MongoDB provides four packages

YUM: Yellowdog Updater Modified

• Install a package with YUM:

  sudo yum install <package name>
  sudo yum -y install <package name>
  

Edit ~/.bashrc

http_proxy=http://yourproxyaddress:prosyport
export http_proxy

It the proxy server requires login, using the following configuration

http_proxy=http://username:password@yourproxyaddress:proxyprot
export http_proxy

Chrome can use fonts over internet. There are a lot fonts we can use. I installed custom fonts because I couldn’t find a way let chrome to use Nerd Fonts over internet.

Create OS Recovery Media

1. Insert a USB stick 4GB or greater
2. Install Chromebook Recovery Utility extension for chrome browser
3. Launch Chromebook Recovery Utility and follow the guide to create OS Recovery Media

Note:
User still can issue shutdown command to shutdown the computer

1. Backup all file system
2. Backup database
3. Replace old domain to new domain in backup database file
4. If the home directory is different on new server, we need to replace the home directory value in database file as well. Also we need to use grep to find hardcode in backup files and fix it.

• Error: GitHub Metadata: No GitHub API authentication could be found. Some fields may be missing or have incorrect data.
  1. Create personal access token on Github
  2. Add the following code in .bash_profile

       export JEKYLL_GITHUB_TOKEN=<your token here>
     

  3. Run following commond or Logout and logon again.

       . ~/.bash_profile
     

Types of NoSQL Databases

• Document store types ( MongoDB and CouchDB)
• Key-Value store types ( Redis and Volgemort)
• Column store types ( Cassandra)
• Graph store types ( Neo4j and Giraph)

To run Docker inside LXD, we need to change the security.nesting as true.

lxc launch ubuntu-daily:16.04 docker -c security.nesting=true

or

lxc config set docker security.nesting true
lxc restart docker