telnet
telnet功能说明：远端登入。
语 法：telnet [-8acdEfFKLrx][-b<主机别名>][-e<脱离字符>][-k<域名>][-l<用户名称>][-n<记录文件>][-S<服务类型>][-X<认证形态>][主机名称或IP地址<通信端口>]
补充说明：执行telnet指令开启终端机阶段作业，并登入远端主机。
参 数：
-8 允许使用8位字符资料，包括输入与输出。
-a 尝试自动登入远端系统。
-b<主机别名> 使用别名指定远端主机名称。
-c 不读取用户专属目录里的.telnetrc文件。
-d 启动排错模式。
-e<脱离字符> 设置脱离字符。
-E 滤除脱离字符。
-f 此参数的效果和指定"-F"参数相同。
-F 使用Kerberos V5认证时，加上此参数可把本地主机的认证数据上传到远端主机。
-k<域名> 使用Kerberos认证时，加上此参数让远端主机采用指定的领域名，而非该主机的域名。
-K 不自动登入远端主机。
-l<用户名称> 指定要登入远端主机的用户名称。
-L 允许输出8位字符资料。
-n<记录文件> 指定文件记录相关信息。
-r 使用类似rlogin指令的用户界面。
-S<服务类型> 设置telnet连线所需的IP TOS信息。
-x 假设主机有支持数据加密的功能，就使用它。
-X<认证形态> 关闭指定的认证形态。
telnet
telnet [options] [host [port] ]
Access remote systems. telnet is the user interface that communicates with another host using the Telnet protocol. If telnet is invoked without host, it enters command mode, indicated by its prompt,
The Telnet protocol is often criticized because it uses no encryption and makes it easy for snoopers to pick up user passwords. Most sites now use ssh instead.
Options
Automatic login to the remote system.
Use bind to bind the local socket to an aliased address or the address of an interface other than the one that would be chosen by connect.
Disable reading of the user's
.telnetrc file.
Turn on socket-level debugging.
Set initial telnet escape character to escape_char. If escape_char is omitted, no escape character is predefined.
With Kerberos V5 authentication, allow forwarding of the local credentials to the remote system.
With Kerberos authentication, obtain tickets for the remote host in realm, instead of in the remote host's realm.
When connecting to remote system and if remote system understands ENVIRON, send user to the remote system as the value for variable USER. Implies the -a option.
Open tracefile for recording the trace information.
Emulate rlogin. The default escape character for this mode is a tilde (~); an escape character followed by a dot causes telnet to disconnect from the remote host; a ^Z instead of a dot suspends telnet; and a ^] (the default telnet escape character) generates a normal telnet prompt. These codes are accepted only at the beginning of a line.
Turn on data-stream encryption if possible.
Request 8-bit operation.
Disable the escape character functionality.
With Kerberos V5 authentication, allow local credentials to be forwarded to the remote system, including any that were already forwarded to the local environment.
Do not allow automatic login to the remote system.
Specify an 8-bit data path on output.
Disable the atype type of authentication.