WC on Unix - Count Lines 1

[saw15]

Good day ..

Using VI, I vi a file and while in it type the following command:

:1,2000 w newfilename <enter>

I then exit VI and ls -l. I then wc newfilename and get the following results:

2000 18360 418000 newfilename

What is the 2000 for that I selected above? I need to pick the first 2000 lines, the 2000 listed appears to be words.

What about the 18360 and 418000?

Help is appreciated.

 

[patel]

This is the format of wc by default
<newlines>, <words>, <bytes>, <file>
so 2000=lines
18????=words
41????=bytes

If you want to transfer 1-2000 line form file1 to file2 then
#head -2000 file1 > file2

Patel

 

[saw15]

Thanks for the feedback ... another quick question.

Can you take the last 1000 lines? Take it from descending order instead of asc?

 

[RobJordan]

#!/usr/bin/ksh

MY_FILE=abc.xyz
COUNTER=0
NUM_LINES=`cat $MY_FILE|wc -l`
LINE_NUMBER=$NUM_LINES

until [ $LINE_NUMBER -eq 0 ]
do
LINE=`sed -n &quot;${LINE_NUMBER}p&quot; $MY_FILE`
echo $LINE
LINE_NUMBER=`expr $LINE_NUMBER - 1`
COUNTER=`expr $COUNTER + 1`
if [ $COUNTER -eq 2000 ]
then
exit
fi
done

Didn't have time to test this,
but I think it should work.
It should print up to the last 2000 lines backwards. Robert G. Jordan
Unix Sys Admin
Sleepy Hollow, Illinois U.S.A.

http://www.InYourMind.com

FREE Unix Scripts

 

[patel]

Hi
It is easy too.
#tail -1000 file1 > file2
#cat file2 |sort -r > file3

Patel

 

[tdatgod]

Hi,
I have run into issues with TAIL having a limited buffer and that even though I ask for the last 1000 lines, I only get the last 500 lines or so because it can only hold 4096 characters in its buffer.

Just something to be aware of when using Tail.