ssh (secure shell),ssh協議支持登錄及文件的傳輸加密防止數據截留！

01、下載

https://www.ssh.com/                                              ###商業

https://www.openssl.org                                           ###開源

http://www.openssh.com/                                         ###開源ssh

http://www.openssh.com/portable.html

http://www.ftp.ne.jp/OpenBSD/OpenSSH/portable/    ###日本

https://www.openssl.org/source/snapshot/

02、安裝

openssh

openssh-server

openssh-client

yum install -y openssh-server

03、測試

/etc/init.d/sshd   start

service sshd   start| restart | stop

配置文件

/etc/ssh/ssh_config

/etc/ssh/sshd_config

詳細配置文件說明：http://www.cnblogs.com/xiaochina/p/5802008.html

ssh-keygen -t  rsa |dsa   #生成公私秘鑰

id_rsa     私鑰                                                 #私鑰很關鍵不要隨意傳播

id_rsa.pub    公鑰    --- authorized_keys

cat id_rsa.pub >>/root/.ssh/authorized_keys  #公鑰位于target_server(登錄的目標機器)

ssh對登陸限制：http://www.cnblogs.com/xiaochina/p/5920057.html

04、ssh登錄

#ssh相關命令

ss                       sshd                     sssd
ssh                      ssh-keygen               sss_ssh_authorizedkeys
ssh-add                  ssh-keyscan              sss_ssh_knownhostsproxy
ssh-agent                ssltap                   
ssh-copy-id              sss_cache

[root@mvpbang ~]# ssh
usage: ssh [-1246AaCfgKkMNnqsTtVvXxYy] [-b bind_address] [-c cipher_spec]
           [-D [bind_address:]port] [-e escape_char] [-F configfile]
           [-I pkcs11] [-i identity_file]
           [-L [bind_address:]port:host:hostport]
           [-l login_name] [-m mac_spec] [-O ctl_cmd] [-o option] [-p port]
           [-R [bind_address:]port:host:hostport] [-S ctl_path]
           [-W host:port] [-w local_tun[:remote_tun]]
           [user@]hostname [command]

ssh root@172.24.0.24

ssh -l mvp  172.24.0.24

ssh   172.24.0.24     #讀取當前用戶名作為登錄用戶名

/root/.ssh/known_hosts    #本機ssh遠程登錄Linux保存遠程機器的公鑰，用于安全傳輸數據

05、scp文件傳輸

[root@mvpbang ~]# scp
usage: scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]
           [-l limit] [-o ssh_option] [-P port] [-S program]
           [[user@]host1:]file1 ... [[user@]host2:]file2

scp   xxx   root@172.24.0.24:~              #上傳

scp  root@172.24.0.24:/etc/passwd   ~  #下載

06、sftp安全傳輸ftp

[root@mvpbang ~]# sftp

usage: sftp [-1Cv] [-B buffer_size] [-b batchfile] [-F ssh_config]
            [-o ssh_option] [-P sftp_server_path] [-R num_requests]
            [-S program] [-s subsystem | sftp_server] host
       sftp [user@]host[:file ...]
       sftp [user@]host[:dir[/]]
       sftp -b batchfile [user@]host

sftp用法跟ftp基本沒啥差異

總結

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