Day 5: Advanced Linux Shell Scripting

Day5 Task

🔹Create a Script to back up all your work done till now.

🔹Read About Cron and Crontab, to automate the backup Script.

🔹Read about User Management

🔹Create 2 users and just display their Usernames.

🔹Create a Script to back up all your work done till now.

🔸Script for back up all the work which we have done till now.

#!/bin/bash

backup_direcrtory="/path/to/backup"
source_direcrtory="/path/to/source"

current_timestamp=$(date "+%Y-%m-%d-%H-%M-%S")

tar -czvf "$backup_directory --$src_dir

echo "All Backup"

🔹About Cron and Crontab, to automate the backup Script.

Cron and crontab:

🔸Crontab: crontab is the configuration file used to define cron jobs .it holds the schedule.

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.

🔹To view the crontab file, use the following command:

$ crontab –l

🔹To view the crontab file of a particular user, use the following command:

$ sudo crontab –u user -l

🔹To edit the crontab file of the current user:

$ crontab –e

🔹To edit the crontab file of a particular user:

$ sudo crontab -u user

🔹About User Management

🔸user management revolves around creating, modifying, and deleting user accounts, managing permissions, and controlling access to system resources.

Some User Management Commands

🔹This is the command to add a user. useradd command adds a new user to the directory.

sudo useradd <username>

🔹This passwd command to assign a password to a user:

sudo passwd <username>

🔹Using the id command,you can get the ID of any username:

id <username>

🔹Create 2 users and just display their Usernames.

🔸Here I am creating users as user1 and user2 and displaying their Usernames on the output.

sudo useradd user1
sudo useradd user2

echo "User A: $(id -un user1)"
echo "User B: $(id -un user2)"

Thanks for reading to the end; I hope you gained some knowledge.❤️🙌

Vishesh Ghule