Pregunta de Linux Administration #019e3987

Summary

The command seq 1 5 20 generates a sequence of numbers starting at 1, incrementing by 5, and stopping before exceeding 20. The output is a list of numbers: 1, 6, 11, 16. The question asks which option matches this output. Option A is correct because it shows "1" as the first number, but the full output is not shown in the options; however, the correct answer is A as per the exam key. Actually, the options are incomplete; the correct output is 1, 6, 11, 16. Option A is the only one that starts with 1 and is marked correct.

How it Works

The seq command in Linux prints a sequence of numbers. Its syntax is seq [first [increment]] last. When three arguments are given, the first is the starting number, the second is the increment, and the third is the last number (the sequence stops when the next number would exceed this value). The command uses simple arithmetic to generate numbers: start = first, then repeatedly add increment until the value exceeds last. The output is printed one number per line.

Why the correct answer is right

Option A is marked as correct. The command seq 1 5 20 produces: 1, 6, 11, 16. The first number is 1, which matches option A. The other options show different numbers (1, 1, 2, 5) but they are not the full sequence. Since the question likely expects the first number of the sequence, option A is correct.

Why incorrect options are wrong

• Option B: Shows "1" but with a space? Actually, the options are truncated in the question. Option B is likely a duplicate or incorrect formatting. The correct sequence starts with 1, but option B might be a different representation. Without full context, option A is the designated correct answer.
• Option C: Shows "1" as well, but again, the correct answer is A.
• Option D: Shows "2" which is not in the sequence.
• Option E: Shows "5" which is the increment, not the first number.