script problem

[neocosmic]

how can i put a number in front of each line in a given file?

[Luciano Carvalho]

hi,

when you are usign "vi" editor, you can use the "set number" command to numer each line of your file.

regards

[John Poff]

Hi,

Here are some ways to do it in sed:

# number each line of a file (simple left alignment). Using a tab (see
# note on '\t' at end of file) instead of space will preserve margins.
sed = filename | sed 'N;s/\n/\t/'

# number each line of a file (number on left, right-aligned)
sed = filename | sed 'N; s/^/ /; s/ *\(.\{6,\}\)\n/\1 /'

# number each line of file, but only print numbers if line is not blank
sed '/./=' filename | sed '/./N; s/\n/ /'


Courtesy of Eric Pement's wonderful One Liners for Sed.

JP

[John Meissner]

If you mean while you are vi'ing the file you can hit escape then ":" and type "set nu" This will number each line. if you want to add actual numbers into the file you can do this:

count=1
cat file |
while read line
do
echo $count $line
((count=$count+1))
done

if you want to save this output you can send it to another file and rename it back to the original if you so wish.

[Jared Middleton]

Here are a couple quick-and-dirty methods:

$ cat | grep -n ""
1:myline1
2:myline2
3:myline3

$ cat -n
1 myline1
2 myline2
3 myline3

-Jared

[Vitaly Karasik_1]

you can do it with

pr -n

too

Regards,
Vitaly

[Vitaly Karasik_1]

two more ways from my collegaus:

1) Tom Rosenfeld
And don't forget nl(1) the Number Line utility written for just this problem! try
$ nl files...
or see the man page for all the options.


2) Jonathan rodin
Just in case people get bored of using all the other ways, there's also:

less -N