You have to use last with -w switch which shows the full logon id of a user:
I do not think there's any other way of checking the owner of the machine. But, the files where the last command checks gets the information (/var/log/wtmp) can be deleted by a log maintenance program like logrotate. So, you may want to verify the first login time of the suspected machine owner with the "modify" time of one of the files like .profile or .bash_profile in root's home directory /root. These files get created when the root account gets created i.e during the installation. If nobody has changed the content of these files, the modify time will be the same as the file creation time.
These are not convenient ways of determining the exact owner of the machine. But, still you can work your way out with these. If you are working on production environment, I would suggest that you implement a schema for each ID creation and tag the IDs with information like who requested for that ID, etc.
writing a script that will check every 5 seconds whether a particular user has
logged into the system
# Determine if someone is logged on
# Version 4.0
if
then
echo “ Incorrect number of arguments”
echo “Usage: $ ison4 <user>”
else
user=“$1”
if who | grep “$user” > /dev/null
then... (2 Replies)
Hi
I am using mailx to send email and am wondering if there is a way I can send the email from a different user than the user logged in.
something like do-not-reply@xyz.com
Thank you. (1 Reply)
Hello,
i know who command gives you the time when particular user logged in. And subtracting today's date and time from the one found in who we can get how much time user logged in. But this can get very much clumsy as we can't subtract date directly in unix . Is there any other way or command... (4 Replies)
Hi, first time poster, newbie to Bash. I'm looking to get the username of the user who's been logged into a computer the most / longest.
I am new to Bash but am familiar with other scripting languages, mainly PHP. So I have a general idea about how to go about the script logic, but don't know... (13 Replies)
How do I confirm if a user logged in, is remote or local? In the case if the user is remote, how to be sure what authentication/method is it using, like LDAP, NIS or other? (2 Replies)
Hey guys
I need a script that reads a login name and verifies if that user is currently logged in
i have found few commands like "who" and "users"
but i wonder how can i verify it that login name is logged in or not? (3 Replies)
hi!
How can I find into:
/var/log/messages.4
/var/log/messages.3
/var/log/messages.2
/var/log/messages.1
/var/log/messages
The last user do a login? (for example user1)
My idea is to search by the pattern "Accepted password for" buy I necessary search into all files first and in the... (2 Replies)
Discussion started by: guif
2 Replies
LEARN ABOUT PHP
chown
CHOWN(3) 1 CHOWN(3)chown - Changes file ownerSYNOPSIS
bool chown (string $filename, mixed $user)
DESCRIPTION
Attempts to change the owner of the file $filename to user $user. Only the superuser may change the owner of a file.
PARAMETERS
o $filename
- Path to the file.
o $user
- A user name or number.
RETURN VALUES
Returns TRUE on success or FALSE on failure.
EXAMPLES
Example #1
Simple chown(3) usage
<?php
// File name and username to use
$file_name= "foo.php";
$path = "/home/sites/php.net/public_html/sandbox/" . $file_name ;
$user_name = "root";
// Set the user
chown($path, $user_name);
// Check the result
$stat = stat($path);
print_r(posix_getpwuid($stat['uid']));
?>
The above example will output something similar to:
Array
(
[name] => root
[passwd] => x
[uid] => 0
[gid] => 0
[gecos] => root
[dir] => /root
[shell] => /bin/bash
)
NOTES
Note
This function will not work on remote files as the file to be examined must be accessible via the server's filesystem.
Note
When safe mode is enabled, PHP checks whether the files or directories being operated upon have the same UID (owner) as the script
that is being executed.
SEE ALSO chmod(3), chgrp(3).
PHP Documentation Group CHOWN(3)