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Top Forums Shell Programming and Scripting Can't remove blank lines from a file Post 302396484 by Corona688 on Thursday 18th of February 2010 02:30:54 PM
Old 02-18-2010
You realize of course that none of the commands you've given actually edits the given file. Just checking the obvious here. Smilie

Since this is cygwin another culprit may be the CPM-style carriage returns Windows text files have. Annoyingly, plenty of things can't actually match a carriage return.

Code:
tr -d '\r' < input | grep -v "^$" > output

 

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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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