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---
- name: Define a Simple Dictionary
  hosts: localhost
  gather_facts: no
  vars:
    my_dict:
      key1: value1
      key2: value2
      key3: value3
  tasks:

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---
- name: Check if Variable is a Dictionary
  hosts: localhost
  gather_facts: no
  vars:
    var1:
      key1: value1
      key2: value2
    var2: "Not a dictionary"
  tasks:

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---
- name: Configure Users
  hosts: localhost
  gather_facts: no
  tasks:
    - name: Create dictionary of users
      set_fact:
        users:
          user1:
            name: jdoe

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Reference: Linux commands cheat sheet

#Linux Cheat Sheet

##File Commands:

• ls – directory listing
• ls -al – formatted listing with hidden files
• cd dir - change directory to dir
• cd – change to home
• pwd – show current directory

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Reference: 3 Easy Ways to Find IP address in Linux

Find private ip address for all network interfaces in Linux

ip a
ip addr
ip address show 
ifconfig -a

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du

Summarize disk usage of each FILE, recursively for directories sorted by size

sudo du -x -h / | sort -n | tail -40

reference: how to check file size in Linux

truncate

Truncate files to size 0MB

truncate -s 0 production.log

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Apparently the stat utility only shows the creation time for files but leaves out the birth field empty for directories.

stat /path/somedir

reference: how to check file creation time in Linux

Output

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Below, you'll find a collection of Linux resources categorized into resource types - videos, books, sites, etc. I hope it will serve you well in your journey of becoming a Linux Master ;

Learn Linux Sites for Beginners

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In every operating system, there are users and groups with unique names and unique IDs. These users have access, control and permissions to create and manipulate files, manage processes and services.

In linux, there are four types of users: use the $ cat /etc/groups to view all the users and user groups or $ sudo cat /etc/passwd to view the users and users groups in detail including the paths(directory) where their files are stored.

• Root user

Root user is a default user automatically created upon the OS installation. The root user has the highest privileges, access to all files and services and can perform a wide range of functions. The default ID for every root user is 0. One of the ways to perform functions with administrative privileges is to initiate a command using $ sudo which means superuser do . You can equally enter into root with $ sudo -i. However, you need to provide the root password for authentication. Run $ sudo cat /etc/sudoers to view users

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Top 15 Linux Interview Questions & Answers for Job Seekers

Do you know that more than 90% of the fastest computers in the world run on Linux? Linux is fast, strong, and a favourite among techies. If you want to become a Linux Administrator, this is the right place to prepare for the interview.

In this article, we have shared the 15 top Linux interview questions and answers that every job seeker should read.

Top 15 LINUX Interview Questions And Answers