?
help [-w outfile] [all | command_list]
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.