I want to append to a line number using sed

Question

I have a file that I need to append to certain lines.

I can get the line numbers and have been able to use sed to print the entry but not to append the entry.

All I need to do is something like

sed -n '$VAR s/$/,nosuid/' > to_file

Just can not get the syntax down.

Thank you.

Shell variables do not expand in single quotes. Assuming `$VAR` is a shell variable you need to use double quotes around it. `"$VAR s/$/,nosuid/"` or `"$VAR"' s/$/,nosuid/'` or similar. — Etan Reisner, Dec 01 '14 at 18:01
possible duplicate of [Expansion of variable inside single quotes in a command in bash shell script](http://stackoverflow.com/questions/13799789/expansion-of-variable-inside-single-quotes-in-a-command-in-bash-shell-script) — Etan Reisner, Dec 01 '14 at 18:03

Gilles Quenot · Answer 1 · 2014-12-01T19:28:32.090

0

Try doing this :

 sed "$VAR s/$/,nosuid/" > to_file

Like Etan Reisner said in the comments, the quotes should be double quotes.

edited Dec 01 '14 at 19:28

answered Dec 01 '14 at 18:03

Gilles Quenot

score 0 · Answer 2 · answered Dec 02 '14 at 06:24

0

This might work for you:

sed -n $VAR's/$/,nosuid/' > to_file

answered Dec 02 '14 at 06:24

potong

2 Answers2