hi,
I have couple redhat linux server's history command output is not right, how can I change it? the outpput is:

this is the right output I expected:

703 Apr/26 - 11:24:44 su
704 Apr/26 - 12:24:58 exit
705 Apr/27 - 15:05:35 ls -ltrh /home/oiprod/go_live/
706 Apr/27 - 15:05:41 pwd
707 Apr/27 - 15:41:05 history

this history's output date alway remain on Apr/04 , and time is not right too, how do I change it?
946 Apr/04 - 15:16:24 /usr/local/tomcat/bin/startup.sh
947 Apr/04 - 15:16:42 ls -las /usr/local/tomcat/webapps/
948 Apr/04 - 15:17:40 ls -las /usr/local/tomcat/work
949 Apr/04 - 15:18:07 /home/tomcat/rotation_add.sh
950 Apr/04 - 15:19:33 history
951 Apr/04 - 15:19:49 date
952 Apr/04 - 15:41:24 history
[root@96743-oi9 ~]# date
Fri Apr 27 15:56:58 EDT 2007
[root@96743-oi9 ~]#


and third one don't have date and time at all.
1007 tail -f /var/log/loadbalancer
1008 history
1009 histroy
1010 history
1011 man histroy
1012 man history
1013 history

thanks in advance!

You have to set the HISTTIMEFORMAT variable.

For example:
export HISTTIMEFORMAT=%c
will make it use your locale's preferred format.

"man strftime" will give you other format options.

I use env command to find the format at server has right output: HISTTIMEFORMAT=%h/%d - %H:%M:%S
so I did:
[root@83972-oi2 ~]# export HISTTIMEFORMAT=%h/%d - %H:%M:%S
-bash: export: `-': not a valid identifier
-bash: export: `%H:%M:%S': not a valid identifier
[root@83972-oi2 ~]#

what format should I put after %h/%d?

and also I checke the server with wrong date hisotry ooutput, it has the same HISTTIMEFORMAT=%h/%d - %H:%M:%S, so format is not the reason why it display the wrong time.

It didn't understand your syntax - you need to encapsulate it in quotes:

export HISTTIMEFORMAT='%h/%d - %H:%M:%S '

That way it will know all of what follows is format. The above format is a little bizzare but does display so long as you put the quotes on it.

Make sure you're in a bash shell when typing "history". The above format has no meaning in other shells such as ksh.

That fact that you're always seeing April 4th makes me think somewhere you hard coded that as the date OR that you typed no commands on that login AFTER April 4th though "history" itself should appear with today's date if you set the variable correctly.