Create a Project

sfdx force:project:create -n projectname

Authenticate to Dev Hub

sfdx force:auth:web:login -d -a DevHub

Set as Default Devhub

sfdx force:config:set defaultdevhubusername=DevHub

Create a scratch org with alias testOrg

sfdx force:org:create -s -f config/project-scratch-def.json -a testOrg

Set an existing scratch org as default

sfdx force:config:set defaultusername=<username|alias>

Open the scratch org with alias 'testOrg' in browser

sfdx force:org:open -u testOrg

Convert source code to a package. Be ready to deploy to sandbox

sfdx force:source:convert -d mdapi/ --packagename package_name

Authenticate to Dev Hub

sfdx force:auth:web:login -d -a DevOrg

Deploy to connected environment without running test; wait 5mins for the report

sfdx force:mdapi:deploy -d mdapi/ -u devOrg -l NoTestRun -w 5

Data Export Commands

sfdx force:data:tree:export --query
"SELECT Id,Name,
(SELECT Name,Id FROM Contacts)
FROM Account" --prefix export-demo --outputdir data --plan

Create Second Generation Packaging

sfdx force:package2:create --name RecuritingApp --containeroptions Unlocked

Create a version of the package using the force:package2:version:create command

sfdx force:package2:version:create -d force-app

Install the package In PROD/Sandbox

sfdx force;package:install -i packageVersionId