Install dmidecode:
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emerge -q sys-apps/dmidecode
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sudo dmidecode --type memory
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sudo dmidecode --type 17
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emerge -q sys-apps/dmidecode
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sudo dmidecode --type memory
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sudo dmidecode --type 17
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iptables-save > save_iptables.txt
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iptables-restore < save_iptables.txt
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iptables -L -nv --line-number
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ls -lha filename
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file filename
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file can_w33.pdf
can_w33.pdf: PDF document, version 1.4