交互式输入

[root@localhost ~]# ntpq
ntpq> peers
     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
+gus.buptnet.edu 202.112.10.60    3 u   17   64  377   88.144   32.547   5.601
+ntp.verd.co.id  202.162.32.12    3 u   85   64  336  209.770    4.300 167.134
*ktdns.cdnetwork 131.107.13.100   2 u   10   64  377   70.834   33.196  20.738
ntpq> ?
ntpq commands:
:config          delay            mreadvar         readlist
addvars          exit             mrl              readvar
associations     help             mrv              rl
authenticate     host             ntpversion       rmvars
ntpq> q
[root@localhost ~]#

[root@localhost ~]# sqlite3
SQLite version 3.6.20
Enter ".help" for instructions
Enter SQL statements terminated with a ";"
sqlite> .help
.backup ?DB? FILE      Backup DB (default "main") to FILE
.bail ON|OFF           Stop after hitting an error.  Default OFF
.databases             List names and files of attached databases
.dump ?TABLE? ...      Dump the database in an SQL text format
sqlite> .quit
[root@localhost ~]#

[root@84-monitor ~]# mysql -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 1119677
Server version: 5.1.73 Source distribution
mysql> ?
mysql> quit
Bye
[root@84-monitor ~]#

-bash-3.2$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.1.0 Production on Thu Feb 26 15:17:18 2015

Copyright (c) 1982, 2009, Oracle.  All rights reserved.


Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Data Mining and Real Application Testing options

SQL> ?

 HELP
 ----

 Accesses this command line help system. Enter HELP INDEX or ? INDEX
 for a list of topics.

 You can view SQL*Plus resources at
     http://www.oracle.com/technology/tech/sql_plus/
 and the Oracle Database Library at
     http://www.oracle.com/technology/documentation/

 HELP|? [topic]


SQL> quit
Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Data Mining and Real Application Testing options
-bash-3.2$

[root@84-monitor ~]# php -a
Interactive shell

php >
php > b    tab两次
BadFunctionCallException  BadMethodCallException    base64_decode             base64_encode             base_convert              basename
bin2hex                   bind_textdomain_codeset   bindec                    bindtextdomain            bzclose                   bzcompress
bzdecompress              bzerrno                   bzerror                   bzerrstr                  bzflush                   bzread
bzwrite                   bzopen
php > b
php > quit
[root@84-monitor ~]#

[root@84-monitor ~]# python
Python 2.6.6 (r266:84292, Jan 22 2014, 09:42:36)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> help
Type help() for interactive help, or help(object) for help about object.
>>> help()

Welcome to Python 2.6!  This is the online help utility.

If this is your first time using Python, you should definitely check out
the tutorial on the Internet at http://docs.python.org/tutorial/.

Enter the name of any module, keyword, or topic to get help on writing
Python programs and using Python modules.  To quit this help utility and
return to the interpreter, just type "quit".

To get a list of available modules, keywords, or topics, type "modules",
"keywords", or "topics".  Each module also comes with a one-line summary
of what it does; to list the modules whose summaries contain a given word
such as "spam", type "modules spam".

help> q

You are now leaving help and returning to the Python interpreter.
If you want to ask for help on a particular object directly from the
interpreter, you can type "help(object)".  Executing "help(‘string‘)"
has the same effect as typing a particular string at the help> prompt.
>>> exit()
[root@84-monitor ~]#