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sencha fs web -p 80 start -map /path/to/webroot/

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defaults write com.apple.finder AppleShowAllFiles TRUE && killall Finder

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dokku config:set appname KEY=value

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sudo shutdown -h now

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sudo service apache2 restart

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//login to your droplet.

//1. output the hostname
hostname

//2. modify the hosts
nano /etc/host

//3. the first line in this file, should use the hostname on the end. For example: "Lee"
127.0.0.1 localhost localhost.domainname Lee

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https://www.digitalocean.com/community/tutorials/how-to-install-mongodb-on-ubuntu-14-04

//Check if mongo is running
service mongod status

//You can also stop, start, and restart MongoDB using the service command (e.g. service mongod stop, server mongod start).

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yo nodejs

//install modules globally
npm install packagename -g

//install modules and save in package.json
npm install packagename --save

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This trick involves refreshing the discoveryd service by unloading and reloading it with the launchctl command. 
This is a bit curious but apparently it works for some users, suggesting there could be an issue with discovery or resolving DNS on some Yosemite Macs. 
It’s certainly worth a try if the above tricks failed to resolve your wi-fi connectivity problems in OS X 10.10, as there are a fair amount of positive reports with this one:

Open Terminal (found in /Applications/Utilities/ or with Spotlight) and enter the following command:
`sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.discoveryd.plist`

Hit return and enter an admin password to use the sudo command
Now run the following command to reload discoveryd (this used to be called mDNSResponder)
`sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.discoveryd.plist`

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Listing running containers: dokku ps

To kill a container:
dokku kill <id-container>

https://docs.docker.com/articles/basics/