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NNGOBACK(1)		    General Commands Manual		   NNGOBACK(1)

       nngoback	- make news articles unread on a day-by-day basis (nn)

       nngoback	[ -NQvi	] [-d] days [ group ]...

       nngoback	will rewind the	.newsrc	record file of nn(1) one or more days.
       It can be used to rewind	all groups, or only a specified	set of groups.
       In  other  words, nngoback can mark news	articles which have arrived on
       the system during the last days days unread.

       Only subscribed groups that occur in the	current	presentation  sequence
       are  rewound.  That means that if no group arguments are	specified, all
       groups occurring	in the sequence	defined	in the init file will  be  re-
       wound.	Otherwise, only	the groups specified on	the argument line will
       be rewound.

       When a group is rewound,	the information	 about	selections,  partially
       read  digests  etc.  are	 discarded.  It	will print notifications about
       this unless the -Q (quiet) option is used.

       If the -i (interactive) option is specified, nngoback will  report  for
       each  how  many articles	can be marked unread, and ask for confirmation
       before going back in that group.

       If the -v (verbose) option is specified,	nngoback will report how  many
       articles	are marked unread.

       If  the	-N  (no-update)	option is specified, nngoback will perform the
       entire goback operation,	but not	update the .newsrc file.

       If you are not up-to-date with your news	 reading,  you	can  also  use
       nngoback	 to catch up to	only have the last few days of news waiting to
       be read in the following	way:
	    nn -a0
	    nngoback 3
       The nn command will mark	all articles in	all groups as read (answer all
       to  the	catch-up question.)  The following nngoback will then make the
       last three days of news unread again.


       nngoback	0
	      Mark the articles	which have arrived today as unread.

       nngoback	1
	      Mark the articles	which have arrived yesterday and today as  un-

       nngoback	6
	      Mark the articles	which have arrived during the last week	as un-

       You cannot go more than 14 days back with nngoback.   (You  can	change
       this limit as described below.)

       It  is  a prerequisite for the use of nngoback that the script back_act
       is executed at an appropriate time once	(and  only  once)  every  day.
       Preferably this is done by cron right before the	bacth of news for `to-
       day' is received.  back_act will	maintain copies	of the active file for
       the last	14 days.

       Optionally,  the	 back_act  program accepts a single numerical argument
       specifying how many copies of the active	file it	should maintain.  This
       is  useful  if news is expired after 7 days, in which case keeping more
       than 7 days of active file copies is wasteful.

       ~/.newsrc	    The	record of read articles.
       ~/.newsrc.goback	    The	original rc file before	goback.
       $db/active.N	    The	N days `old' active file.
       $master/back_act	    Script run by cron to maintain old active files.

       nn(1), nncheck(1), nngrab(1), nngrep(1),	nnpost(1), nntidy(1)
       nnadmin(1M), nnusage(1M), nnmaster(8)

       nngoback	does not check the age of the  `old'  active  files;  it  will
       blindly	believe	 that active.0 was created today, and that active.7 is
       really seven days old!  Therefore, the back_act script  should  be  run
       once and	only once every	day for	nngoback to work properly.

       The days	are counted relative to	the time the active files were copied.

       Kim F. Storm, Texas Instruments A/S, Denmark

4th Berkeley Distribution	  Release 6.6			   NNGOBACK(1)


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