Unix & Linux: Difference between ＞/dev/null 2＞&1 & and ＜/dev/null &＞/dev/null &

Unix & Linux: Difference between ＞/dev/null 2＞&1 & and ＜/dev/null &＞/dev/null &

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Unix & Linux: "＞/dev/null 2＞&1" in `if` statement
Unix & Linux: "＞/dev/null 2＞&1" in `if` statement
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