# What I Learned – Week 2 | Web2 Beginners (Cohort 3)
This week focused on Linux system administration basics: managing users, groups, and permissions through the terminal.

Group & User Management
I Created a new group:

sudo groupadd Cohort-3-web2
Added users Ali and Bobb to the group:

sudo useradd -G Cohort-3-web2 Ali
sudo useradd -G Cohort-3-web2 Bobb
sudo passwd Ali
sudo passwd Bobb
Verified group members:

getent group Cohort-3-web2
Shared Directory Access
Created a shared directory and assigned it to the group:

Confirmed that Ali and Bobb could create files in the directory using sudo -u.

mkdir ~/Documents/web2/cohort3
sudo chown :Cohort-3-web2 ~/Documents/web2/cohort3

I learned that even within the same group, users can't edit each other's files without proper permissions.

Additional Practice
Created another group Cohort-2 and added a user Ola.
Confirmed that Ola had no access to the cohort3 directory — reinforcing my understanding of group-based access control.

## Shell Scripting
I also learnt "Bash script" and wrote a simple shell script that:

Prompts the user to enter a valid directory and .sh filename

Appends echo "welcome to shell scripting" to the created file

This improved my use of read, loops, conditions, and file output in Bash.

## Key Takeaways
- [ ] Use sudo when modifying system users or groups.

- [ ] getent group is a useful command to verify group membership.

- [ ] File access depends on both group ownership and file-level permissions.

- [ ] Practical shell experience reinforces theoretical learning.