sed '/^$/d' file > newfile
or
sed '/^[ \t]*$/d' file > newfile
The first one works for blank lines made of a newline character only.
Thank you for answer.
'\t' doesn't work for some reason, too!
That what I try to figured out: why it could be?
Removing empty lines works fine.
The [ \t] was my original attempt to do that and after that I start to search for different way to patterning the tab and found those macros: <spc>,<tab>, but that does not work for me for some reason.
I perfectly removing all 'blank' line with
Code:
nawk 'NF' file
Any advices why the tab specifiers could doesn't work for me?
Old versions of sed don't recognize "\t" as a tab, type between the brackets a <space> followed by <Ctrl-v> <TAB> to delete the lines with spaces or/and tabs:
The blank lines have other non-printing characters - not tabs.
try
Code:
od -c file | more
to see what other stuff is in there.
Thank you, jim: the 'od' is new for me and usefull command.
I have checked the file, but nothing extra is not found in the file
It seems our system grep and sed just old, as said Franklin52:
Quote:
Originally Posted by Franklin52
Old versions of sed don't recognize "\t" as a tab, type between the brackets a <space> followed by <Ctrl-v> <TAB> to delete the lines with spaces or/and tabs:
Code:
sed '/[ ]/d' file > newfile
Regards
Thank you, Franclin52.
It works in the way you show.
So, I make a note for myself that our system do not know those macros and I need to use Ctrl/v for that.
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