Delete specific line number(s) from a text file using sed?

Question

I want to delete one or more specific line numbers from a file. How would I do this using sed?

Accepted Answer

If you want to delete lines from 5 through 10 and line 12th:

```
sed -e '5,10d;12d' file
```

This will print the results to the screen. If you want to save the results to the same file:

```
sed -i.bak -e '5,10d;12d' file
```

This will store the unmodified file as `file.bak`, and delete the given lines.

Note: Line numbers start at 1. The first line of the file is 1, not 0.

Solution