> For the complete documentation index, see [llms.txt](https://ploegert.gitbook.io/til/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ploegert.gitbook.io/til/tools/sed/apply-multiple-substitutions-to-the-input.md).

# Apply Multiple Substitutions To The Input

You can apply multiple substitutions to the input of a `sed` command a couple ways.

One of those ways is to use the `-e` flag multiple times to define substitutions that should be *appended* to the `sed` script.

```bash
$ echo 123 | sed -e 's/3/three/' -e 's/1/one/'
one2three
```

Another way is to define a single string as the `sed` script and separate each substitution with a `;` (semicolon).

```bash
$ echo 123 | sed 's/3/three/; s/1/one/'
one2three
```

Each of these will run each substitution in the `sed` script sequentially for each line in the input.