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1. ÔÚ»úÆ÷ClientÉÏrootÓû§Ö´ÐÐssh-keygenÃüÁÉú³É½¨Á¢°²È«ÐÅÈιØÏµµÄÖ¤Êé¡£
[root@Client root]# ssh-keygen -b 1024 -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa): <– Ö±½ÓÊäÈë»Ø³µ
Enter passphrase (empty for no passphrase): <– Ö±½ÓÊäÈë»Ø³µ
Enter same passphrase again: <– Ö±½ÓÊäÈë»Ø³µ
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is: ……
×¢Ò⣺ÔÚ³ÌÐòÌáʾÊäÈëpassphraseʱֱ½ÓÊäÈë»Ø³µ£¬±íʾÎÞÖ¤ÊéÃÜÂë¡£
ÉÏÊöÃüÁÉú³É˽Կ֤Êéid_rsaºÍ¹«Ô¿Ö¤Êéid_rsa.pub£¬´æ·ÅÔÚÓû§Ä¿Â¼µÄ.ssh×ÓĿ¼ÖС£
2. ½«¹«Ô¿Ö¤Êéid_rsa.pub¸´ÖƵ½»úÆ÷ServerµÄrootĿ¼µÄ.ssh×ÓĿ¼ÖУ¬Í¬Ê±½«ÎļþÃû¸ü»»Îªauthorized_keys¡£
[root@Client root]# scp -p .ssh/id_rsa.pub root@172.16.100.188:/root/.ssh/authorized_keys
root@192.168.3.206’s password: <– ÊäÈë»úÆ÷ServerµÄrootÓû§ÃÜÂë
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[root@Client root]# scp -p text root@192.168.3.206:/root
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#include <stdio.h>
#include <sys/socket.h>
#include <unistd.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <stdlib.h>
#include <time.h>
#define SERVER_PORT 20000 // define the defualt connect port id
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