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no ssh access / vnc works but can't start new processes
trying to vnc i get:
ssh_exchange_identification: Connection closed by remote host
i can vnc into the machine, get a preexisting desktop, can browse files etc. but can't start new applications. for example, i go applications / system tools / terminal. the terminal apears to start in the task bar but then disapears. similarly i can't start it using the run application dialog.
the machine is running some server processes, including mysql, httpd, and these seem fine. a monitoring application also run on the server and posts to another host various stats, including cpu load and number of network connections, and both are reasonable.
lastly, one server process start new jvms as it processes remote requests (these are separate java processes) and judging from the application behaviour these start and terminate correctly.
So the system is operational (it's a 24/7 system) but not accessible via ssh anymore. nor can you look into it using vnc.
more info:
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$ cat /proc/version
Linux version 2.6.9-5.ELsmp (bhcompile@decompose.build.redhat.com) (gcc version 3.4.3 20041212 (Red Hat 3.4.3-9.EL4)) #1 SMP Wed Jan 5 19:30:39 EST 2005
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$ ssh -v remote_user@10.100.120.20
OpenSSH_4.3p1, OpenSSL 0.9.7g 11 Apr 2005
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to 10.100.120.20 [10.100.120.20] port 22.
debug1: Connection established.
debug1: identity file /home/user/.ssh/identity type -1
debug1: identity file /home/user/.ssh/id_rsa type -1
debug1: identity file /home/user/.ssh/id_dsa type -1
ssh_exchange_identification: Connection closed by remote host
[NOTE: the above, except the last line, is part of normal connection debug info]
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