TrainWithShubham · ghO0sst · Nov 3, 2023 · Nov 4, 2023 · Nov 7, 2023 · Nov 7, 2023
diff --git a/.github/workflows/stale.yml b/.github/workflows/stale.yml
@@ -0,0 +1,27 @@
+# This workflow warns and then closes issues and PRs that have had no activity for a specified amount of time.
+#
+# You can adjust the behavior by modifying this file.
+# For more information, see:
+# https://github.com/actions/stale
+name: Mark stale issues and pull requests
+
+on:
+  schedule:
+  - cron: '20 7 * * *'
+
+jobs:
+  stale:
+
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+
+    steps:
+    - uses: actions/stale@v5
+      with:
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
+        stale-issue-message: 'Stale issue message'
+        stale-pr-message: 'Stale pull request message'
+        stale-issue-label: 'no-issue-activity'
+        stale-pr-label: 'no-pr-activity'
diff --git a/2023/day01/tasks.md → 2023/day01/README.md b/2023/day01/tasks.md → 2023/day01/README.md
@@ -5,7 +5,8 @@ This is the day you have to Take this challenge and start your #90DaysOfDevOps w
 - Fork this Repo.
 - Start with a DevOps Roadmap[https://youtu.be/iOE9NTAG35g]
 - Write a LinkedIn post or a small article about your understanding of DevOps
- - What is DevOps
- - What is Automation, Scaling, Infrastructure
- - Why DevOps is Important, etc
-
+- What is DevOps
+- What is Automation, Scaling, Infrastructure
+- Why DevOps is Important, etc
+
+[Next Day →](../day02/README.md)
diff --git a/2023/day02/tasks.md → 2023/day02/README.md b/2023/day02/tasks.md → 2023/day02/README.md
@@ -1,10 +1,13 @@
 Day 2 Task: Basics linux command
 
-Task: What is the linux command to 
+Task: What is the linux command to
+
 1. Check your present working directory.
 2. List all the files or directories including hidden files.
 3. Create a nested directory A/B/C/D/E
 
 Note: [Check this file for reference](basic_linux_commands.md)
 
 Check the basic_linux_commands.md file on the same directory day2
+
+[← Previous Day](../day01/README.md) | [Next Day →](../day03/README.md)
diff --git a/2023/day02/basic_linux_commands.md b/2023/day02/basic_linux_commands.md
@@ -21,7 +21,7 @@ Examples:
 
 - ``` cd - ``` --> Go to the last working directory.
 
-- ``` cd ..``` --> chnage directory to one step back.
+- ``` cd ..``` --> change directory to one step back.
 
 - ``` cd ../..``` --> Change directory to 2 levels back.
 

diff --git a/2023/day03/tasks.md → 2023/day03/README.md b/2023/day03/tasks.md → 2023/day03/README.md
@@ -14,5 +14,6 @@ Task: What is the linux command to
 10. Add content in Colors.txt (One in each line) - Red, Pink, White, Black, Blue, Orange, Purple, Grey.
 11. To find the difference between fruits.txt and Colors.txt file.
 
-
 Reference: https://www.linkedin.com/pulse/linux-commands-devops-used-day-to-day-activit-chetan-/
+
+[← Previous Day](../day02/README.md) | [Next Day →](../day04/README.md)
diff --git a/2023/day04/README.md b/2023/day04/README.md
@@ -0,0 +1,31 @@
+# Day 4 Task: Basic Linux Shell Scripting for DevOps Engineers.
+
+## What is Kernel
+
+The kernel is a computer program that is the core of a computer’s operating system, with complete control over everything in the system.
+
+## What is Shell
+
+A shell is special user program which provide an interface to user to use operating system services. Shell accept human readable commands from user and convert them into something which kernel can understand. It is a command language interpreter that execute commands read from input devices such as keyboards or from files. The shell gets started when the user logs in or start the terminal.
+
+## What is Linux Shell Scripting?
+
+A shell script is a computer program designed to be run by a linux shell, a command-line interpreter. The various dialects of shell scripts are considered to be scripting languages. Typical operations performed by shell scripts include file manipulation, program execution, and printing text.
+
+**Tasks**
+
+- Explain in your own words and examples, what is Shell Scripting for DevOps.
+- What is `#!/bin/bash?` can we write `#!/bin/sh` as well?
+- Write a Shell Script which prints `I will complete #90DaysOofDevOps challenge`
+- Write a Shell Script to take user input, input from arguments and print the variables.
+- Write an Example of If else in Shell Scripting by comparing 2 numbers
+
+Was it difficult?
+
+- Post about it on LinkedIn and Let me know :)
+
+Article Reference: [Click here to read basic Linux Shell Scripting](https://devopscube.com/linux-shell-scripting-for-devops/)
+
+YouTube Video: [EASIEST Shell Scripting Tutorial for DevOps Engineers](https://www.youtube.com/watch?v=_-D6gkRj7xc&list=PLlfy9GnSVerQr-Se9JRE_tZJk3OUoHCkh&index=3)
+
+[← Previous Day](../day03/README.md) | [Next Day →](../day05/README.md)
diff --git a/2023/day04/tasks.md b/2023/day04/tasks.md
diff --git a/2023/day05/README.md b/2023/day05/README.md
@@ -0,0 +1,53 @@
+# Day 5 Task: Advanced Linux Shell Scripting for DevOps Engineers with User management
+
+If you noticed that there are a total 90 sub-directories in the directory '2023' of this repository. What did you think, how did I create 90 directories? Manually one by one or using a script, or a command?
+
+All 90 directories within seconds using a simple command.
+
+` mkdir day{1..90}`
+
+### Tasks
+
+1. You have to do the same using Shell Script i.e using either Loops or command with start day and end day variables using arguments -
+
+So Write a bash script create directories.sh that when the script is executed with three given arguments (one is the directory name and second is start number of directories and third is the end number of directories ) it creates a specified number of directories with a dynamic directory name.
+
+Example 1: When the script is executed as
+
+`./createDirectories.sh day 1 90`
+
+then it creates 90 directories as `day1 day2 day3 .... day90`
+
+Example 2: When the script is executed as
+
+`./createDirectories.sh Movie 20 50`
+then it creates 50 directories as `Movie20 Movie21 Movie23 ...Movie50`
+
+Notes:
+You may need to use loops or commands (or both), based on your preference . [Check out this reference: https://www.geeksforgeeks.org/bash-scripting-for-loop/](https://www.geeksforgeeks.org/bash-scripting-for-loop/)
+
+2.  Create a Script to backup all your work done till now.
+
+Backups are an important part of DevOps Engineer's day to Day activities
+The video in References will help you to understand How a DevOps Engineer takes backups (it can feel a bit difficult but keep trying, Nothing is impossible.)
+Watch [this video](https://youtu.be/aolKiws4Joc)
+
+In case of Doubts, post it in [Discord Channel for #90DaysOfDevOps](https://discord.gg/hs3Pmc5F)
+
+3.  Read About Cron and Crontab, to automate the backup Script
+
+Cron is the system's main scheduler for running jobs or tasks unattended. A command called crontab allows the user to submit, edit or delete entries to cron. A crontab file is a user file that holds the scheduling information.
+
+Watch This video as a Reference to Task 2 and 3 [https://youtu.be/aolKiws4Joc](https://youtu.be/aolKiws4Joc)
+
+4.  Read about User Management and Let me know on Linkedin if you're ready for Day 6.
+
+A user is an entity, in a Linux operating system, that can manipulate files and perform several other operations. Each user is assigned an ID that is unique for each user in the operating system. In this post, we will learn about users and commands which are used to get information about the users. After installation of the operating system, the ID 0 is assigned to the root user and the IDs 1 to 999 (both inclusive) are assigned to the system users and hence the ids for local user begins from 1000 onwards.
+
+5.  Create 2 users and just display their Usernames
+
+[Check out this reference: https://www.geeksforgeeks.org/user-management-in-linux/](https://www.geeksforgeeks.org/user-management-in-linux/)
+
+Post your daily work on Linkedin and let [me](https://www.linkedin.com/in/shubhamlondhe1996/) know , writing an article is the best :)
+
+[← Previous Day](../day04/README.md) | [Next Day →](../day06/README.md)
diff --git a/2023/day05/tasks.md b/2023/day05/tasks.md
diff --git a/2023/day06/README.md b/2023/day06/README.md
@@ -0,0 +1,31 @@
+# Day 6 Task: File Permissions and Access Control Lists
+
+### Today is more on Reading, Learning and Implementing File permissions
+
+The concept of Linux File permission and ownership is important in Linux.
+Here, we will be working on Linux permissions and ownership and will do tasks on
+both of them.
+Let us start with the Permissions.
+
+1. Create a simple file and do `ls -ltr` to see the details of the files [refer to Notes](https://github.com/LondheShubham153/90DaysOfDevOps/tree/master/2023/day06/notes)
+
+Each of the three permissions are assigned to three defined categories of users. The categories are:
+
+- owner — The owner of the file or application.
+- "chown" is used to change the ownership permission of a file or directory.
+- group — The group that owns the file or application.
+- "chgrp" is used to change the group permission of a file or directory.
+- others — All users with access to the system. (outised the users are in a group)
+- "chmod" is used to change the other users permissions of a file or directory.
+
+  As a task, change the user permissions of the file and note the changes after `ls -ltr`
+
+2. Write an article about File Permissions based on your understanding from the notes.
+
+3. Read about ACL and try out the commands `getfacl` and `setfacl`
+
+In case of any doubts, post it on [Discord Community](https://discord.gg/hs3Pmc5F)
+
+Happy Learning
+
+[← Previous Day](../day05/README.md) | [Next Day →](../day07/README.md)
diff --git a/2023/day06/tasks.md b/2023/day06/tasks.md
diff --git a/2023/day07/README.md b/2023/day07/README.md
@@ -0,0 +1,43 @@
+# Day 7 Task: Understanding package manager and systemctl
+
+### What is a package manager in Linux?
+
+In simpler words, a package manager is a tool that allows users to install, remove, upgrade, configure and manage software packages on an operating system. The package manager can be a graphical application like a software center or a command line tool like apt-get or pacman.
+
+You’ll often find me using the term ‘package’ in tutorials and articles, To understand package manager, you must understand what a package is.
+
+### What is a package?
+
+A package is usually referred to an application but it could be a GUI application, command line tool or a software library (required by other software programs). A package is essentially an archive file containing the binary executable, configuration file and sometimes information about the dependencies.
+
+### Different kinds of package managers
+
+Package Managers differ based on packaging system but same packaging system may have more than one package manager.
+
+For example, RPM has Yum and DNF package managers. For DEB, you have apt-get, aptitude command line based package managers.
+
+## Tasks
+
+1.  You have to install docker and jenkins in your system from your terminal using package managers
+
+2.  Write a small blog or article to install these tools using package managers on Ubuntu and CentOS
+
+### systemctl and systemd
+
+systemctl is used to examine and control the state of “systemd” system and service manager. systemd is system and service manager for Unix like operating systems(most of the distributions, not all).
+
+## Tasks
+
+1.  check the status of docker service in your system (make sure you completed above tasks, else docker won't be installed)
+
+2.  stop the service jenkins and post before and after screenshots
+
+3.  read about the commands systemctl vs service
+
+eg. `systemctl status docker` vs `service docker status`
+
+For Reference, read [this](https://www.howtogeek.com/devops/how-to-check-if-the-docker-daemon-or-a-container-is-running/#:~:text=Checking%20With%20Systemctl&text=Check%20what%27s%20displayed%20under%20%E2%80%9CActive,running%20sudo%20systemctl%20start%20docker%20.)
+
+#### Post about this and bring your friends to this #90DaysOfDevOps challenge.
+
+[← Previous Day](../day06/README.md) | [Next Day →](../day08/README.md)
diff --git a/2023/day07/tasks.md b/2023/day07/tasks.md