Ubuntu: What does 2＞/dev/null mean?

Ubuntu: What does 2＞/dev/null mean?

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Ubuntu: What does the script /dev/null do?
Ubuntu: What does the script /dev/null do?
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Ubuntu: What does the script /dev/null do?

Ubuntu: What does the script /dev/null do?
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Unix & Linux: "＞/dev/null 2＞&1" in `if` statement
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eliminating command output using dev null
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Unix & Linux: What does 'script /dev/null' do?
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Unix & Linux: What does '＞/dev/null 2＞&1' mean in this article of crontab basics? (6 Solutions!!)