修改 /etc/sysctl.conf 后，sysctl -p 报错
sysctl: permission denied on key 'net.core.wmem_max' sysctl: permission denied on key 'net.core.rmem_max' sysctl: permission denied on key 'net.ipv4.tcp_rmem' sysctl: permission denied on key 'net.ipv4.tcp_wmem' sysctl: permission denied on key 'net.ipv4.ip_local_port_range'
从 http://www.muxi.me/suibian/417.html 找到答案，openvz 模板问题
解决方案如下
rm -f /sbin/sysctl ln -s /bin/true /sbin/sysctl
重新执行 sysctl -p