topic Re: Delete in Operating System - Linux

Delete

Vanquish — Wed, 05 May 2004 11:25:55 GMT

Re: Delete

Vanquish — Wed, 05 May 2004 11:29:39 GMT

My bad
I want to delete 1st 2 lines and 1st empty space and last empty space in a text file
in a script.

ABCDEFG
-------
AANHITW
ABEAWGI
ABEGIGI

i dont need 1st 2 lines and remove spaces before and after each line.
does
sed /^\ d works and how

Thanks

Re: Delete

Stuart Browne — Wed, 05 May 2004 19:32:15 GMT

So let me get this straight. You've got a file with contents like:

+-- start here --+
LINE_OF_JUNK
---------
keepthis
keepthis
keepthis

+-- end here --+

You want to get rid of everything before, and including the '-----' line, and any blank lines. Yes?

Re: Delete

Kiyoshi Miyake — Wed, 05 May 2004 23:08:17 GMT

Hi,

sed '1,2d;s/ //g'

or

sed -n 's/ //g;3,$p'

thx.

Re: Delete

Francisco J. Soler — Thu, 06 May 2004 11:52:05 GMT

Hi,

Try this:

awk '{
if (NR>2) {
for (i=1;i<=NF;i++)
printf($i)
printf("\n")
}
}' text_file

Or the pipe format:

cat text_file | awk '{
if (NR>2) {
for (i=1;i<=NF;i++)
printf($i)
printf("\n")
}
}'

Or the script format, you must create a file (for example script.awk) with this content:

---- script.awk ----
{
if (NR>2) {
for (i=1;i<=NF;i++)
printf($i)
printf("\n")
}
}
------ end script.awk ----------

Now you can do:
awk -f script.awk text_file

Hope this helps.

Frank.

Re: Delete

Francisco J. Soler — Thu, 06 May 2004 12:39:43 GMT

Hi,
One appointment, with the awk solution, all spaces before and after the lines are removed but also removes all spaces between fields in the same line.

Frank.

Re: Delete

Hein van den Heuvel — Fri, 07 May 2004 15:08:45 GMT

Any spaces in the text posted to the forum get massacred. So please use a (.txt) file attachement to display an example of the expected input AND the desired output.

In perl the solution might be:

perl -e '<>;<>;while(<>){s/^\s+//;s/\s+$/\n/;print unless ($_ eq ""
)}' < old-file > new-file

in english:
read and forget a line
read and forget an other line
loop while lines
replace leading spaces with nothing
replace trailing spaces with a newline
print unless it is an empty line

Be sure to reply with attached test if this is not what you wanted.

hth,
hein.

Re: Delete

generic_1 — Fri, 07 May 2004 22:28:19 GMT

vi filename
dd
dd

:wq!

:)

Re: Delete

Paul Cross_1 — Tue, 11 May 2004 10:45:30 GMT

Jeff, my "d" finger hurt just reading that!

:)