addseverity (3)      - introduce new severity classes
bootparam (7)        - introduction to boot time parameters of the Linux kernel
busctl (1)           - Introspect the bus
intro (1)            - introduction to user commands
intro (2)            - introduction to system calls
intro (3)            - introduction to library functions
intro (4)            - introduction to special files
intro (5)            - introduction to file formats and filesystems
intro (6)            - introduction to games
intro (7)            - introduction to overview and miscellany section
intro (8)            - introduction to administration and privileged commands
oddjobd-introspection.conf (5) - allow introspection of oddjobd
perlguts (1)         - Introduction to the Perl API
perlintro (1)        - a brief introduction and overview of Perl
perluniintro (1)     - Perl Unicode introduction
resolvconf (1)       - Resolve domain names, IPV4 and IPv6 addresses, DNS res...
resolvectl (1)       - Resolve domain names, IPV4 and IPv6 addresses, DNS res...
ttk_intro (n)        - Introduction to the Tk theme engine