I would like to delete the first 100 lines of a text file using sed. I know how delete to the first line by using:

```
sed '1d' filename

```

or the 100th line by typing 

```
sed '100d' filename

```

How do I specify a range? I thought something like this would work:

```
sed '1:100d' filename

```

However, this obviously didn't work. Can someone show me how to specify a range? Thanks in advance for your help.