history cammand with date format !!!

shipon_97 · 02-17-2009, 12:22 PM

Friends ,

In aix unix server I can see the the 'history' command with exporting this line " export HISTTIMEFORMAT="%D%T - "" from the "bash" sehll . But I cannot see history command with date using " export HISTTIMEFORMAT="%D%T -"" from "ksh" shell .

Like ,

bash-3.00$ export HISTTIMEFORMAT="%D%T - "
bash-3.00$ history
2 02/18/0900:15:14 - df -g
3 02/18/0900:15:17 - pwd
4 02/18/0900:15:22 - history

Here I see with the date format .

But in ksh shell ,

$ export HISTTIMEFORMAT="%D%T - "
$ history
876 absh
877 bash
878 bash
879 clear
880 bash-3.00$ history
881 2 02/18/0900:15:14 - df -g
882 3 02/18/0900:15:17 - pwd
883 4 02/18/0900:15:22 - history
884 clear
885 export HISTTIMEFORMAT="%D%T -
886 clear
887 export HISTTIMEFORMAT="%D%T -
888 bash
889 clear
890 export HISTTIMEFORMAT="%D%T - "
891 history

I cannot see the date with the line here .

Can u plz tell me why it is happening and how can i see it in the ksh shell ?

ncsuapex · 02-17-2009, 12:46 PM

Not sure about AIX but in linux you can add this line to your /etc/profile:

HISTTIMEFORMAT="%c # "

might have to log out and log back in to see the results.

colucix · 02-17-2009, 01:05 PM

In ksh HISTTIMEFORMAT has no effect at all. Here is the difference between environment variables related to history:

Code:

	/bin/ksh	/bin/bash
			HISTCONTROL
	HISTCMD	
        HISTEDIT
        HISTFILE	HISTFILE
        HISTSIZE        HISTSIZE
                        HISTFILESIZE
			HISTIGNORE
			HISTTIMEFORMAT

colucix · 02-17-2009, 01:13 PM

Just out of curiosity I googled and found this:

Quote:

AIX supports timestamps in the ksh and ksh93 shell history from AIX 5.3 on. Export EXTENDED_HISTORY=ON from the /etc/profile or your ~/.profile

Also this (related to linux)

Quote:

ksh doesn't have any feature intended to put timestamps in history. You can get a similar effect by combining the evaluation of the PS1 prompt and the "read -s" feature that reads into history.

PS1='$(printf "%(# %D %T )T" | read -s)$ '

This prompt setting will put the current date and time into the history each time ksh comes back to printing a prompt. The timestamp will appear as a separate line. It will show the time that the preceeding command completed. You won't be able to know exactly when a long-running command was started. (The bash timestamp feature shows the start times of entered commands and doesn't show when they finish).

Hope one of these solutions fit your needs.