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UNIX for Dummies Questions & Answers
zombie program
Post 31328 by merlin on Wednesday 6th of November 2002 06:38:06 AM
11-06-2002
zombie program
When you run a ps -ef and if the status is a Z (zombie) does that mean the same as not responding? (Like a windows machine).
Also has anyone here heard of the program called 'top' (I've found it on our Solaris 7 machines) If you have you might be able to help me. I need to know if there is a way to test the status of a machine or program from the top command.
Might help if I explian what I'm trying to do.
I need to write a script/program to detect when a program isn't running and then restart that program. BUT sometimes it's not the program that is responding it can sometimes be the network port and just gone in a zombie mode and it's detected and all but wont receive info or send any through that port. I need to be able to detect that as well and reset that port if that is the problem.
If anyone has any idea's how this can be done or help with the above. Thanks so much if you can help
Also has anyone here heard of the program called 'top' (I've found it on our Solaris 7 machines) If you have you might be able to help me. I need to know if there is a way to test the status of a machine or program from the top command.
Might help if I explian what I'm trying to do.
I need to write a script/program to detect when a program isn't running and then restart that program. BUT sometimes it's not the program that is responding it can sometimes be the network port and just gone in a zombie mode and it's detected and all but wont receive info or send any through that port. I need to be able to detect that as well and reset that port if that is the problem.
If anyone has any idea's how this can be done or help with the above. Thanks so much if you can help
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LEARN ABOUT ULTRIX
talkd
talkd(8c) talkd(8c) Name talkd - inter-terminal communications server Syntax /etc/talkd Description The program is the server for the program. The server provides a rendezvous method for the requesting (possibly remote) and the local responding The server is invoked by when it receives a packet on the port indicated in the talk service specification. Restrictions The server does not strictly follow network byte order in its packet format and may have difficulty in talking with implementations of on other architectures that do not take this into account. The version of released with ULTRIX V3.0 uses a protocol that is incompatible with the protocol used in earlier versions. Starting with ULTRIX V3.0, the program communicates with other machines running ULTRIX, V3.0 (and later), and machines running 4.3 BSD or versions of UNIX based on 4.3 BSD. The command is not 8-bit clean. Typing in DEC Multinational Characters (DECMCS) causes the characters to echo as a sequence of a carets (^) followed by the character represented with its high bit cleared. This limitation makes unusable if you want to communicate using a language which has DECMCS characters in its alphabet. See Also talk(1), services(5), inetd(8c), ntalkd(8c) talkd(8c)