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Full Discussion: Discover the last user in a group to edit a file?
Top Forums UNIX for Dummies Questions & Answers Discover the last user in a group to edit a file? Post 302489707 by Perderabo on Friday 21st of January 2011 10:49:51 AM
Old 01-21-2011
I would put the file under rcs control. The file would normally be read-only. A particular user would check out the file for updating. When finished he checks the file back in and updates the read-only version. The check-in process records who is checking the file in and the user can even add a comment describing the change. Only one user can have have the file checked out for updating at a time, so there is no chance of two users stepping on each other. Did a user screw up the file? No problem, just check out an earlier version and install that. The only problem is that users need the discipline to use it.

Sun does not add rcs to Solaris by default but you can get it from Sunfreeware - Free and Open Source Software (FOSS) for Sun Microsystem's Solaris. Solaris does have sccs which is an older package similiar to rcs. There are also more advanced packages out there like cvs. Stuff like this is how dozens of programmers can write an operating system without stepping on each other.
 

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LEARN ABOUT OPENSOLARIS

patchmedia

patchmedia(1M)						  System Administration Commands					    patchmedia(1M)

NAME

       patchmedia - modify Solaris media with patches and packages

SYNOPSIS

       /usr/bin/patchmedia  -d media-root [-v] [-o iso] [-l label]
	    pkg_or_patch [pkg_or_patch ...]

DESCRIPTION

       The  patchmedia utility takes a list of patches and packages as input and updates the install miniroot in media-root (the root directory of
       an on-disk image of a Solaris installation media) to include the specified patches and packages. These patches and packages are also placed
       in a subdirectory called DU under the Solaris install image. For example:

	 media-root/Solaris_10/DU

       When  booting a system from the updated media, the patches and packages will be part of the booted Solaris image. They will also be applied
       to the target system being installed at the end of the installation process.

       If -o is specified, a bootable ISO image is created in the file media.iso that contains the Solaris install media. The ISO image  can  then
       be burned onto a CD/DVD with utilities such as cdrw(1) or cdrecord(1). (The latter is not a SunOS man page.)

OPTIONS

       The following options are supported:

       -d media-root

	   Top-level directory of on-disk image of Solaris installation media. This is option must be specified.

       -o iso

	   Create a Solaris ISO image of media-root.

       -l label

	   Label/volume name of the ISO image (if -o option is specified). If -o is not specified, the name of Solaris directory under media-root,
	   for example, Solaris_10, will be used.

       -v

	   Verbose. Multiple -v options increase verbosity.

OPERANDS

       The following operands are supported:

       pkg_or_patch [pkg_or_patch ...]

	   One or more patches or packages (you can have both patches and packages in a single command) with which the Solaris installation  media
	   media-root will be updated.

EXAMPLES

       Example 1 Updating a Solaris Install Image with Patch and Package

       The following command updates the Solaris install image in s10u1 by adding patch 123456-07 and package SUNWfoo.

	 # /usr/bin/patchmedia -d s10u1 SUNWfoo 123456-07

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Committed 		   |
       +-----------------------------+-----------------------------+

SEE ALSO

       cdrw(1), mkcd(1M), attributes(5)

       mkisofs(8), (/usr/share/man/man8/mkisofs.8), in the  SUNWfsman package (not a SunOS man page)

SunOS 5.11							    29 Jul 2008 						    patchmedia(1M)
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