I have a file say abc.txt with following data (real data has many records,say around 200)
Sno | Name
1 | Jack
2 | Jill
3 | June
Now how do I append text to make my file look like this,
Sno | Name | Place
1 | Jack | Paris
2 | Jill | Paris
3 | June | Paris
I tried replacing globally ,but first line should be appended with different text.So please help me out guys.
Here are three options:
awk and its variants (gawk, mawk etc.):
awk '{if(NR==1){print $0,"| Place"} else{print $0,"| Paris"}}' file.txt
Perl:
perl -lne '$.==1 ? print "$_ | Place" : print "$_ | Paris"' file.txt
sed
sed '1 s/$/ | Place/; 1! s/$/ | Paris/' file.txt
gawk or mawk, it's any awk implementation, POSIX ones, and even the original awk from 1981
Commented
Sep 2, 2013 at 13:50
awk in the example and (g/m)awk in the header. Thanks.
1! better than 2,$? Is it just because it is shorter or is there a difference in the implementation?
For scripted "in-place" file editing, use ex:
printf '%s\n' '1s/$/ | Place/' '2,$s/$/ | Paris/' x | ex abc.txt
printf gives the commands to ex.1s performs the substitute on the first line only.2,$s performs the substitution on all other lines.x saves and exits.The $ in the regex means "end of line."
