In most versions of unix the maximum length of the username field is 8 characters. Longer username fields can be allowed but the effects are unpredictable.
See on your unix system:
It could be quite different for your Linux.
Btw. If you have the "fwtmp" utility it should display whatever is in the wtmp file.
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 ULTRIX
shexp
shexp(1) General Commands Manual shexp(1)Name
shexp - display password expiration information for a user
Syntax
shexp [-q] [username]
Description
The command is used to display a user's password expiration information. The specified username, or logname if no username is supplied, is
converted to a UID by searching through the passwd file. The UID is then used to look up the user's entry in the Auth Data Base. The
password expiration information is then printed out in format.
% shexp
Expires Tue Dec 6 10:49:18 EST 1988
If the password has already expired the word Expires will be replaced with the word Expired. If password expiration is disabled for the
particular user in question the output of will be Never expires.
Options-q Instead of displaying the expiration date and time in format, outputs it as three decimal numbers: the minimum password lifetime, the
maximum password lifetime, and the password modification time. All three numbers are displayed as they are found in the database.
Restrictions
Only the super-user may obtain information about users with UIDs other than the real UID of the invoking process.
Diagnostics
User not found in passwd data base.
There is no entry in for the specified username.
Cannot stat auth file.
The database is missing (security features may not be enabled).
Insufficient privilege.
An insufficiently privileged user is asking for information about a username with a UID different then their current real-UID.
An exit value of 0 indicates a successful operation, any other exit status indicates an error.
FilesSee Alsopasswd(1), getauthuid(3), auth(5)
Security Guide for Users
shexp(1)