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cat '/etc/security/limits.conf'B

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/etc/systemd/system.confB
/etc/systemd/system.confR
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Basically:
Edit /etc/systemd/user.conf for the soft limit, and add DefaultLimitNOFILE=1048576.
Edit /etc/systemd/system.conf for the soft limit, and add DefaultLimitNOFILE=2097152.
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