Bash vs other shells (Zsh, Fish, sh) in Bash Scripting - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print the current shell name using an environment variable.

Bash Scripting

echo $[1]

Drag options to blanks, or click blank then click option'

ASHELL

BPATH

CHOME

DUSER

Attempts:

3 left

💡 Hint

Common Mistakes

Using PATH or HOME instead of SHELL.

The SHELL environment variable holds the path to the current shell.

2fill in blank

medium

Complete the code to list all files in the current directory using a shell command.

Bash Scripting

[1] -l

Drag options to blanks, or click blank then click option'

Apwd

Bcd

Cecho

Dls

Attempts:

3 left

💡 Hint

Common Mistakes

Using cd or pwd which do not list files.

The ls command lists files and directories. The -l option shows details.

3fill in blank

hard

Fix the error in the script to correctly check if the shell is Zsh.

Bash Scripting

if [ "$SHELL" = [1] ]; then
echo "You are using Zsh"
fi

Drag options to blanks, or click blank then click option'

A"/bin/zsh"

B"/bin/sh"

C"/usr/bin/fish"

D"/bin/bash"

Attempts:

3 left

💡 Hint

Common Mistakes

Using bash or fish paths instead of zsh.

The SHELL variable holds the shell path. For Zsh, it is usually /bin/zsh.

4fill in blank

hard

Fill both blanks to create a script that prints 'Fish shell detected' if the shell is Fish.

Bash Scripting

if [ $[1] = [2] ]; then
echo "Fish shell detected"
fi

Drag options to blanks, or click blank then click option'

A$SHELL

B"/usr/bin/fish"

C"/bin/fish"

D$USER

Attempts:

3 left

💡 Hint

Common Mistakes

Using $USER or wrong shell paths.

Use $SHELL to get the shell path and compare it to /bin/fish which is a common Fish shell path.

5fill in blank

hard

Fill all three blanks to create a script that prints the shell name without the path.

Bash Scripting

shell_name=$(basename [1])
echo "Current shell is [2]"
# Check if shell is [3]

Drag options to blanks, or click blank then click option'

A$SHELL

B$shell_name

Cbash

Dfish

Attempts:

3 left

💡 Hint

Common Mistakes

Using the full path instead of just the shell name.

basename $SHELL extracts the shell name from the path. Then we print it and check if it is 'bash'.