Kuk Linux 2023

Kuk Linux 2023

Kuk Linux 2023

Q1(a):- Write atleast three types of shells and how to change shell.

1. Bourne Again Shell (bash)

  • Bash is one of the most commonly used shells in Unix-like systems.
  • It is an enhanced version of the original Bourne Shell (sh).
  • Features include command-line editing, job control, and shell functions.

2. Z Shell (zsh)

  • Zsh is known for its powerful features and customization options.
  • It includes features from bash, ksh, and tcsh.
  • Zsh has powerful scripting capabilities and built-in support for plugins.

3. Fish Shell (fish)

  • Fish (Friendly Interactive Shell) is known for its user-friendly and interactive features.
  • It has a clean syntax and offers powerful features out of the box.
  • Features include autosuggestions, syntax highlighting, and web-based configuration.

Changing the Default Shell for a User

To change the default shell for your user, you can use the chsh (change shell) command. Here are the steps:
1. Open Terminal:
Open your terminal application.
2. Check Available Shells:

View the list of available shells on your system by running:

cat /etc/shells
3.Change Shell:
Use the chsh command followed by the path of the new shell:
chsh -s /path/to/shell
Replace /path/to/shell with the actual path to the shell you want to use (e.g., /bin/bash, /usr/bin/zsh).
4. Verify the Change:

Log out and log back in, or restart your terminal. Verify the change by checking the shell.

echo $SHELL

Q1(b):- Write a program to find largest of three numbers.

Bash Script to Find the Largest of Three Numbers

1. Create a new file

nano largest_of_three.sh

2. Add the following script:

#!/bin/bash

# Function to find the largest of three numbers
find_largest() {
if [ $1 -gt $2 ] && [ $1 -gt $3 ]; then
echo “The largest number is: $1”
elif [ $2 -gt $1 ] && [ $2 -gt $3 ]; then
echo “The largest number is: $2”
else
echo “The largest number is: $3”
fi
}

# Read three numbers from the user
read -p “Enter the first number: ” num1
read -p “Enter the second number: ” num2
read -p “Enter the third number: ” num3

# Call the function with the input numbers
find_largest $num1 $num2 $num3

3. Make the script executable:

chmod +x largest_of_three.sh

4. Run the script:

./largest_of_three.sh
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