How to create .sh_history file

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# 1  
Old 08-20-2001
Data How to create .sh_history file

Thanks PxT answered my "compare two files"question very quick and neat!!:-)

I have a question about .history file I couldn't find any satisfied answer from book.

1. This file was created automatically when you set up user's environment or you have to use a command to create it or you have to "touch" it?

2. If the user doesn't have this file before,can I find out his "history" from somewhere or can I view his "history" by using root previlige? If yes, from which file I can find his history command?

Thanks in advance!
# 2  
Old 08-20-2001

It depends on the shell you are using.
It may be called .bash_history, .history, .sh_history...

Your best bet is to type:
ls -ad .[a-zA-Z]* in the home directory.

Look for something with "history" in the name.

# 3  
Old 08-21-2001
Yes, I know it has different name comes with different shell. My question is how this file was created? I have to manually create it or it was created when I create the user's account? Because in one machine I saw this file under my directory in another machine it doesn't exist. It should have some place to make this happen(define in a system file?)

My another question is: Is it possible to check the user's history if the user doesn't have a history file? where can I go to check?

# 4  
Old 08-22-2001

It should be created automatically by the shell... I may be wrong, though. Also, I think some shells have the ability to turn the shell history recording off - I'm almost sure that at least in some C shells, it can be set by a simple parameter.

If you want to see what they're REALLY doing (.sh_history files can be edited), look into process accounting. It isn't used as often now as it used to, because it can impact the speed of systems with many users / processes, but if it's built into your kernel, you can turn it on or off.

See if the acct command, or something similar exists on your system. If all else fails, try man -k accounting to find it by another name.

# 5  
Old 08-22-2001
Check the man page for your shell. Usually you just need to set an environment variable. For example from my ksh man page:

HISTFILE If this parameter is set when the shell is invoked, its value is the path name of the file that is used to store the command history. The default value is $HOME/.sh_history. If the user has appropriate privileges and no HISTFILE is given, then no history file is used (see Command Re-entry below).

HISTSIZE If this parameter is set when the shell is invoked, the number of previously entered commands accessible to this shell will be greater than or equal to this number. The default is 128.
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