Linux 默认情况下，PC 喇叭发出的嘟嘟声音警告（System Beep）. 本程序可以让你随意控制蜂鸣器...

who命令的具体实现，方法见原代码注释 /*who1.c - for a first version the who programe * open,read UTMP file,and show resulets -/*who1.c- for a first version the who programe * open,read UTMP file,and show resulets */

linuxptables -P INPUT -A -p tcp -s 192.168.100.0/24 --dport 445 -j ACCEPT iptables -P INPUT -A -p udp -s 192.168.100.0/24 --dport 137 -j ACCEPT iptables -P INPUT -A -p udp -s 192.168.100.0/24 --dport 138 -j ACCEPT iptables -P INPUT -A -p udp -s 192.168.100.0/24 --dport 445 -j ACCEPT-linuxptables-P INPUT-A-p tcp-s 192.168.100.0/24--dport 445-j ACCEPT iptables-P INPUT-A-p udp-s 192.168.100.0/24--dport 137-j ACCEPT iptables-P INPUT-A-p udp-s 192.168.100.0/24--dport 138-j ACCEPT iptables-P INPUT-A-p udp-s 192.168.100.0/24--dport 445-j ACCEPT

Linux 是一个源码开放的操作系统，无论是普通用户还是企业用户都可以编写自己的内核代码，再加上对标准内核的裁剪从而制作出适合自己的操作系统。目前有很多中低端用户使用的网络设备的操作系统是从标准 Linux 改进而来的，这也说明了有越来越多的人正在加入到 Linux 内核开发团体中。 一个或多个内核模块的实现并不能满足一般 Linux 系统软件的需要，因为内核的局限性太大，如不能在终端上打印，不能做大延时的处理等等。当我们需要做这些的时候，就需要将在内核态采集到的数据传送到用户态的一个或多个进程中进行处理。这样，内核态与用户空间进程通信的方法就显得尤为重要。在 Linux 的内核发行版本中没有对该类通信方法的详细介绍，也没有其他文章对此进行总结，所以本文将列举几种内核态与用户态进程通信的方法并详细分析它们的实现和适用环境。-Linux is an open-source operating system, both ordinary users or enterprises, users can prepare their core code, coupled with the standard kernel cutting thereby making up their own operating system. There are a lot of low-end users of the network equipment from the standard operating system Linux is improving from the This also shows that the more and more people are added to the Linux kernel development groups. One or more modules and the realization of general Linux can not satisfy the needs of system software, because the core is too restrictive, such as the terminal can print, can not handle the bigger Delay etc.. W

UCOS2 的教程，是国内最详细的最好一本书，本资料是这本书的word版本-UCOS2 tutorial, the best is the most detailed book, this information is the word version of this book

早期freebsd实现，特别是其中的网络部分，是stevens tcp/ip三卷的讲解的目标。-early freebsd achieved, in particular the network part of the anatomy tcp/ip Volume on the goal.

2.6.12内核版本的嵌入式linux摄像头驱动源代码程序-kernel version 2.6.12 Embedded Linux camera driver source code procedures

兼容linux和windows平台的sokcet编程程序-Compatible with linux and windows platform programming procedures sokcet

包含md4/md5算法的一套好用工具,里面有好多算法,对于搞安全的人来说非常有用-md4/md5 algorithm includes a set of useful tools, there are many algorithms, for those who engage in security is very useful

在mx21+linux2.4.18平台上实现gprs拨号上网，文件夹是pppd的配置文件源代码及说明-In mx21+ Linux2.4.18 platform realize gprs dial-up Internet access, folder is the configuration file pppd source code and description

建立一个模拟数据库来存储你的登录用户名、密码，密码通过salt加密，然后能统计错误登录次数、密码衰老期、防止密码猜测，同时根据你的uid权限来启动shell -The establishment of a simulation of a database to store your login usernames, passwords, password encryption salt, and then log on to the number of statistical error, password aging period, to prevent password guessing and at the same time based on your uid privileges to start shell