can't see command history in linux

the shell this user uses is ksh.


[oracle@palmdale:/home/oracle]cat /etc/passwd | grep oracle
oracle:x:500:500::/home/oracle:/bin/ksh
[oracle@palmdale:/home/oracle]

I don't have .profile under the oracle home folder:

$ ls -alth
total 24K
-rw-------  1 oracle oinstall   44 May 19 20:06 .sh_history
drwx------. 2 oracle oinstall 4.0K May 19 20:03 .
drwxr-xr-x. 5 root   root     4.0K May 14 23:49 ..
-rw-r--r--. 1 oracle oinstall   18 Jul  9  2013 .bash_logout
-rw-r--r--. 1 oracle oinstall  176 Jul  9  2013 .bash_profile
-rw-r--r--. 1 oracle oinstall  124 Jul  9  2013 .bashrc
$

In fact, the oracle user has two profile files. One is .bash_profile, the otehr is .profile. what is the difference between these two files?

[oracle@palmdale:/home/oracle]ls -alth | grep profile
-rw-r--r--   1 oracle oinstall   222 Sep 18  2014 .bash_profile
-rw-r--r--   1 oracle oinstall  1.5K Jan 30  2007 .profile
[oracle@palmdale:/home/oracle]cat /etc/passwd | grep oracle
oracle:x:500:500::/home/oracle:/bin/ksh
[oracle@palmdale:/home/oracle]

Here is the content of the .profile.

export PATH LIBPATH ORACLE_HOME
PS1='[$LOGNAME@$PWD]'
if [ -s "$MAIL" ]           # This is at Shell startup.  In normal
then echo "$MAILMSG"        # operation, the Shell checks
fi                          # periodically.

set history 100
if [ -t 0 ]; then
   stty intr ^C
fi
if [ -s "$MAIL" ]           # This is at Shell startup.  In normal
then echo "$MAILMSG"        # operation, the Shell checks
fi                          # periodically.
if [ -z "$REMOTEHOST" ]
then
DISPLAY=`hostname`:0.0; export DISPLAY
else
DISPLAY="$REMOTEHOST":0.0; export DISPLAY
fi
#DISPLAY=localhost:1; export DISPLAY
#xhost + localhost

ORACLE_BASE=/usr/orasw; export ORACLE_BASE
export NLS_LANG=AMERICAN_AMERICA.WE8ISO8859P1
export NLS_DATE_FORMAT="DD-MON-YYYY HH24:MI:SS"
#ORACLE_TERM=xterm; export ORACLE_TERM
LD_LIBRARY_PATH=/lib:/usr/lib:/usr/local/lib
#LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$ORACLE_HOME/network/lib:$ORACLE_HOME/jdbc/lib:/usr/local/lib
export LD_LIBRARY_PATH
export TERM=vt100
. /home/oracle/.db102
#. /home/oracle/.db10103
PATH=/usr/bin:/bin:/usr/ccs/bin:/usr/ucb:/usr/local/bin:$ORACLE_HOME/bin:/usr/X11R6/bin:/usr/bin/X11:$HOME/bin:/usr/java/j2sdk1.4.2_06/bin:.
export PATH
alias l='ls -atl | more'
alias h=history
alias greenwin='xterm -sb -bg aquamarine&'
alias bluewin='xterm -sb -bg lightblue&'
alias print_small='qprt -z1 -s lineprinter -p17 -P5SI_OPS_1'
#alias sid='echo $ORACLE_SID'
stty erase ^?
set -o vi
umask 022
export ORACLE_TERM=xterm
export CVUQDISK_GRP=oinstall
export TEMP=/tmp
export TMPDIR=/home/tmpdir
~

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