Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

how to get the blank line number of a file?

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting how to get the blank line number of a file?
# 1  
Old 05-20-2009
how to get the blank line number of a file?
I want to get the blank line number of a file.
example:
9000|9000|WW|1|1|SL|472|472|LC|2272|1072|MTY|niceDay

9000|9000|WW|1|1|SL|470|470|MC|1270|1172|MPVT|nice

9000|9000|WW|1|1|SL|472|472|LC|1072|1672|MBD|Sonice

9000|9000|WW|1|1|SL|473|473|LF|1173|1173|MTY|nice666

I want to get the result like this:
2
4
6

Thanks!
# 2  
Old 05-20-2009
if you have Python
Code:
#!/usr/bin/env python
for n,line in enumerate(open("file")):
    if line.strip()=="": print n+1

output
Code:
# ./test.py
2
4
6

with awk
Code:
# awk '/^$/{print NR}' file
2
4
6

# 3  
Old 05-20-2009
this will do
Code:
awk '/^$/{print NR}' filename

# 4  
Old 05-20-2009
The same thing with sed :
Code:
sed -n '/^$/=' filename

Jean-Pierre.
# 5  
Old 05-20-2009
It works.
Thank you so much!
# 6  
Old 05-20-2009
And then some more:

Code:
perl -ne '{print $.,"\n" if /^$/}' <file>

tyler_durden
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

In a file, replace blank line by the last line not blank above

Dear All, In a CSV file, say that a given column has been extracted. In that column, information is missing (i.e. blank lines appear). I would like to replace the blank lines by the last valid line (not blank) previously read. For example, consider the extract below: 123 234 543 111... (7 Replies)
Discussion started by: bagvian
7 Replies

2. UNIX for Dummies Questions & Answers

Split file based on number of blank lines

Hello All , I have a file which needs to split based on the blank lines Name ABC Address London Age 32 (4 blank new line) Name DEF Address London Age 30 (4 blank new line) Name DEF Address London (8 Replies)
Discussion started by: Pratik4891
8 Replies

3. Shell Programming and Scripting

replace blank line number

hlow all i need help how can i replace blank number with awk input.txt 300::|355264313178490 301::|358814003239510 302::|358316038113400 303::|357954002633660 304::|354072040694090 305::|356956015214190 306::|352943020525180 307::|359574033836610 308::|381810990023580 so will be like... (4 Replies)
Discussion started by: zvtral
4 Replies

4. UNIX for Dummies Questions & Answers

How to read contents of a file from a given line number upto line number again specified by user

Hello Everyone. I am trying to display contains of a file from a specific line to a specific line(let say, from line number 3 to line number 5). For this I got the shell script as shown below: if ; then if ; then tail +$1 $3 | head -n $2 else ... (5 Replies)
Discussion started by: grc
5 Replies

5. Shell Programming and Scripting

Insert blank line in a file

I have a file with data as below : Heading 1 ------------- Heading 1 data1 Heading 1 data2 Heading 1 data3 Heading 1 data4 Heading 2 ------------- Heading 2 data1 Heading 2 data2 Heading 2 data3 Heading 2 data4 Heading 3 ------------- Heading 3 data1 Heading 3 data2 Heading 3... (2 Replies)
Discussion started by: yoursdivu
2 Replies

6. Shell Programming and Scripting

Replace two blank line with a single blank line

Hi Guys, I have a file in which each set of records are separated by two blank line. I want to replace it with a single blank line. Can you guys help me out? Regards, Magesh (9 Replies)
Discussion started by: mac4rfree
9 Replies

7. Shell Programming and Scripting

how to replace a line in file with blank line

Hi I nned cmd to which will help me to replace a line in file with blank line e.g. file1 a b c d e after running cmd I shud get file1 b c d e (5 Replies)
Discussion started by: tarunn.dubeyy
5 Replies

8. Shell Programming and Scripting

Remove last blank line of file

I have a number of files (arranged in directories) which have last line blank, I am trying to synchronize my code with other env and due to this blank lines, all files error out as different although only difference is that of balnk line at end of file. Is there a way I can recursively... (2 Replies)
Discussion started by: ruchimca
2 Replies

9. Shell Programming and Scripting

ignoring blank line in a file

i have a file called Cleaner1.log . This files have some blank lines also.My requirement is that it should ignore the blank lines and give me the lines that contain some data. I m using this logic in a script: below the contents of file : Maximum Time Taken for Processing(Failed) RR... (4 Replies)
Discussion started by: ali560045
4 Replies

10. Shell Programming and Scripting

how to get the data from line number 1 to line number 100 of a file

Hi Everybody, I am trying to write a script that will get some perticuler data from a file and redirect to a file. My Question is, I have a Very huge file,In that file I have my required data is started from 25th line and it will ends in 100th line. I know the line numbers, I need to get all... (9 Replies)
Discussion started by: Anji
9 Replies
Login or Register to Ask a Question