[Solved] Which command correctly reads a file named data.txt line by line in bash? - Ans: while read line; do echo "$line"; done < data.txt | Bash Scripting

Bash Scripting - File Operations in Scripts

Which command correctly reads a file named data.txt line by line in bash?

Aread line < data.txt; echo $line

Bfor line in data.txt; do echo $line; done

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

Dwhile read line; do echo "$line"; done < data.txt

Step-by-Step Solution

Solution:

Step 1: Identify correct syntax for reading lines
The while read line; do ... done < file pattern reads each line properly.
Step 2: Check other options for errors
The read line < data.txt; echo $line reads only one line. The for line in data.txt; do echo $line; done iterates over the filename as a single item. The cat data.txt | for line in; do echo $line; done has a syntax error due to incomplete for loop syntax.
Final Answer:
while read line; do echo "$line"; done < data.txt -> Option D
Quick Check:
Correct syntax = D [OK]

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

Common Mistakes:

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Which command correctly reads a file named data.txt line by line in bash?