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Full Discussion: Question about I/O sources
Top Forums UNIX for Dummies Questions & Answers Question about I/O sources Post 302751081 by Don Cragun on Thursday 3rd of January 2013 06:49:11 AM
Old 01-03-2013
Quote:
Originally Posted by santiagorf
Hi all,
What is the difference between these two comands?
sed s/a/b/ <f1 >f2
sed s/a/b/ f1 >f2

Best,
santiagorf
The results from those two commands should be the same.

The difference between them is that in the first case, the shell opens f1 as standard input to be read by sed. In the second case, sed opens and reads f1 using a file descriptor that might or might not (but probably won't) be the standard input file descriptor for sed.
 

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fixnt(1)							      Debian								  fixnt(1)

NAME
fixnt - Filter for the Windows NT postscript printer driver. SYNOPSIS
fixnt < BADFILE.ps > GOODFILE.ps DESCRIPTION
The Windows NT postscript driver has a tendency to make broken postscript files, that are incompatible with psutils. fixnt is a filter that fixes these problems, allowing the use of psnup(1). The filter takes the broken postscript file on stdin, and outputs a fixed postscript file on stdout. It has no other form for invocation and takes no options on the command-line. OPTIONS
fixnt takes no options. BUGS
fixnt does not check for NTPSOct94. For a workaround, use a sed(1) command to replace 'NTPSOct94' with 'NTPSOct95', like so: sed 's/NTPSOct94/NTPSOct95/g' This is particularly important for Windows NT 3.5 users. AUTHOR
fixnt was written by Holger Bauer <Holger.Bauer@topmail.de>, Michael Rath <rath@itsm.uni-stuttgart.de>, and Akim Demaille <demaille@inf.enst.fr>. REPORTING BUGS
Report bugs to the Authors, but avoid sending large postscript files. Patches are always welcome; send to <bauer@itsm.uni-stuttgart.de>. SEE ALSO
psnup(1), sed(1) a2ps February 2003 fixnt(1)
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