Report generation script in Bash Scripting - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the main purpose of a report generation script in bash?

To automatically collect data, process it, and create a formatted report file without manual steps.

beginner

Which bash command is commonly used to write output to a file in a report script?

The 'echo' command combined with redirection operators like '>' or '>>' is used to write or append output to a file.

beginner

How can you include the current date and time in a bash report?

Use the 'date' command, for example: $(date) to insert the current date and time into the report.

intermediate

Why is it useful to check if a file exists before writing a report in bash?

To avoid overwriting important data accidentally or to decide whether to append or create a new report file.

beginner

What does the '>>' operator do in a bash script?

It appends output to the end of a file without deleting the existing content.

Which command adds the current date to a report file in bash?

A cat date >> report.txt

B date > report.txt

C echo "$(date)" >> report.txt

D ls -l >> report.txt

Option C uses echo with command substitution to append the current date to the report file.

What does the '>' operator do in a bash script?

A Overwrites a file with new output

B Appends output to a file

C Reads from a file

D Deletes a file

The '>' operator overwrites the file with new output, replacing any existing content.

How do you check if a file named 'report.txt' exists in bash?

A [ -f report.txt ]

B if file report.txt

C exists report.txt

D test report.txt

The '[ -f filename ]' test checks if a regular file exists.

Which command appends text 'Hello' to a file named 'output.txt'?

A echo Hello > output.txt

B write Hello output.txt

C cat Hello >> output.txt

D echo Hello >> output.txt

Using '>>' appends the text to the file without deleting existing content.

What is a good reason to automate report generation with a bash script?

A To make reports harder to read

B To reduce manual work and avoid errors

C To delete important data

D To slow down the system

Automation saves time and reduces mistakes by handling repetitive tasks automatically.

Explain the basic steps to create a simple report generation script in bash.

Think about how you gather info, format it, and save it in a file.

Describe how you would safely update a report file daily using a bash script.

Consider file existence and preserving old data.