# Opens up the manual page for the command 'machine'