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Full Discussion: Usage of grep '^$1' filename
Top Forums UNIX for Dummies Questions & Answers Usage of grep '^$1' filename Post 302952576 by okkadu on Thursday 20th of August 2015 01:22:15 AM
Old 08-20-2015
Usage of grep '^$1' filename

There is a file name list_filenames.dat, this has all the list of all files I need to encrypt, I did not understand what the following syntax is doing:

Code:
grep -s "^$1" list_filenames.dat

, when I manually run this command it just returns all the lines, what is the usage of this ? can someone explain?

Last edited by Don Cragun; 08-20-2015 at 03:55 AM.. Reason: Add CODE and ICODE tags.
 

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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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