sysctl command reports "No such file or directory" after adding kernel parameters

Issue

• Getting an error when executing sysctl -p "sysctl: cannot stat /proc/sys/* : No such file or directory" After updating the kernel parameters in sysctl.conf.

    [root@localhost ~]# sysctl -p

    sysctl: cannot stat /proc/sys/tcp_keepalive_probes: No such file or directory
    sysctl: cannot stat /proc/sys/tcp_keepalive_intvl: No such file or directory
    sysctl: cannot stat /proc/sys/tcp_retries2: No such file or directory
    sysctl: cannot stat /proc/sys/icmp_echo_ignore_broadcasts: No such file or directory
    sysctl: cannot stat /proc/sys/icmp_echo_ignore_broadcasts: No such file or directory