SQL> select * from v$version where rownum=1;
BANNER
--------------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
[oracle@localhost ~]$ cat /etc/issue
Enterprise Linux Enterprise Linux Server release 5.5 (Carthage)
Kernel \r on an \m

SQL> help
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> help index
Enter Help [topic] for help.


@ COPY PAUSE SHUTDOWN
@@ DEFINE PRINT SPOOL
/ DEL PROMPT SQLPLUS
ACCEPT DESCRIBE QUIT START
APPEND DISCONNECT RECOVER STARTUP
ARCHIVE LOG EDIT REMARK STORE
ATTRIBUTE EXECUTE REPFOOTER TIMING
BREAK EXIT REPHEADER TTITLE
BTITLE GET RESERVED WORDS (SQL) UNDEFINE
CHANGE HELP RESERVED WORDS (PL/SQL) VARIABLE
CLEAR HOST RUN WHENEVER OSERROR
COLUMN INPUT SAVE WHENEVER SQLERROR
COMPUTE LIST SET XQUERY
CONNECT PASSWORD SHOW
SQL> help set
SET
---
Sets a system variable to alter the SQL*Plus environment settings
for your current session. For example, to:
- set the display width for data
- customize HTML formatting
- enable or disable printing of column headings
- set the number of lines per page
SET system_variable value
where system_variable and value represent one of the following clauses:
APPI[NFO]{OFF|ON|text} NEWP[AGE] {1|n|NONE}
ARRAY[SIZE] {15|n} NULL text
AUTO[COMMIT] {OFF|ON|IMM[EDIATE]|n} NUMF[ORMAT] format
AUTOP[RINT] {OFF|ON} NUM[WIDTH] {10|n}
AUTORECOVERY {OFF|ON} PAGES[IZE] {14|n}
AUTOT[RACE] {OFF|ON|TRACE[ONLY]} PAU[SE] {OFF|ON|text}
[EXP[LAIN]] [STAT[ISTICS]] RECSEP {WR[APPED]|EA[CH]|OFF}
BLO[CKTERMINATOR] {.|c|ON|OFF} RECSEPCHAR {_|c}
CMDS[EP] {;|c|OFF|ON} SERVEROUT[PUT] {ON|OFF}
COLSEP {_|text} [SIZE {n | UNLIMITED}]
CON[CAT] {.|c|ON|OFF} [FOR[MAT] {WRA[PPED] |
COPYC[OMMIT] {0|n} WOR[D_WRAPPED] |
COPYTYPECHECK {ON|OFF} TRU[NCATED]}]
DEF[INE] {&|c|ON|OFF} SHIFT[INOUT] {VIS[IBLE] |
DESCRIBE [DEPTH {1|n|ALL}] INV[ISIBLE]}
[LINENUM {OFF|ON}] [INDENT {OFF|ON}] SHOW[MODE] {OFF|ON}
ECHO {OFF|ON} SQLBL[ANKLINES] {OFF|ON}
EDITF[ILE] file_name[.ext] SQLC[ASE] {MIX[ED] |
EMB[EDDED] {OFF|ON} LO[WER] | UP[PER]}
ERRORL[OGGING] {ON|OFF} SQLCO[NTINUE] {> | text}
[TABLE [schema.]tablename] SQLN[UMBER] {ON|OFF}
[TRUNCATE] [IDENTIFIER identifier] SQLPLUSCOMPAT[IBILITY] {x.y[.z]}
ESC[APE] {\|c|OFF|ON} SQLPRE[FIX] {#|c}
ESCCHAR {@|?|%|$|OFF} SQLP[ROMPT] {SQL>|text}
EXITC[OMMIT] {ON|OFF} SQLT[ERMINATOR] {;|c|ON|OFF}
FEED[BACK] {6|n|ON|OFF} SUF[FIX] {SQL|text}
FLAGGER {OFF|ENTRY|INTERMED[IATE]|FULL} TAB {ON|OFF}
FLU[SH] {ON|OFF} TERM[OUT] {ON|OFF}
HEA[DING] {ON|OFF} TI[ME] {OFF|ON}
HEADS[EP] {||c|ON|OFF} TIMI[NG] {OFF|ON}
INSTANCE [instance_path|LOCAL] TRIM[OUT] {ON|OFF}
LIN[ESIZE] {80|n} TRIMS[POOL] {OFF|ON}
LOBOF[FSET] {1|n} UND[ERLINE] {-|c|ON|OFF}
LOGSOURCE [pathname] VER[IFY] {ON|OFF}
LONG {80|n} WRA[P] {ON|OFF}
LONGC[HUNKSIZE] {80|n} XQUERY {BASEURI text|
MARK[UP] HTML [OFF|ON] ORDERING{UNORDERED|
[HEAD text] [BODY text] [TABLE text] ORDERED|DEFAULT}|