Set Permanently ulimit -n open files in Fedora

sudo nano /etc/security/limits.d/99-openfiles.conf

* soft    nofile  65536
* hard    nofile  1048576

sudo nano /etc/systemd/system.conf

[Manager]
# Set soft:hard limits
DefaultLimitNOFILE=65536:1048576
# Or set both soft and hard to the same value
# DefaultLimitNOFILE=65536

sudo nano /etc/systemd/user.conf

[Manager]
# Set soft:hard limits
DefaultLimitNOFILE=65536:1048576
# Or set both soft and hard to the same value
# DefaultLimitNOFILE=65536

sudo systemctl daemon-reexec

sysctl fs.file-max

sudo nano /etc/sysctl.d/99-filemax.conf

fs.file-max = <larger_value>

sudo sysctl -p /etc/sysctl.d/99-filemax.conf
# Or apply all sysctl settings: sudo sysctl -p

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