fork compare to exec in linux c program
pid_t pid=fork()
it has 3 situation for the return result pid
0 child
>0 parent process
<0 fork fail
fork create a new process and it parent live alse when the child process had been created
相关文档：
总览
用iptables -ADC 来指定链的规
则
，-A添加 -D删除 -C 修改
iptables - [RI] chain rule num rule-specification[option]
用iptables - RI 通过规则的顺序指定
iptables -D chain rule num[option]
删除指定规则
iptables -[LFZ] [chain][option]
用iptables -LFZ 链名 [选项]
iptables -[NX] chain
用 -NX ......
# uname -a # 查看内核/操作系统/CPU信息
# head -n 1 /etc/issue # 查看操作系统版本
# cat /proc/cpuinfo # 查看CPU信息
# hostname&nb ......
HowTo WebCam On Linux
Five fun ways to use a Linux webcam
http://www.linux.com/archive/articles/126186
The Webcam HOWTO
http://tldp.org/HOWTO/html_single/Webcam-HOWTO/
WebCam under Linux
http://www.seismo.ethz.ch/linux/webcam.html
‘Webcams in Linux, Part 1
http://www.linuxplanet. ......
1 shutdown:
[NAME
] shutdown - bring the system down
SYNOPSIS
/sbin/shutdown [-t sec] [-arkhncfF] time [warning-message]
DESCRIPTION
shutdown brings the system down in a secure way.&nb ......
Linux内核版本有两种:稳定版和开发版.稳定的内核具有工业级的强度,可以广泛地应用和部署.新的稳定内核相对于较旧的只是修正一些bug或加入一些新的驱动程序.而开发版内核由于要试验各种解决方案,所以变化很快.这两种版本是相互关联,相互循环的.
Linux内核的命名机制:
num.nu ......
