help

Alias

?

Usage

help [-w outfile] [all | command_list]
    

Description

Display a description of the named functions, including syntax.  The 
'all' option displays help information for every command.
    

Example 4-7. help

>> help
?                info             po               symbol
addtypes         ldcmds           print            symtab
base             load             ps               t
bt               md               px               task
deftask          mmap             q                trace
dis              module           q!               unload
dt               namelist         quit             version
dump             nmlist           report           vi
findsym          od               s390dbf          vtop
fsym             offset           savedump         walk
h                p                set              whatis
help             page             sizeof
history          pb               stat
id               pd               strace

>> ? h
command: history [n]

    Without the optional parameter, displays the current history. Optional 
    argument 'n' specifies the number of commands that are kept in the 
    history list.