¿How can i remove blank lines between all lines in a long text file?
Example
WrongFile.txt :
Line 1
Line 2
Line 3
CorrectFile.txt :
Line 1
Line 2
Line 3
Thanks in advance
:confused: (4 Replies)
Hi there,
I want to trim space between lines in unix.
I have a file named abc.txt with 2,00,000 lines.But useful are only a few. Please tell me how to delete the blank lines.:o (1 Reply)
I have a file with the below data, i would like to remove the end blank lines with no data. I used the below commands but could not able to succeed, could you please shed some light.
Commands Used:
sed '/^$/d' input.txt > output.txt
grep -v '^$' input.txt > output.txt
input.txt file... (5 Replies)
I have joined 2 files. Join command worked fine.
but the result showing extra blank lines. I tried to remove blank spaces by using awk (-- -42 RS= ORS="\n\n" file.txt) and sed (sed '/^ *$/d' file.txt)commands but didn't remove any
Any suggestions plz:D
123 tab .......
......tab .......234... (3 Replies)
Hi Guys,
I have been trying to remove blank lines from a file with no success. I tried using all the following options on the file:
tr -s '\n' < abc.txt
grep -v "^$" abc.txt
sed '/^$/d' abc.txt
sed '/./!d' abc.txt
awk '/./' abc.txt
The file is a text file. (11 Replies)
I really hope someone can help me with this. I have several php files from a forum that I run, that now for some reason have blank lines after every line. Is there an easy way to make a script that does the following:
* If there are consecutive blank lines, delete all of them except one.
* If... (9 Replies)
Hi,
I'm not a expert in shell programming, so i've come here to take help from u gurus.
I'm trying to tailor a csv file that i got to make it work for the LOAD FROM command.
I've a datatable csv of the below format -
--in file format
xx,xx,xx ,xx , , , , ,,xx,
xxxx,, ,, xxx,... (11 Replies)
Hi,
I am facing a problem related to removing blank lines from a text document.
Input
Error 17-05-2011 11:01:15 VisualSVN Server 2.1 1001
The following information was included with the event:
line3
line4
Error 17-05-2011 11:00:25 VisualSVN Server 2.1 ... (13 Replies)
When I 'vi' my test file I see some blank lines. However once I do :set list to display hidden characters, I see the empty lines literally like this:
^I$
How do I remove them? I cannot find a regex to match them. (3 Replies)
Hi,
Which option is used to remove blank lines in VI (AIX). ?
Regards,
Siva (6 Replies)
Discussion started by: ksgnathan
6 Replies
LEARN ABOUT DEBIAN
prunehistory
PRUNEHISTORY(8) System Manager's Manual PRUNEHISTORY(8)NAME
prunehistory - remove file names from Usenet history file
SYNOPSIS
prunehistory [ -f filename ] [ -p ] [ input ]
DESCRIPTION
Prunehistory modifies the history(5) text file to ``remove'' a set of filenames from it. The filenames are removed by overwriting them
with spaces, so that the size and position of any following entries does not change.
Prunehistory reads the named input file, or standard input if no file is given. The input is taken as a set of lines. Blank lines and
lines starting with a number sign (``#'') are ignored. All other lines are should consist of a Message-ID followed by zero or more file-
names.
The Messge-ID is used as the dbz(3) key to get an offset into the text file. If no filenames are mentioned on the input line, then all
filenames in the text are ``removed.'' If any filenames are mentioned, they are converted into the history file notation. If they appear
in the line for the specified Message-ID then they are removed.
Since innd(8) only appends to the text file, prunehistory does not need to have any interaction with it.
OPTIONS -p Prunehistory will normally complain about lines that do not follow the correct format. If the ``-p'' flag is used, then the program
will silently print any invalid lines on its standard output. (Blank lines and comment lines are also passed through.) This can be
useful when prunehistory is used as a filter for other programs such as reap.
-f The default name of the history file is /var/lib/news/history; to specify a different name, use the ``-f'' flag.
EXAMPLES
It is a good idea to delete purged entries and rebuild the dbz database every so often by using a script like the following:
ctlinnd throttle "Rebuilding history database"
cd /var/lib/news
awk 'NF > 2 {
printf "%s %s %s", $1, $2, $3;
for (i = 4; i <= NF; i++)
printf " %s", $i;
print "
";
}' <history >history.n
if makehistory -r -f history.n ; then
mv history.n history
mv history.n.pag history.pag
mv history.n.dir history.dir
else
echo 'Problem rebuilding history; old file not replaced'
fi
ctlinnd go "Rebuilding history database"
Note that this keeps no record of expired articles.
HISTORY
Written by Rich $alz <rsalz@uunet.uu.net> for InterNetNews. This is revision 1.9, dated 1996/10/29.
SEE ALSO dbz(3), history(5), innd(8).
PRUNEHISTORY(8)