Ubuntu下安装rsh实现无密码访问详解
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
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apt-get install rsh-client rsh-server xinetd
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2 ubuntu下原来没有/etc/xinetd.d/rsh文件，新建并添加内容
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# 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
}
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3 重启动
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root@block2:~# /etc/init.d/xinetd restart
xinetd stop/waiting
xinetd start/running, process 26181
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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
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root@block1:~# cat .rhosts
compute root
block1 root
block2 root
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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
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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
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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
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root@compute:~# rsh block2 date
Thu Mar 30 16:38:42 CST 2017
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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。
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
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