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Full Discussion: Strange error: grep does not read from file
Top Forums UNIX for Dummies Questions & Answers Strange error: grep does not read from file Post 302557015 by FelipeAd on Tuesday 20th of September 2011 09:56:07 AM
Old 09-20-2011
Strange error: grep does not read from file
I have two files
file1.txt
Code:
angie
mary
susan

file2.txt
Code:
angie blond
mary brunnet
susan red
christine black

I want to get this output
Code:
angie blond
mary brunnet
susan red

I write
Code:
grep --file=file1.txt file2.txt

and i get no results

i also wrote
Code:
cat file1.txt|while read line file1.txt;do grep "$line" file2.txt;done

again no results

I tried
Code:
while read line file1.txt;do echo -e "$line";done

nothing

but when i write
Code:
while read line;do echo -e "$line";done<file1.txt

it reads the lines


I don't understand that, why it does not read the input files inside the code?

If i solve this i will be able to run the first command, right?
 

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LEARN ABOUT PLAN9

zcmp

ZDIFF(1)						      General Commands Manual							  ZDIFF(1)

NAME

       zcmp, zdiff - compare compressed files

SYNOPSIS

       zcmp [ cmp_options ] file1 [ file2 ]
       zdiff [ diff_options ] file1 [ file2 ]

DESCRIPTION

       Zcmp  and  zdiff are used to invoke the cmp or the diff program on files compressed via gzip.  All options specified are passed directly to
       cmp or diff.  If only file1 is specified, it is compared to the uncompressed contents of file1.gz.  If two files are specified, their  con-
       tents  (uncompressed  if  necessary)  are  fed to cmp or diff.  The input files are not modified.  The exit status from cmp or diff is pre-
       served.

SEE ALSO

       cmp(1), diff(1), zmore(1), zgrep(1), znew(1), zforce(1), gzip(1), gzexe(1)

BUGS

       Messages from the cmp or diff programs may refer to file names such as "-" instead of to the file names specified.

																	  ZDIFF(1)
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