You wrote this sed command to replace 'foo' with 'bar' globally: sed 's/foo/bar/' file.txt. But only the first 'foo' per line is replaced. What is the fix?

medium📝 Debug Q14 of 15

Bash Scripting - Text Processing in Scripts

You wrote this sed command to replace 'foo' with 'bar' globally: sed 's/foo/bar/' file.txt. But only the first 'foo' per line is replaced. What is the fix?

AAdd the 'g' flag: sed 's/foo/bar/g' file.txt

BUse double quotes instead of single quotes

CAdd a space after 'bar/'

DUse sed -i option to edit in place

Step-by-Step Solution

Solution:

Step 1: Identify missing global flag
The command lacks the 'g' flag, so only first occurrence per line is replaced.
Step 2: Add the 'g' flag to fix
Adding 'g' after the substitution pattern makes sed replace all occurrences per line.
Final Answer:
Add the 'g' flag: sed 's/foo/bar/g' file.txt -> Option A
Quick Check:
Global flag 'g' replaces all matches [OK]

Quick Trick: Add 'g' to replace all matches, not just first [OK]

Common Mistakes:

MISTAKES

Thinking quotes affect substitution behavior
Adding spaces inside substitution pattern
Confusing in-place edit with substitution flags

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You wrote this sed command to replace 'foo' with 'bar' globally: sed 's/foo/bar/' file.txt. But only the first 'foo' per line is replaced. What is the fix?

Step 1: Identify missing global flag

Step 2: Add the 'g' flag to fix

Final Answer:

Quick Check:

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