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

To create user:

  sudo useradd -m Devops_student1
  sudo useradd -m Devops_student2

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:~$

To view users:
To create a group:
```
  sudo groupadd deevops_community
```

To add users to a group:

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

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.