[Solved] Which of the following is the correct way to read a file line by line in bash? - Ans: while read line; do echo $line; done < filename.txt | Bash Scripting

Bash Scripting - Text Processing in Scripts

Which of the following is the correct way to read a file line by line in bash?

Afor line in filename.txt; do echo $line; done

Bwhile read line; do echo $line; done < filename.txt

Ccat filename.txt | for line in; do echo $line; done

Dread filename.txt | while line; do echo $line; done

Step-by-Step Solution

Solution:

Step 1: Identify correct bash syntax for reading lines
The syntax 'while read line; do ... done < filename' correctly reads each line from the file.
Step 2: Check other options for errors
Options A, C, and D have syntax errors or misuse commands.
Final Answer:
while read line; do echo $line; done < filename.txt -> Option B
Quick Check:
Correct line reading syntax = B [OK]

Quick Trick: Use 'while read' loop with input redirection to read lines [OK]

Common Mistakes:

MISTAKES

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Which of the following is the correct way to read a file line by line in bash?