点击下方“民工哥技术之路”，选择“设为星标”
回复“1024”获取独家整理的学习资料！
昨日推荐：每天学一个 Linux 命令（58）：telnet
命令简介
ssh ( Secure Shell )命令是用于安全登录到远程系统的协议，它可用于在远程服务器上记录或执行命令。
ssh（SSH 客户端）是用于登录到远程计算机并在远程计算机上执行命令的程序。可以在不安全的网络中于两个不受信任的主机之间提供安全的加密通信。
语法格式
ssh [OPTIONS] [-p PORT] [USER@]HOSTNAME [COMMAND]
选项说明
-
-4 #强制ssh协议只使用IPv4地址
-
-6 #强制ssh协议只使用IPv6地址
-
-A #启用来自身份验证代理的连接转发
-
-a #禁用身份验证代理连接的转发
-
-B bind_interface #绑定到的地址 bind_interface在尝试连接到目标主机之前
-
-b bind_address #使用 bind_address在本地计算机上作为连接的源地址
-
-C #请求压缩所有数据
-
-c cipher_spec #指定用于加密会话的密码规范
-
-D [bind_address：] 端口 #指定本地“动态”应用程序级端口转发
-
-E log_file #将调试日志附加到 log_file 而非标准错误
-
-e escape_char #设置带有pty的会话的转义字符（默认值：
' ~'）
-
-F 配置文件 #指定每用户ssh的配置文件
-
-f #配置ssh在执行命令之前将请求转到后台
-
-g #允许远程主机连接到本地转发的端口
-
-i identity_file #指定从这个文件中去读取用于公共密钥身份验证的标识（私有密钥）
-
-K #启用基于GSSAPI的身份验证
-
-k #禁用将GSSAPI凭据
-
-L local_socket：remote_socket #指定将与本地（客户端）主机上给定的TCP端口或Unix套接字的连接转发到远程的给定主机和端口或Unix套接字。
-
-N #禁止执行远程命令
-
-p port #指定SSH连接端口
-
-q #静默模式
-
-s #用于请求调用远程系统上的子系统
-
-T #禁用分配伪终端
-
-t #强制分配伪终端
-
-V #打印SSH版本号并退出
-
-v #详细模式（输出SSH连接的过程信息）
-
-X #启用X11转发
-
-x #禁用X11转发
-
-Y #启用受信任的X11转发
-
-y #指定发送日志信息 syslog（
3）系统模块
应用举例
连接到远程主机
-
ssh username@remote_host
-
-
#ssh 使用特定身份（私钥）连接到远程主机
-
ssh -i path/to/key_file username@remote_host
使用特定端口连接到远程主机
ssh username@remote_host -p 9999
用SSH连接到远程服务器上再运行命令
-
ssh remote_host command
-
[root@centos7 ~]# ssh
192.168
.1
.199 ls
-
The authenticity of host
'192.168.1.199 (192.168.1.199)' can
't be established.
-
ECDSA key fingerprint is SHA256:mF2QLxkGH/mWhHu/NlaKOrx4nKkyVvhYV6BRPA8TdEk.
-
ECDSA key fingerprint is MD5:a1:91:03:6b:9a:91:f6:c3:cf:19:06:32:19:b9:85:8e.
-
Are you sure you want to continue connecting (yes/no)? yes
-
Warning: Permanently added '
192.168
.1
.199
' (ECDSA) to the list of known hosts.
-
root@192.168.1.199's password:
-
anaconda-ks.cfg
-
dos_test.txt
-
goinception
-
goInception-linux-amd64-v1
.2
.3.tar.gz
-
httpd
-
httpd
-2.4
.46
-
httpd
-2.4
.46.tar.gz
-
mingongge.file
-
mingongge.z01
-
mingongge.z02
-
mingongge.zip
-
testdir
-
test.txt
查看一下SSH远程登录过程的详细信息
-
[root@centos7 ~]# ssh -v
192.168
.1
.199 -p
22
-
OpenSSH_7
.4p1, OpenSSL
1.0
.2k-fips
26 Jan
2017
-
debug1: Reading configuration data /etc/ssh/ssh_config
-
debug1: /etc/ssh/ssh_config line
58: Applying options
for *
-
debug1: Connecting to
192.168
.1
.199 [
192.168
.1
.199] port
22.
-
debug1: Connection established.
-
debug1: permanently_set_uid:
0/
0
-
debug1: key_load_public: No such file or directory
-
debug1: identity file /root/.ssh/id_rsa
type
-1
-
debug1: key_load_public: No such file or directory
-
debug1: identity file /root/.ssh/id_rsa-cert
type
-1
-
debug1: key_load_public: No such file or directory
-
debug1: identity file /root/.ssh/id_dsa
type
-1
-
debug1: key_load_public: No such file or directory
-
debug1: identity file /root/.ssh/id_dsa-cert
type
-1
-
debug1: key_load_public: No such file or directory
-
debug1: identity file /root/.ssh/id_ecdsa
type
-1
-
debug1: key_load_public: No such file or directory
-
debug1: identity file /root/.ssh/id_ecdsa-cert
type
-1
-
debug1: key_load_public: No such file or directory
-
debug1: identity file /root/.ssh/id_ed25519
type
-1
-
debug1: key_load_public: No such file or directory
-
debug1: identity file /root/.ssh/id_ed25519-cert
type
-1
-
debug1: Enabling compatibility mode
for protocol
2.0
-
debug1: Local version
string SSH
-2.0-OpenSSH_7
.4
-
debug1: Remote protocol version
2.0, remote software version OpenSSH_7
.4
-
debug1: match: OpenSSH_7
.4 pat OpenSSH* compat
0x04000000
-
debug1: Authenticating to
192.168
.1
.199:
22 as
'root'
-
debug1: SSH2_MSG_KEXINIT sent
-
debug1: SSH2_MSG_KEXINIT received
-
debug1: kex: algorithm: curve25519-sha256
-
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
-
debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
-
debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none
-
debug1: kex: curve25519-sha256 need=
64 dh_need=
64
-
debug1: kex: curve25519-sha256 need=
64 dh_need=
64
-
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
-
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:mF2QLxkGH/mWhHu/NlaKOrx4nKkyVvhYV6BRPA8TdEk
-
debug1: Host
'192.168.1.199' is known and matches the ECDSA host key.
-
debug1: Found key in /root/.ssh/known_hosts:
1
-
debug1: rekey after
134217728 blocks
-
debug1: SSH2_MSG_NEWKEYS sent
-
debug1: expecting SSH2_MSG_NEWKEYS
-
debug1: SSH2_MSG_NEWKEYS received
-
debug1: rekey after
134217728 blocks
-
debug1: SSH2_MSG_EXT_INFO received
-
debug1: kex_input_ext_info: server-sig-algs=<rsa-sha2
-256,rsa-sha2
-512>
-
debug1: SSH2_MSG_SERVICE_ACCEPT received
-
debug1: Authentications that can
continue: publickey,gssapi-keyex,gssapi-with-mic,password
-
debug1: Next authentication method: gssapi-keyex
-
debug1: No valid Key exchange context
-
debug1: Next authentication method: gssapi-with-mic
-
debug1: Unspecified GSS failure. Minor code may provide more information
-
No Kerberos credentials available (
default cache: KEYRING:persistent:
0)
-
-
debug1: Unspecified GSS failure. Minor code may provide more information
-
No Kerberos credentials available (
default cache: KEYRING:persistent:
0)
-
-
debug1: Next authentication method: publickey
-
debug1: Trying private key: /root/.ssh/id_rsa
-
debug1: Trying private key: /root/.ssh/id_dsa
-
debug1: Trying private key: /root/.ssh/id_ecdsa
-
debug1: Trying private key: /root/.ssh/id_ed25519
-
debug1: Next authentication method: password
-
root@
192.168
.1
.199
's password:
-
debug1: Authentication succeeded (password).
-
Authenticated to 192.168.1.199 ([192.168.1.199]:22).
-
debug1: channel 0: new [client-session]
-
debug1: Requesting no-more-sessions@openssh.com
-
debug1: Entering interactive session.
-
debug1: pledge: network
-
debug1: client_input_global_request: rtype hostkeys-00@openssh.com want_reply 0
-
debug1: Sending environment.
-
debug1: Sending env LANG = en_US.UTF-8
-
Last login: Sun Jan 17 14:26:28 2021 from 192.168.1.93
-
推荐阅读 点击标题可跳转
比 ELK 更轻量、高效！企业级日志平台后起之秀 Graylog！
CentOS 搭建 Vsftpd 服务，一次性成功，收藏了！
转载：https://blog.csdn.net/mingongge/article/details/114695980
查看评论