31st days-two examples, two examples on 31st days

31st days-two examples, two examples on 31st days

1. remotely view information on server B on server

[oldboy@A ~]$ ssh 192.168.1.113 hostnameB[oldboy@A ~]$ ssh 192.168.1.113 uname -r2.6.32-431.el6.x86_64[oldboy@A ~]$ ssh 192.168.1.113 uname -aLinux B 2.6.32-431.el6.x86_64 #1 SMP Sun Nov 10 22:19:54 EST 2013 x86_64 x86_64 x86_64 GNU/Linux[oldboy@A ~]$ ssh 192.168.1.113 free             total       used       free     shared    buffers     cachedMem:       1020348     174508     845840          0      16092      61660-/+ buffers/cache:      96756     923592Swap:      1023992          0    1023992[oldboy@A ~]$ ssh 192.168.1.113 uptime 07:03:23 up 5 min,  1 user,  load average: 0.01, 0.08, 0.06[oldboy@A ~]$ ssh 192.168.1.113 cat /etc/redhat-releaseRed Hat Enterprise Linux Server release 6.5 (Santiago)

2. Enable trusted CT to distribute keys to B and C in batches without Interactive Authentication, that is, to distribute keys for non-interactive batch publishing before password-free authentication is established.
Run:

[oldboy@B ~]$ lsfenfa_sshkey.exp  fenfa_sshkey.sh  iplist[oldboy@B ~]$ sh fenfa_sshkey.sh[oldboy@B ~]$ cat fenfa_sshkey.sh#!/bin/sh./etc/init.d/functionsfor ip in `cat iplist`do#   expect fenfa_sshkey.exp ~/.ssh/id_dsa.pub $ip >/dev/null 2>&1    expect fenfa_sshkey.exp ~/.ssh/id_dsa.pub $ip    if [ $? -eq 0 ]    then        action "$ip" /bin/true    else        action "$ip" /bin/false    fidone[oldboy@B .ssh]$ cat fenfa_sshkey.exp#!/usr/bin/expectif { $argc !=2 } {    send_user "usage: expect fenfa_sshkey.exp file host\n"    exit}#define varset file [lindex $argv 0]set host [lindex $argv 1]set password "lrz0412"#spawn scp /etc/hosts root@10.0.0.142:/etc/hosts#spawn scp -P52113 $file oldboy@$host:$dir#spawn ssh-copy-id -i $file "-p 52113 oldboy@$host"spawn ssh-copy-id -i $file "-p 22 oldboy@$host"expect {    "yes/no"    　 {send "yes\r";exp_continue}    "*password"    {send "$password\r"}}expect eofexit -onexit {    send_user "bye!"}