ZFS Dataset is Busy Solution

Solution on Ubuntu:
Using the following command and find with process is holding the dataset.

grep zroot/2013-10-15T065955229209 /proc/*/mounts

note: replace zroot/2013-10-15T065955229209 as your mount point.

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Install Linux On A Chromebook

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
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Move Wordpress to new server with new domain

  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.
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Fix Github pages issues

  • 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
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NoSQL Databases

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)
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