I am trying to follow the [Trailhead module on CI](https://trailhead.salesforce.com/modules/sfdx_travis_ci/units/sfdx_travis_ci_wire_it) and [Salesforce DX](https://trailhead.salesforce.com/en/modules/sfdx_app_dev/units/sfdx_app_dev_setup_dx). I tried to push some of my Lightning components which depend on a managed package in App Exchange. I would like to know how to install a managed package using Salsforce DX CLI so that i can use that command in my `travis.YML` file for my CI integration.

Here is the script for my Travis file

```
sudo: true
dist: trusty
cache: false
env:
- URL=https://developer.salesforce.com/media/salesforce-cli/sfdx-linux-
amd64.tar.xz
before_install:

- export SFDX_AUTOUPDATE_DISABLE=true
- export SFDX_USE_GENERIC_UNIX_KEYCHAIN=true
- export SFDX_DOMAIN_RETRY=300
- wget -qO- $URL | tar xJf -
- "./sfdx/install"
- export PATH=./sfdx/$(pwd):$PATH
- sfdx update
- sfdx force:auth:jwt:grant --clientid $CONSUMERKEY --jwtkeyfile 
assets/server.key
--username $USERNAME --setdefaultdevhubusername -a DevHub
script:
- sfdx force:org:create -f config/project-scratch-def.json -s -a 
PackageInstallation
- sfdx force:org:list
- sfdx force:org:display
- sfdx force:user:password:generate -u PackageInstallation
- sfdx force:org:display
- sfdx force:org:open -u PackageInstallation
- sfdx force:source:push -u PackageInstallation
- sfdx force:apex:test:run -u PackageInstallation -c -r human

```

I get the following error as my components depend on the app exchange components:

> 
> No COMPONENT named markup://ldt:datatableDev found : 
> 
> 
>