Veritas Linux Cluster
Get Redhat Enterprise 3.0 from:
Your local RedHat rep�
Get Veritas’ VCS and VM products from:
ftp://ftp.veritas.com/pub/products/fst_ha.lxrt2.2.redhatlinux.tar.gz
ftp://ftp.veritas.com/pub/products/fst_ha.lxrt2.2MP1.redhatlinux.tar.gz
You will need a temporary key to complete this install. Please
contact your local Veritas account team or email me at
rich@robotthoughts.com
Install RedHat Enterprise Linux 3.0:
Put CD1 in your CD drive and reboot.
Make sure you select the smb-server packages during the install. You need that package to run Samba for Windows file-sharing.
Follow the install for your hardware and set up the boot disk to
your liking. Be sure and leave some extra room on the disk (a least an
extra 2-5 Gb) if you plan to encapsulate the boot volume.
Pay attention to how you setup the Ethernet cards. In Linux your
cards will most likely be eth0, eth1, eth2. In my case I had two
on-board Ethernet ports and one PCI based Ethernet card. Most Linux
installs will recognize the on-board NIC ports first and then any PCI
slots. During the install, I configured the public interface as eth2
and left the on-board cards (eth0 and eth1) for the heartbeat network.
Keep that in mind for the VCS install later.
Finally, you should try to configure X for your hardware. This will
come in handy later for running the GUIs locally. Of course, you can
always connect remotely from another workstation.
After both systems have rebooted, make sure you add the other node�s
hostname to the /etc/hosts file on both machines. So linuxnode1 will
look like this and linuxnode2 should be just the opposite:
[root@linuxnode1]# cat /etc/hosts
127.0.0.1 linuxnode1 localhost.localdomain localhost
192.168.1.113 linuxnode2
Install VM:
Time to install the RPMs. Order is important.
cd to the rpms directory on the fst_ha.lxrt2.2 CD and run this command:
rpm -Uvh VRTSvlic-3.00-008.i686.rpm
VRTSvxvm-3.2-update4_RH.i686.rpm VRTSvmdoc-3.2-update4
相关文档：
Linux内核中用于同步的几种机制集中起来分析，强调了它们之间在实现和使用上的不同。
同步通常是为了达到多线程协同的目的而设计的一种机制，通常包含异步信号机制和互斥机制作为其实现的底层。在Linux 2.4内核中也有相应的技术实现，包括信号量、自旋锁、原子操作和等待队列，其中原子操作和等待队列又是实现信号量的 ......
linux
下用C实现‘CAT’的功能
#include<stdio.h>
int main(int argc,char *argv[]){
FILE *file;
char buf[1024],name[20];
int n;
if(argc != 2){
printf("wrong argument\n");
return 1;
}
file=fopen(argv[1],"r");
if(file==NULL){
printf("Cant't open!\n&quo ......
功能说明：检测主机。
语 法：ping
[-dfnqrRv][-c<完成次数>][-i<间隔秒数>][-I<网络界面>][-l<前置载
入>][-p<范本样式>][-s<数据包大小>][-t<存活数值>][主机名称或IP地址]
补充说明：执行ping指令会使用ICMP传输协议，发出要求回应的 ......
add user：
[root@localhost ~]# useradd test
[root@localhost ~]# passwd test
add user to a group:
e.g. add nexus to admin
useradd -g admin nexus
default role：
[root@localhost ~]# useradd -D
GROUP=100
HOME=/home
INACTIVE=-1
EXPIRE=
SHELL=/bin/bash
SKEL=/etc/skel
CREATE_MAIL_SPOOL=no
de ......
想要通过普通的静态策略路由来实现电信网通双线基本上是不可能的，因为那将需要维护相当大的一个IP段的数据库，而且还需要随时更新才能保证效果。
后来听前辈们说，可以采用基于源地址路由的方式来处理，让进来的数据，从哪个IP进来就从哪个IP返回。
下面就是一个在生产中得到了实际应用的脚本：
====================== ......
