help [-s keyword]

[root@sylixos:/root]# help help           
display help information.
help [-s keyword]
[root@sylixos:/root]# 

[root@sylixos:/root]# help
ps
lsmod
modulegcov           [kernel module handle]
modules              [module name]
modulestat           [program file]
rmmod                [kernel module file *.ko]
insmod               [-x] [kernel module file *.ko]
moduleunreg          [kernel module handle]
modulereg            [kernel module file *.ko]
dlconfig             {[share {en | dis}] | [refresh [*]]}
exec                 [program file] [arguments...]
which                [program file]
mmaps
qosruledel           [netifname] [rule sequence num]
qosruleadd           [netifname] [rule] [args...] [s|d|b] [prio] [dont_drop]
qoss
npfruledel           [netifname] [input | output] [rule sequence num]
npfruleadd           [netifname] [rule] [input | output] [allow | deny] [args...]
npfs
nattraffic           ['on' / 'off']
nats

Press <ENTER> to continue, <Q> to quit:

[root@sylixos:/root]# help help
display help information.
help [-s keyword]
[root@sylixos:/root]#

[root@sylixos_station:/root]# help l？ln                   [-s | -f] [actualpath] [sympath]
ll                   [path name]
ls                   [path name]
[root@sylixos_station:/root]#