Creating a script file (.sh) in Bash Scripting - Practice Exercises

Challenge - 5 Problems

💻 Command Output

intermediate

What is the output of this script?

Consider this bash script saved as hello.sh and executed with bash hello.sh:

#!/bin/bash
echo "Hello, World!"

What will be printed on the terminal?

Bash Scripting

#!/bin/bash
echo "Hello, World!"

A Error: command not found

B hello world

C Hello, World!

D No output

💡 Hint

Look at the echo command and what it prints exactly.

The script uses echo to print the exact string "Hello, World!" including capitalization and punctuation.

📝 Syntax

intermediate

Which script has a syntax error?

Identify which of these bash scripts will cause a syntax error when run.

A

#!/bin/bash
while true; do echo "Loop"; break; done

B

#!/bin/bash
echo "Start"
if [ $1 -eq 1 ]; then echo "One" fi

C

#!/bin/bash
for i in 1 2 3; do echo $i; done

D

#!/bin/bash
echo "Done"

💡 Hint

Check if all if statements have proper closing keywords.

Option B is missing a semicolon or newline before 'fi', causing a syntax error.

🚀 Application

advanced

What does this script do?

Analyze this bash script and choose the correct description of its behavior:

#!/bin/bash
count=0
while [ $count -lt 3 ]; do
  echo "Count is $count"
  ((count++))
done
echo "Finished counting"

Bash Scripting

#!/bin/bash
count=0
while [ $count -lt 3 ]; do
  echo "Count is $count"
  ((count++))
done
echo "Finished counting"

A Prints 'Count is 0' three times then 'Finished counting'

B Infinite loop printing 'Count is 0'

C Prints 'Finished counting' only

D Prints 'Count is 0', 'Count is 1', 'Count is 2' then 'Finished counting'

💡 Hint

Look at the loop condition and how count changes.

The loop runs while count is less than 3, printing count values 0,1,2 then exits.

🔧 Debug

advanced

Why does this script fail to run?

This script is saved as myscript.sh and run with ./myscript.sh. It shows Permission denied. Why?

#!/bin/bash
echo "Running script"

A The script file does not have execute permission.

B The shebang line is incorrect.

C The echo command is misspelled.

D The script is missing a closing quote.

💡 Hint

Check file permissions with ls -l.

Without execute permission, the shell cannot run the script directly.

🧠 Conceptual

expert

What is the correct way to create a script file that runs on any bash shell?

You want to create a script file named runme.sh that works on any system with bash installed. Which option correctly creates and prepares this script?

A Create file with content starting with '#!/bin/bash', save it, then run 'chmod +x runme.sh' before executing.

B Create file with content starting with '#!/bin/sh', save it, then run 'chmod 644 runme.sh' before executing.

C Create file with content starting with '#!/bin/bash', save it, then run 'chmod 777 runme.sh' before executing.

D Create file with content starting with '#!/bin/bash', save it, then run 'chmod 600 runme.sh' before executing.

💡 Hint

The script needs execute permission and the correct shebang for bash.

Option A uses the correct shebang and sets execute permission properly without over-permission.