To be more specific and more clear about what I want to know is that I want a command the enables me to know the history and which command I run at this history/time.

FYI I used the following command but it did not work with me:
#export HISTTIMEFORMAT=`%F %T`

Answer:

Code:
# export HISTTIMEFORMAT="%Y-%m-%d %H:%M:%S"
or (equal)
 

Code:
# export HISTTIMEFORMAT="%F %T "
and results
 

Code:
# history
   36  2011-04-13 23:55:19 history
   37  2011-04-13 23:55:22 history
 

Code:
# export HISTTIMEFORMAT="%a %b %d %H:%M:%S %Y "
 

Code:
# history
   36  Çar Nis 13 23:55:19 2011 history
   37  Çar Nis 13 23:55:22 2011 history
 

Note:

BASH

Code:
# export HISTTIMEFORMAT="%F %T "
# history
1001  2011-04-18 23:21:22 history
1002  2011-04-18 23:21:30 export HISTTIMEFORMAT="%F %T "
1003  2011-04-18 23:21:32 history
KSH
 

Code:
# PS1='$(date "+%F %T"|read -s)# ' 
# history | sed '$!N;s/^\([0-9][0-9]*[\t ]*[0-9][0-9]*-[0-9][0-9]*-[0-9][0-9]*.*\)\n[0-9][0-9]* *\(.*\)/\1 \2/'
602     2011-04-18 23:22:01     ls
604     2011-04-18 23:22:05     ls -l
606     2011-04-18 23:22:07     history
TCSH
 

Code:
# set history= ( 1500 "%h %Y-%W-%D %P %R\n" )
# history
   14 2011-04-18 23:23:17 ls -l
   15 2011-04-18 23:23:20 history

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