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Full Discussion: find and replace a string in a file without the use of temp file
Top Forums Shell Programming and Scripting find and replace a string in a file without the use of temp file Post 302343311 by raghutapal on Wednesday 12th of August 2009 06:31:53 AM
Old 08-12-2009
find and replace a string in a file without the use of temp file
Hi -

I am looking for a replacing a string in a in multiple *.sql files in directory with a new string without using a temporary file

Normally I can use sed command as below

for W in ls `FILE*.sql`
do
sed 's/OLD/NEW/g' $W > TEMPFILE.dat
mv TEMPFILE.dat $W
done

But Here in my scenario I do not want to make use of a temporary file ,rather I would like to directly replace the string in the original files itself.

Please suggest me any command or approach

Thanks
Raghu
 

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LEARN ABOUT LINUX

unknown

UNKNOWN(1)						      General Commands Manual							UNKNOWN(1)

NAME

       unknown - identify possible genotypes for unknowns

SYNOPSIS

       A program to rapidly identify which genotypes are possible for individuals typed as unknowns in the input pedigree.

       unknown [ -cl ]

DESCRIPTION

       unknown infers possible genotypes and mating combinations for parents with unknown genotypes for ilink(1), mlink(1) and linkmap(1).

OPTIONS

       -c     Use conditional allele frequencies.

       -l     Choose a good set of loop breakers automatically.

RETURN VALUE

       0     Successful completion

ERRORS

       10    File not found
       255   Failure

EXAMPLES

       Normally, unknown(1) is run immediately prior to its sister programs, ilink(1), mlink(1) and linkmap(1), like this:

       unknown
       mlink

FILES

       unknown(1) reads the two files pedfile.dat and datafile.dat as its own input and produces various temporary files that are used as input to
       the next program. These temporary files are ipedfile.dat, upedfile.dat, speedfile.dat and newspeedfile.dat.

NOTES

       unknown(1) is part of the FASTLINK package, which is a re-implementation of the LINKAGE suite  of  computer  tools  that  help  investigate
       genetic linkage as first proposed G.M. Lathrop, J.M. Lalouel, C. Julier, and J. Ott.

AUTHORS

       Dylan Cooper, Alejandro Schaffer, and Tony Schurtz based on work originally by Jurg Ott, Ph.D, et. al.

       This manual page was written by Elizabeth Barham <lizzy@soggytrousers.net> for the Debian GNU/Linux system (but may be used by others).

WORD-WIDE-WEB
       http://www.ncbi.nlm.nih.gov/CBBResearch/Schaffer/fastlink.html

SEE ALSO

       ilink(1), linkmap(1), lodscore(1), mlink(1).

								  April 15, 2003							UNKNOWN(1)
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