Shell scripting :: comment N line in vi editor

mahabooba · 07-27-2006, 06:00 AM

Hi,
Using shell scripting how we can comment N line.
Please help me in this regard.

Thank and Regards,
Mahaboob

homey · 07-27-2006, 07:33 AM

I'm not sure which you're doing here.
In the vi editor, the command would be like

Code:

:3s/^/# /

Using sed would be something like

Code:

sed -i '3s/.*/# &/' file.txt

mahabooba · 07-28-2006, 12:58 AM

Thank you homey,
But How do I delete comments in Nth line.
Please do let me know.

-
Mahaboob

chrism01 · 07-28-2006, 02:50 AM

:3s/^#.*//
for line 3

homey · 07-28-2006, 05:58 AM

If you just want to delete the comments which have a space after them and not the words in that line,
For example:

this is line one
this is line two
# this is line three

in vi ...

Code:

:3s/^# //

Using sed...

Code:

sed -i '3s/^# //' file.txt

this is line one
this is line two
this is line three