Bash Scripting - File Operations in Scripts
What does the file descriptor number 0 represent in bash scripting?
What does the file descriptor number 0 represent in bash scripting?
easy🧠 Conceptual Q1 of 15
Step-by-Step Solution
Solution:
Step 1: Understand file descriptor basics
File descriptor 0 is always assigned to standard input in bash and Unix-like systems.Step 2: Match descriptor to stream
Standard output is 1, standard error is 2, so 0 must be standard input.Final Answer:
Standard input (stdin) -> Option CQuick Check:
File descriptor 0 = Standard input [OK]
Quick Trick: Remember: 0=stdin, 1=stdout, 2=stderr [OK]
Common Mistakes:
MISTAKES- Confusing 0 with standard output
- Thinking 0 is standard error
- Assuming 0 is a temporary descriptor
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