paramiko是基于Python实现的SSH2远程安全连接，支持认证及密钥方式。可以实现远程命令执行、文件传输、中间SSH代理等功能，相对于Pexpect，封装的层次更高，更贴近SSH协议的功能
官网地址：http://www.paramiko.org/installing.html
http://docs.paramiko.org/en/2.4/
https://pypi.org/project/paramiko/
二、paramiko安装
root@localhost ~]# pip3 install paramiko
简单实现远程SSH运行命令示例
import paramiko hostname = '192.168.1.5' username = 'root' password = '123123' paramiko.util.log_to_file('syslogin.log') #发送paramiko日志到syslogin.log文件 ssh = paramiko.SSHClient() #创建一个SSH客户端client对象 ssh.load_system_host_keys() #获取客户端host_keys,默认~/.ssh/known_hosts,非默认路径需指定ssh.load_system_host_keys(/xxx/xxx) ssh.connect(hostname=hostname,username=username,password=password) #创建SSH连接 stdin,stdout,stderr = ssh.exec_command('free -h') #调用远程执行命令方法exec_command() print(stdout.read().decode('utf-8')) #打印命令执行结果，得到Python列表形式，可以使用stdout_readlines() ssh.close()
程序运行结果如下图所示：
DEB [20190809-13:44:34.792] thr=1 paramiko.transport: starting thread (client mode): 0x54a13f28 DEB [20190809-13:44:34.792] thr=1 paramiko.transport: Local version/idstring: SSH-2.0-paramiko_2.6.0 DEB [20190809-13:44:34.792] thr=1 paramiko.transport: Remote version/idstring: SSH-2.0-OpenSSH_7.4 INF [20190809-13:44:34.792] thr=1 paramiko.transport: Connected (version 2.0, client OpenSSH_7.4) DEB [20190809-13:44:34.792] thr=1 paramiko.transport: kex algos:['curve25519-sha256', 'curve25519-sha256@libssh.org', 'ecdh-sha2-nistp256', 'ecdh-sha2-nistp384', 'ecdh-sha2-nistp521', 'diffie-hellman-group-exchange-sha256', 'diffie-hellman-group16-sha512', 'diffie-hellman-group18-sha512', 'diffie-hellman-group-exchange-sha1', 'diffie-hellman-group14-sha256', 'diffie-hellman-group14-sha1', 'diffie-hellman-group1-sha1'] server key:['ssh-rsa', 'rsa-sha2-512', 'rsa-sha2-256', 'ecdsa-sha2-nistp256', 'ssh-ed25519'] client encrypt:['chacha20-poly1305@openssh.com', 'aes128-ctr', 'aes192-ctr', 'aes256-ctr', 'aes128-gcm@openssh.com', 'aes256-gcm@openssh.com', 'aes128-cbc', 'aes192-cbc', 'aes256-cbc', 'blowfish-cbc', 'cast128-cbc', '3des-cbc'] server encrypt:['chacha20-poly1305@openssh.com', 'aes128-ctr', 'aes192-ctr', 'aes256-ctr', 'aes128-gcm@openssh.com', 'aes256-gcm@openssh.com', 'aes128-cbc', 'aes192-cbc', 'aes256-cbc', 'blowfish-cbc', 'cast128-cbc', '3des-cbc'] client mac:['umac-64-etm@openssh.com', 'umac-128-etm@openssh.com', 'hmac-sha2-256-etm@openssh.com', 'hmac-sha2-512-etm@openssh.com', 'hmac-sha1-etm@openssh.com', 'umac-64@openssh.com', 'umac-128@openssh.com', 'hmac-sha2-256', 'hmac-sha2-512', 'hmac-sha1'] server mac:['umac-64-etm@openssh.com', 'umac-128-etm@openssh.com', 'hmac-sha2-256-etm@openssh.com', 'hmac-sha2-512-etm@openssh.com', 'hmac-sha1-etm@openssh.com', 'umac-64@openssh.com', 'umac-128@openssh.com', 'hmac-sha2-256', 'hmac-sha2-512', 'hmac-sha1'] client compress:['none', 'zlib@openssh.com'] server compress:['none', 'zlib@openssh.com'] client lang:[''] server lang:[''] kex follows?False DEB [20190809-13:44:34.807] thr=1 paramiko.transport: Kex agreed: curve25519-sha256@libssh.org DEB [20190809-13:44:34.807] thr=1 paramiko.transport: HostKey agreed: ssh-rsa DEB [20190809-13:44:34.807] thr=1 paramiko.transport: Cipher agreed: aes128-ctr DEB [20190809-13:44:34.807] thr=1 paramiko.transport: MAC agreed: hmac-sha2-256 DEB [20190809-13:44:34.807] thr=1 paramiko.transport: Compression agreed: none DEB [20190809-13:44:34.807] thr=1 paramiko.transport: kex engine KexCurve25519 specified hash_algo <built-in function openssl_sha256> DEB [20190809-13:44:34.807] thr=1 paramiko.transport: Switch to new keys ... DEB [20190809-13:44:34.839] thr=1 paramiko.transport: userauth is OK INF [20190809-13:44:44.883] thr=1 paramiko.transport: Authentication (password) successful! DEB [20190809-13:44:44.883] thr=2 paramiko.transport: [chan 0] Max packet in: 32768 bytes DEB [20190809-13:44:44.883] thr=1 paramiko.transport: Received global request "hostkeys-00@openssh.com" DEB [20190809-13:44:44.883] thr=1 paramiko.transport: Rejecting "hostkeys-00@openssh.com" global request from server. DEB [20190809-13:44:44.946] thr=1 paramiko.transport: [chan 0] Max packet out: 32768 bytes DEB [20190809-13:44:44.946] thr=1 paramiko.transport: Secsh channel 0 opened. DEB [20190809-13:44:44.946] thr=1 paramiko.transport: [chan 0] Sesch channel 0 request ok DEB [20190809-13:44:45.102] thr=1 paramiko.transport: [chan 0] EOF received (0) DEB [20190809-13:44:45.102] thr=1 paramiko.transport: [chan 0] EOF sent (0)