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Operating Systems AIX all pseudo ttys busy, AIX 5.2 Post 302331860 by lacroix on Tuesday 7th of July 2009 11:13:42 AM
Old 07-07-2009
all pseudo ttys busy, AIX 5.2

I have several users connecting via a Windows-based SSH\telnet client. The previous sysadmin used FacetTerm to allow certain users to switch between multiple "windows." I'm told there are AIX-native ways to do this but I work with what I inherited.

Originally, many users were still connecting via telnet. I know this isn't usually a big risk on a private network but I'd still prefer SSH for the encryption. However, the users that have been switched to SSH have to be very careful about how they end the session. If they simply disconnect or close the client without logging off, they are unable to log back in. Here's a specific example:

Code:
/dev/ptyqd: Permission denied                
Assigned pty cannot be opened.
All pseudo ttys are busy.

I've tried killing processes associated with their username but that doesn't seem to free them up. So far, the only successful fix has been a reboot. I'm comfortable on the command line but I'm a long, long way from a real expert and, in particular, I'm clueless when it comes to anything dealing with ttys. Any input at all will be a help and an education.
 

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AULAST:(8)						  System Administration Utilities						AULAST:(8)

NAME
aulast - a program similar to last SYNOPSIS
aulast [ options ] [ user ] [ tty ] DESCRIPTION
aulast is a program that prints out a listing of the last logged in users similarly to the program last and lastb. Aulast searches back through the audit logs or the given audit log file and displays a list of all users logged in (and out) based on the range of time in the audit logs. Names of users and tty's can be given, in which case aulast will show only those entries matching the arguments. Names of ttys can be abbreviated, thus aulast 0 is the same as last tty0. The pseudo user reboot logs in each time the system is rebooted. Thus last reboot will show a log of all reboots since the log file was created. The main difference that a user will notice is that aulast print events from oldest to newest, while last prints records from newest to oldest. Also, the audit system is not notified each time a tty or pty is allocated, so you may not see quite as many records indicating users and their tty's. OPTIONS
--bad Report on the bad logins. --extract Write raw audit records used to create the displayed report into a file aulast.log in the current working directory. -ffile Use the file instead of the audit logs for input. --proof Print out the audit event serial numbers used to determine the preceding line of the report. A Serial number of 0 is a place holder and not an actual event serial number. The serial numbers can be used to examine the actual audit records in more detail. Also an ausearch query is printed that will let you find the audit records associated with that session. --stdin Take audit records from stdin. EXAMPLES
To see this month's logins ausearch --start this-month --raw | aulast --stdin SEE ALSO
last(1), lastb(1), ausearch(8), aureport(8). AUTHOR
Steve Grubb Red Hat Nov 2008 AULAST:(8)
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