so many unices Post: 302077661

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Top Forums UNIX for Dummies Questions & Answers so many unices Post 302077661 by tayyabq8 on Saturday 24th of June 2006 09:26:42 AM

06-24-2006

Forum Advisor

Ok, I got your points Amro, I want to ask few questions here, I hope these are not irrelevant. In spite of extra storage, hardware compatibility issues and many extra features like you mentioned hot-swapping capabilities.

1) Do all these UNiXES & GNU/LINUX differ at kernel level? Suppose if a small business wants to go for some standard solution like:

File Server, Domain Name Server, Mail Server or Web Server. Should they go for a commercial version or Fedora or any other free availble UNIX flavor will fulfil their requirements, because I dont see any difference

2) Does UNIX & GNU/LINUX kernel differ or Linus Torvald inherited same code from UNIX kernel or he designed his own code, I really dont know about that.

3) If original UNIX kernel code was written at Bell Labs then from where these free UNIX distributions have been evolved? Did they distribute their code to different Universities and organizations? Like BSD?

4) One stupid question, what was the first shell to interact with UNIX kernel, was it sh? or how inventors of UNIX and other experts were interacting with UNIX kernal during initial days?

Waiting for your valuable comments.

Regards,
Tayyab

tayyabq8

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LEARN ABOUT OPENDARWIN

vllog

VLLOG(5)							AFS File Reference							  VLLOG(5)

NAME

       VLLog - Traces Volume Location Server operations

DESCRIPTION

       The VLLog file records a trace of Volume Location (VL) Server (vlserver process) operations on the local machine and describes any error
       conditions it encounters.

       If the VLLog file does not already exist in the /var/log/openafs directory when the VL Server starts, the server process creates it and
       writes initial start-up messages to it. If there is an existing file, the VL Server renames it to VLLog.old, overwriting the existing
       VLLog.old file if it exists.

       The file is in ASCII format. Administrators listed in the /etc/openafs/server/UserList file can use the bos getlog command to display its
       contents. Alternatively, log onto the server machine and use a text editor or a file display command such as the UNIX cat command. By
       default, the mode bits on the VLLog file grant the required "r" (read) permission to all users.

       The VL Server records operations only as it completes them, and cannot recover from failures by reviewing the file. The log contents are
       useful for administrative evaluation of process failures and other problems.

       The VL Server can record messages at three levels of detail. By default, it records only very rudimentary messages. To increase logging to
       the first level of detail, issue the following command while logged onto the database server machine as the local superuser "root".

	  # kill -TSTP <vlserver_pid>

       where <vlserver_pid> is the process ID of the vlserver process, as reported in the output from the standard UNIX ps command. To increase to
       the second and third levels of detail, repeat the command.

       To disable logging, issue the following command.

	  # kill -HUP <vlserver_pid>

       To decrease the level of logging, first completely disable it and then issue the "kill -TSTP" command as many times as necessary to reach
       the desired level.

SEE ALSO

       UserList(5), bos_getlog(8), vlserver(8)

COPYRIGHT

       IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved.

       This documentation is covered by the IBM Public License Version 1.0.  It was converted from HTML to POD by software written by Chas
       Williams and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.

OpenAFS 							    2012-03-26								  VLLOG(5)