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Full Discussion: Grep command to ignore line starting with hyphen
Top Forums Shell Programming and Scripting Grep command to ignore line starting with hyphen Post 302947554 by Aia on Thursday 18th of June 2015 07:02:04 PM
Old 06-18-2015
Code:
for TEST in `cat $FILE | grep -E -v '#|/+' | awk '{FS=":"}NF > 0{print $1}'`

The thing is that grep does not need cat.
grep pattern $FILE can read the file for itself.
awk does not need cat or grep. awk can exclude as well on its own.
Code:
awk '$0 !~ /pattern to exclude/ {action}' $FILE

As an example if you want to exclude all these character in the beginning of a line: `#/-+'
Code:
awk '$1 ~ /^[^-#/+]/' $FILE

Last edited by Aia; 06-18-2015 at 08:12 PM.. Reason: Adds beginning of the line anchor
 

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LEARN ABOUT PLAN9

zgrep

ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep	options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other options specified are passed directly to grep.  If no file is specified,  then  the
       standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and fed to grep.

       If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

																	  ZGREP(1)
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