Adding a header to a log file


 
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# 1  
Old 05-27-2010
Adding a header to a log file

Hello,
I’m trying to add a row that will server as the header for a space separated file.
1-I have a number of files save in a directory
2- grep text path/*.log > newfile
newfile looks like this

Field1 Field2 Field3 Field4
Field1 Field2 Field3 Field4
Field1 Field2 Field3 Field4
Field1 Field2 Field3 Field4
This is fine as data is concerned.
However, I want to add or append newfile with a header (row1) so that it will look like this

Header1 Header2 Header3 Header4
Field1 Field2 Field3 Field4
Field1 Field2 Field3 Field4
Field1 Field2 Field3 Field4
Field1 Field2 Field3 Field4

Your help will be appreciated

Last edited by rene reivera jr; 05-27-2010 at 12:14 AM.. Reason: wrong format
# 2  
Old 05-27-2010
Code:
echo "Header1 Header2 Header3 Header4" > newfile1
cat newfile >>newfile1
cp newfile1 newfile

This User Gave Thanks to amitranjansahu For This Post:
# 3  
Old 05-27-2010
If you don't know the number of columns...
Code:
awk 'NR==1{for(i=0;++i<=NF;) printf (i==NF?"Header" i RS:"Header" i FS)}1' infile

This User Gave Thanks to malcomex999 For This Post:
 
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