03-06-2017
Well, it's a bit open ended and the answer is "It depends."
Firstly, what OS and version are you using? The output from
uname -a would be very useful here.
What sort of thing are you looking for?- If you are looking for use of sudo then that should be picked up by syslog (or rsyslog)
- If you want to know who logged on and from where, that depends on the OS
- If you want to know who edited or deleted a file, it depends on who could edit or delete the file and if they had to get any elevated privileges to do so.
- etc.
- etc.
You need to be much more specific and then we can ask questions of what you might have set up that we can help you use.
Can you elaborate a little? A bit of history and context would be useful here.
Kind regards,
Robin
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WRITE(1) Linux Programmer's Manual WRITE(1)
NAME
write - send a message to another user
SYNOPSIS
write user [ttyname]
DESCRIPTION
Write allows you to communicate with other users, by copying lines from your terminal to theirs.
When you run the write command, the user you are writing to gets a message of the form:
Message from yourname@yourhost on yourtty at hh:mm ...
Any further lines you enter will be copied to the specified user's terminal. If the other user wants to reply, they must run write as
well.
When you are done, type an end-of-file or interrupt character. The other user will see the message EOF indicating that the conversation is
over.
You can prevent people (other than the super-user) from writing to you with the mesg(1) command. Some commands, for example nroff(1) and
pr(1), may disallow writing automatically, so that your output isn't overwritten.
If the user you want to write to is logged in on more than one terminal, you can specify which terminal to write to by specifying the ter-
minal name as the second operand to the write command. Alternatively, you can let write select one of the terminals - it will pick the one
with the shortest idle time. This is so that if the user is logged in at work and also dialed up from home, the message will go to the
right place.
The traditional protocol for writing to someone is that the string `-o', either at the end of a line or on a line by itself, means that
it's the other person's turn to talk. The string `oo' means that the person believes the conversation to be over.
SEE ALSO
mesg(1), talk(1), who(1)
HISTORY
A write command appeared in Version 6 AT&T UNIX.
AVAILABILITY
The write command is part of the util-linux-ng package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.
12 March 1995 WRITE(1)