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/proc和/sys/proc存放内核参数 基本只读，但是/proc/sys可读写/sys 某些目录可读写，可以写入某些参数修改硬件的工作属性sysctl命令修改/proc/sys属性sysctl net.ipv4.ip_forword=1配置文件/etc/sysctl.confnet.ipv4.ip_forword=1Linux Permissionumask文件默认文件权限 = 0666 - umask值，如果文件默认会有x权限则权限自动+1目

vimscript function! 的含义When [!] is used, an existing function is silently replaced. Unless it is currently being executed, that is an error.NOTE: Use ! wisely. If used without care it can cause...