在CentOS系统上怎样配置rsh,rcp,scp多节点互通

本篇文章为大家展示了在CentOS系统上怎样配置rsh,rcp,scp多节点互通，内容简明扼要并且容易理解，绝对能使你眼前一亮，通过这篇文章的详细介绍希望你能有所收获。

我们在使用CentOS系统时候，安装RAC时，需要配置各个节点的互信关系，使rsh、rlogin、rcp等命令不需要输入密码可以操作其他节点。除了按照管法rac安装文档中的方法配置ssh之外，还可以通过修改.rhosts等文件实现互信。在unix（如aix）中，可以简单修改/etc/hosts.equiv实现，但是Linux中比较麻烦，需要一些其他的步骤，下面我们来演示在CentOS系统中配置方法：

CentOS系统时需要在各个节点上完成如下操作

1、检查在CentOS系统中rsh-server包是否已经安装

[root@rac1 ~]# rpm -qa|grep -i ^rsh-server
rsh-server-0.17-40.el5

如果没有安装使用rpm -ivh 命令安装

2、确保/etc/xinetd.d/rlogin中存在disable = no这一行

[root@rac1 ~]# cat /etc/xinetd.d/rlogin  # default: on  # description: rlogind is the server for the rlogin(1) program. The server  # provides a remote login facility with authentication based on  # privileged port numbers from trusted hosts.  service login  {disable = no socket_type = stream wait = no user = root log_on_success += USERID  log_on_failure += USERID  server = /usr/sbin/in.rlogind}

3、确保/etc/xinetd.d/rsh中存在disable = no这一行

[root@rac1 ~]# cat /etc/xinetd.d/rsh  # default: on  # description: The rshd server is the server for the rcmd(3) routine and,  # consequently, for the rsh(1) program. The server provides  # remote execution facilities with authentication based on  # privileged port numbers from trusted hosts.  service shell  {  disable = no socket_type = stream wait = no user = root log_on_success += USERID  log_on_failure += USERID  server = /usr/sbin/in.rshd  }

4、在CentOS系统重启xinetd服务

[root@rac1 ~]# service xinetd restart
Stopping xinetd: [ OK ]
Starting xinetd: [ OK ]

5、在CentOS系统编辑/etc/securetty，确保存在rexec、rsh、rlogin三行

[root@rac1 ~]# cat /etc/securetty  console  vc/1  vc/2  vc/3  vc/4  vc/5  vc/6  vc/7  vc/8  vc/9  vc/10  vc/11  tty1  tty2  tty3  tty4  tty5  tty6  tty7  tty8  tty9  tty10  tty11  rexec  rsh  rlogin

6、在CentOS系统编辑/etc/hosts.equiv文件，如下所示

[root@rac1 ~]# cat /etc/hosts.equiv  +rac1 oracle  +rac2 oracle  +rac1-priv oracle  +rac2-priv oracle  +rac1 root  +rac2 root  +rac1-priv root  +rac2-priv root

7、在CentOS系统编辑/etc/hosts文件，如下所示

[root@rac1 ~]# cat /etc/hosts  # Do not remove the following line, or various programs  # that require network functionality will fail.  127.0.0.1 localhost.localdomain localhost  ::1 localhost6.localdomain6 localhost6   #public  192.168.2.101 rac1.localdomain rac1  192.168.2.102 rac2.localdomain rac2   #private  192.168.0.101 rac1-priv.localdomain rac1-priv  192.168.0.102 rac2-priv.localdomain rac2-priv   #virtual  192.168.2.111 rac1-vip.localdomain rac1-vip  192.168.2.112 rac2-vip.localdomain rac2-vip

8、在CentOS系统编辑~/.rhosts，如下所示

[root@rac1 ~]# cat ~/.rhosts
+rac1 root
+rac2 root
+rac1-priv root
+rac2-priv root

9、测试rlogin和rsh是否可以不用输入密码登录其他节点

[root@rac1 ~]# rlogin rac2  connect to address 192.168.2.102 port 543: Connection refused  Trying krb4 rlogin...  connect to address 192.168.2.102 port 543: Connection refused  trying normal rlogin (/usr/bin/rlogin)  Last login: Wed Jan 13 08:39:17 from rac1  [root@rac2 ~]# hostname  rac2.localdomain  [root@rac2 ~]# exit  logout  rlogin: connection closed.  [root@rac1 ~]# rsh rac2  connect to address 192.168.2.102 port 543: Connection refused  Trying krb4 rlogin...  connect to address 192.168.2.102 port 543: Connection refused  trying normal rlogin (/usr/bin/rlogin)  Last login: Wed Jan 13 08:47:22 from rac1  [root@rac2 ~]# hostname  rac2.localdomain  [root@rac2 ~]# exit  logout  rlogin: connection closed.

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