sed question

[leonchik1976]

hi! how can i add a comment to specific line with sed?

[bkorb]

Read the sed man page about addressing particular lines.

sed '1s/xxx/yyy/'

[muon205]

Or, more explicitly, if you're trying to add a comment to the end of a line, and the comment symbol is a pound, try

sed "line#s/$/ # comment/" file1 > file2

where "line#" above is of course the number of the line you're trying to add a comment to and should be replaced by a number.