Ubuntu下安装rsh实现无密码访问

系统管理员 2022-06-18 05:27 165阅读 0赞

一：环境

1.三台服务器ubuntu14.04， 主机名分别为compute，block1和blcok2

2.两台主机hosts文件都为：

root@compute:~\# cat /etc/hosts  
127.0.0.1 localhost  
192.168.4.132 compute  
192.168.4.133 block1  
192.168.4.134 block2

二：安装rsh和rsh-server（三台主机都安装），并设置启动rsh和rlogin服务

1 安装

apt-get install rsh-client rsh-server xinetd

2  ubuntu下原来没有/etc/xinetd.d/rsh文件，新建并添加内容

# default: on
    # descrīption: 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
    }
    
    /etc/xinetd.d/rlogin
    
    # default: on
    # descrīption: 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
    }
    
    /etc/xinetd.d/rexec
    
    # default: off
    # descrīption: Rexecd is the server for the rexec(3) routine.  The server \
    #       provides remote execution facilities with authentication based \
    #       on user names and passwords.
    service exec
    {
            disable = no
            socket_type             = stream
            wait                    = no
            user                    = root
            log_on_success          += USERID
            log_on_failure          += USERID
            server                  = /usr/sbin/in.rexecd
    }

3 重启动

root@block2:~# /etc/init.d/xinetd restart
    xinetd stop/waiting
    xinetd start/running, process 26181

三：建立信任文件，实现无密码访问配置

1.在root主目录下建立.rhosts文件，并在此文件内写入这两台主机的主机名

root@block1:~# cat .rhosts 
    compute	root
    block1	root
    block2	root

注：root 验证需要/root/.rhosts文件，普通用户需要/etc/hosts.equiv文件

2.在/etc目录下建立hosts.equiv文件，并在此文件内写入作为客户端主机的主机名

root@block1:~# cat /etc/hosts.equiv 
    # /etc/hosts.equiv: list  of  hosts  and  users  that are granted "trusted" r
    #		    command access to your system .
    compute

3 在文件/etc/securetty中

加入rsh rlogin rexec

四：配置完毕，验证配置

1.在compute服务器上直接输入rsh block1 date就可以在block1上无密码执行date命令

root@compute:~# rsh block2 date
    Thu Mar 30 16:38:42 CST 2017

2.在compute上直接输入rsh  block1就可以无密码登录block1

3.普通用户操作同root用户

4.还有rcp命令可以远程复制文件

至此rsh无密码访问配置完毕