Linux目录结构

特务

cat是concatenate（连接）的缩写，用过c的人应该都知道strcat吧。cat原本的作用是将几个文件和起来的命令，如
cat file1 file2 file3 > file
就是把file1 file2 file3合并成file。

goodwizard

Post by 特务;314733
昨晚查了一下，1965年的MIT CTSS系统上开始出现"runcom"概念，"run com"自己是run commands的缩写，就是把一些命令全放在一个文件里一起执行，大致相当于dos下的.bat文件。而rc又是runcom的缩写。

to add to this in the etc/rc.d folder there is folders, such as rc.0 or rc.6. In each of these folder are programs like the x server for gui, or other essential programs. In Linux there is runlevel, just like how windows have safe mode. there are 7 levels and in the rc.x folders are the programs that is going to be initialized when you run a level.

0          /etc/rc.d/rc0.d/          shutdown/halt system
1         /etc/rc.d/rc1.d/         Single user mode
2         /etc/rc.d/rc2.d/         Multiuser with no network services exported
3         /etc/rc.d/rc3.d/         Default text/console only start. Full multiuser
4         /etc/rc.d/rc4.d/         Reserved for local use. Also X-windows (Slackware/BSD)
5         /etc/rc.d/rc5.d/         XDM X-windows GUI mode (Redhat/System V)
6         /etc/rc.d/rc6.d/         Reboot

more information on this site.
http://www.yolinux.com/TUTORIALS/LinuxTutorialInitProcess.html

brokee

好文啊，谢谢楼主

zhaojichang

永远的经典。。。