intro(9) - phpMan

addseverity (3)      - introduce new severity classes
bootparam (7)        - Introduction to boot time parameters of the Linux kernel
initramfs-tools (8)  - an introduction to writing scripts for mkinitramfs
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
intro (6)            - Introduction to games
intro (7)            - Introduction to overview, conventions, and miscellany ...
intro (8)            - Introduction to administration and privileged commands
LDP (7)              - Intro to the Linux Documentation Project, with help, g...
pbmtoptx (1)         - convert a portable bitmap into Printronix printer grap...
twintro (8)          - introduction to Tripwire software