Day 5 Task: Advanced Linux Shell Scripting for DevOps Engineers with User management

Write a bash script createDirectories.sh that when the script is executed with three given arguments (one is directory name and second is start number of directories and third is the end number of directories ) it creates specified number of directories with a dynamic directory name.

• Let's create a script in vim editor with the name createDirectories.sh

      #!/bin/bash
      dir_name=$1
      start_range=$2
      end_range=$3
  
      echo "******************Creating Directoris******************"
      for (( i=start_range; i<=end_range; i++ ))
      do
              sub_dir=${dir_name}${i}
              mkdir "${sub_dir}"
              echo "creating diretory --> $sub_dir"
      done
      echo "************Directoris Created Successfully************"
  

• Here, $1, $2 and $3 are the arguments that are to be passed while executing the script in our terminal.

  

Create a Script to backup all your work done till now.

#Diretory to be backed up
source_dir=/home/ubuntu/day5_q2

#Backup destination directory
backup_dir=/home/ubuntu/backup_day5_q2

#create backup filename
backup_file=$(date +'%d-%m-%y_%H%M%S').tar.gz

echo "******* Backup Started*****"
#create backup using tar
tar -cvf "${backup_dir}/$backup_file" "$source_dir"
echo "******Backup Completed*****"

Create 2 users and just display their Usernames

1. To create user:

     sudo useradd -m Devops_student1
     sudo useradd -m Devops_student2
   

2. To set a password:

     ubuntu@ip-172-31-89-192:~$ sudo passwd Devops_student1
     New password: 
     Retype new password: 
     passwd: password updated successfully
     ubuntu@ip-172-31-89-192:~$ 
     ubuntu@ip-172-31-89-192:~$ sudo passwd Devops_student2
     New password: 
     Retype new password: 
     passwd: password updated successfully
     ubuntu@ip-172-31-89-192:~$
   

3. To view users:

   

4. To create a group:

     sudo groupadd deevops_community
   

5. To add users to a group:

     sudo usermod -aG deevops_community Devops_student1
     sudo usermod -aG deevops_community Devops_student2
   

6. To view users in a group:

   

Conclusion

In this blog, we explored a range of powerful commands that empower DevOps practitioners to streamline processes, improve productivity, and enhance system performance.

Thank you for reading! Keep Supporting, learning and growing with each other.