机型：Cisco 3750
现在我们来继续讲解关于输入Cisco 命令时注意的一些事项与帮助
1.关于帮助
直接使用“?”，可以获得相应模式下的所支持的命令列表，如果再问号前面加上一些命令的开头的字母，就可以获得一些以此字母开头的命令，如：
AITG_FrontekCoreSW#s?
*s=show send session set setup
show systat
输入"S?"，就可以获得以S开头的所有字母。
2、命令帮助
如果对某个命令的用法不熟悉时，也可以使用“?”来获取其详细的帮助，如想对show的命令作一个具体的了解，可以使用：“show ?”
AITG_FrontekCoreSW#show ?
aaa Show AAA values
access-lists List access lists
accounting Accounting data for active sessions
adjacency Adjacent nodes
aliases Display alias commands
archive Archive functions
arp ARP table
auto Show Automation Template
auto Show Automation Template
boot show boot attributes
buffers Buffer pool statistics
cable-diagnostics Show Cable Diagnostics Results
cca CCA information
cdp CDP information
cef CEF address family independent status
class-map Show QoS Class Map
clock Display the system clock
cluster Cluster information
cns CNS agents
configuration Configuration details
controllers Interface controller status
dampening Display dampening information
debugging State of each debugging option
derived-config Derived operating configuration
dhcp Dynamic Host Configuration Protocol status
diagnostic Show command for diagnostic
dot1q-tunnel Display dot1q tunnel ports
dot1x Dot1x information
dtp DTP information
eap Shows EAP registration/session information
env Environmental facilities
eou EAPoUDP
errdisable Error disable
etherchannel EtherChannel information
exception exception informations
file Show filesystem information
flash1: display information about flash1: file system
flash: display information about flash: file system
flowcontrol show flow control information
history Display the session command history
hosts IP domain-name, lookup style, nameservers, and host table
html HTML helper commands
idb List of Hardware Interface Descriptor Blocks
identity Identity profiles and policies
idprom show IDPROMs for interfaces
interfaces Interface status and configuration
inventory Show the physical inventory
ip IP information
ipc Interprocess communications commands
ipv6 IPv6 information
key Key information
kron Kron Subsystem
l2protocol-tunnel Display L2PT status and configurations
lacp Port channel information
line TTY line information
link Show Link
location Display the system location
logging Show the contents of logging buffers
login Display Secure Login Configurations and State
mac MAC configuration
mac-address-table MAC forwarding table
memory Memory statistics
mls mls global commands
monitor Monitoring different system events
mvr Show mvr global parameters
ntp Network time protocol
pagp Port channel information
parser Show parser commands
platform platform specific show commands
pm Show Port Manager commands
policy-manager Policy Manager
policy-map Show QoS Policy Map
port-security Show secure port information
post Show the results of the system POST
power Switch Power
privilege Show current privilege level
processes Active process statistics
protocols Active network routing protocols
queue Show queue contents
queueing Show queueing configuration
radius Shows radius information
region Region Manager Status
registry Function registry information
reload Scheduled reload information
resource Resource group statistics
rhosts Remote-host+user equivalences
rmon rmon statistics
route-map route-map information
rtr Service Assurance Agent (SAA)
running-config Current operating configuration
scp SCP commands
sdm Switch database management
service-module Service Module commands
sessions Information about Telnet connections
setup Show express setup settings
snmp snmp statistics
spanning-tree Spanning tree topology
stacks Process stack utilization
standby Hot Standby Router Protocol (HSRP) information
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