我之前从 OVH 租过一个集装箱，但昨晚我的机器突然在 IP 层面停止响应……重启后，我注意到以下情况
systemd-sysctl.service - Apply Kernel Variables
Loaded: loaded (/usr/lib/systemd/system/systemd-sysctl.service; static
Active: failed (Result: exit-code)
sysctl -p /etc/sysctl.d/50-default.conf
生成：
sysctl: permission denied on key 'kernel.sysrq'
sysctl: permission denied on key 'kernel_core_uses_pid'
net.ipv4.conf.default.rp_filter =1
net.ipv4.conf.default.accept_source_route = 0
sysctl: cannot stat /proc/sys/fs/protected_hardlinks: No such file or directory
sysctl: cannot stat /proc/sys/fs/protected_symlinks: No such file or directory