[Solved] Why does this script fail?cat But this works:cat - Ans: Second script uses <<- which strips leading tabs | Bash Scripting

Bash Scripting - Text Processing in Scripts

Why does this script fail?

cat <
But this works:
cat <<-EOF
	Hello
	World
EOF

ASecond script quotes the delimiter

BFirst script has trailing spaces after EOF

CFirst script uses wrong delimiter spelling

DSecond script uses <<- which strips leading tabs

Step-by-Step Solution

Solution:

Step 1: Understand <<- operator effect
The <<- operator strips leading tabs from here document lines, allowing indented input.
Step 2: Reason about failure
The first script fails if lines have tabs but delimiter is <<, which does not strip tabs, causing mismatch.
Final Answer:
Second script uses <<- which strips leading tabs -> Option D
Quick Check:
<<- strips tabs, fixing indentation issues [OK]

Quick Trick: Use <<- to allow indented here document content [OK]

Common Mistakes:

MISTAKES

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