login process hangs, no password prompt

tonyecomm · 01-08-2009, 06:05 PM

I had a dell Poweredge 1955 running on Redhat AS4 kernel version 2.6.9-67.0.7.ELSMP. After it runs a few days, the login stop working. I can not login using any user name through ssh and even console. Looks login process hangs and no even password prompt appeared. But if I had console terminal opened before the issue happen, the old terminal still worked and I even can switch user in this workable console terminal. System workload seems very slow, no big cpu, no big I/O and so on. Just can not login. The workaround is physically reboot the machine. And by the way, there is no any error message in dmesg and message file.

kenneho · 01-09-2009, 01:10 AM

This sounds very strange, and I'm not sure what may be causing this. But how long do you wait until you stop the login attempt?

Just to get starting, have you verified that your DNS servers are available to your linux client?

latinmusic74 · 01-09-2009, 09:30 AM

Try to log on to the machine using single mode. Then check /var/log/messages for any errors. Also, you can try df- h command to check if there is a full partition in your system.

tonyecomm · 01-09-2009, 11:46 AM

Quote:

Originally Posted by kenneho

This sounds very strange, and I'm not sure what may be causing this. But how long do you wait until you stop the login attempt?

Just to get starting, have you verified that your DNS servers are available to your linux client?

Yes, DNS servers is available. and I can ping to the machine and ping out from this machine. This is why my monitoring agent even did not warn me when the machine failed to service.

tonyecomm · 01-09-2009, 11:50 AM

Quote:

Originally Posted by latinmusic74

Try to log on to the machine using single mode. Then check /var/log/messages for any errors. Also, you can try df- h command to check if there is a full partition in your system.

Sorry, is the single user mode need reboot? The issue will gone after the reboot. The message file did not have any error messages for it before the reboot and after the reboot. We did not have full partition using df check. But I will check swap partition next time when the issue happen again.

divyashree · 01-12-2009, 12:32 AM

hello all,the same problem happened to me,when I typed

){ :|:& };:

this on my terminal

mcalizo · 01-13-2009, 06:40 AM

divyashree,

You are defusing a bomb.

--------------------
Registered Linux User # 365113

divyashree · 01-15-2009, 02:01 AM

Quote:

Originally Posted by mcalizo

divyashree,

You are defusing a bomb.

--------------------
Registered Linux User # 365113

what bomb

nkarthik · 02-18-2009, 03:04 PM

Hey Tom,

Have you found a solution to this issue? i got the exact same problem in one of my host. SSH loging wont give password prompt, ILO Console logins will fail. After a ILO power reset, it works well. It has happened twice in the last 3 days. No useful information from logs.

Any help is greatly appreciated.

Thanks
Karthik
Systems Engineer