一、環境
1.三臺服務器ubuntu14.04， 主機名分別為compute，block1和blcok2
2.兩臺主機hosts文件都為：
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、安裝rsh和rsh-server（三臺主機都安裝），并設置啟動rsh和rlogin服務
1 安裝
apt-get install rsh-client rsh-server xinetd
2 ubuntu下原來沒有/etc/xinetd.d/rsh文件，新建并添加內容
# 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 重啟動
root@block2:~# /etc/init.d/xinetd restart xinetd stop/waiting xinetd start/running, process 26181
三、建立信任文件，實現無密碼訪問配置
1.在root主目錄下建立.rhosts文件，并在此文件內寫入這兩臺主機的主機名
root@block1:~# cat .rhosts compute root block1 root block2 root
注：root 驗證需要/root/.rhosts文件，普通用戶需要/etc/hosts.equiv文件
2.在/etc目錄下建立hosts.equiv文件，并在此文件內寫入作為客戶端主機的主機名
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、配置完畢，驗證配置
1.在compute服務器上直接輸入rsh block1 date就可以在block1上無密碼執行date命令
root@compute:~# rsh block2 date Thu Mar 30 16:38:42 CST 2017
2.在compute上直接輸入rsh block1就可以無密碼登錄block1
3.普通用戶操作同root用戶
4.還有rcp命令可以遠程復制文件
至此rsh無密碼訪問配置完畢。
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