linux 创建用户
useradd ccpit # 创建ccpit用户 passwd ccpit # 给这个用户设置密码
修改/etc/ssh/sshd_config文件
# $OpenBSD: sshd_config,v 1.100 2016/08/15 12:32:04 naddy Exp $ # This is the sshd server system-wide configuration file. See # sshd_config(5) for more information. # This sshd was compiled with PATH=/usr/local/bin:/usr/bin # The strategy used for options in the default sshd_config shipped with # OpenSSH is to specify options with their default value where # possible, but leave them commented. Uncommented options override the # default value. # If you want to change the port on a SELinux system, you have to tell # SELinux about this change. # semanage port -a -t ssh_port_t -p tcp #PORTNUMBER # #Port 22 #ListenAddress 0.0.0.0 #ListenAddress :: HostKey /etc/ssh/ssh_host_rsa_key #HostKey /etc/ssh/ssh_host_dsa_key HostKey /etc/ssh/ssh_host_ecdsa_key HostKey /etc/ssh/ssh_host_ed25519_key # Ciphers and keying #RekeyLimit default none # Logging #LogLevel INFO # Authentication: #LoginGraceTime 2m StrictModes no #MaxAuthTries 6 #MaxSessions 10 RSAAuthentication yes PubkeyAuthentication yes # The default is to check both .ssh/authorized_keys and .ssh/authorized_keys2 # but this is overridden so installations will only check .ssh/authorized_keys AuthorizedKeysFile .ssh/authorized_keys #AuthorizedPrincipalsFile none #AuthorizedKeysCommand none #AuthorizedKeysCommandUser nobody # For this to work you will also need host keys in /etc/ssh/ssh_known_hosts #HostbasedAuthentication no # Change to yes if you don't trust ~/.ssh/known_hosts for # HostbasedAuthentication #IgnoreUserKnownHosts no # Don't read the user's ~/.rhosts and ~/.shosts files #IgnoreRhosts yes # To disable tunneled clear text passwords, change to no here! #PermitEmptyPasswords no # Change to no to disable s/key passwords #ChallengeResponseAuthentication yes ChallengeResponseAuthentication no # Kerberos options #KerberosAuthentication no #KerberosOrLocalPasswd yes #KerberosTicketCleanup yes #KerberosGetAFSToken no #KerberosUseKuserok yes # GSSAPI options GSSAPIAuthentication yes GSSAPICleanupCredentials no #GSSAPIStrictAcceptorCheck yes #GSSAPIKeyExchange no #GSSAPIEnablek5users no # Set this to 'yes' to enable PAM authentication, account processing, # and session processing. If this is enabled, PAM authentication will # be allowed through the ChallengeResponseAuthentication and # PAM authentication via ChallengeResponseAuthentication may bypass # If you just want the PAM account and session checks to run without # and ChallengeResponseAuthentication to 'no'. # WARNING: 'UsePAM no' is not supported in Red Hat Enterprise Linux and may cause several # problems. UsePAM yes #AllowAgentForwarding yes #AllowTcpForwarding yes #GatewayPorts no X11Forwarding yes #X11DisplayOffset 10 #X11UseLocalhost yes #PermitTTY yes #PrintMotd yes #PrintLastLog yes #TCPKeepAlive yes #UseLogin no #UsePrivilegeSeparation sandbox #PermitUserEnvironment no #Compression delayed #ClientAliveInterval 0 #ClientAliveCountMax 3 #ShowPatchLevel no #PidFile /var/run/sshd.pid #MaxStartups 10:30:100 #PermitTunnel no #ChrootDirectory none #VersionAddendum none # no default banner path #Banner none # Accept locale-related environment variables AcceptEnv LANG LC_CTYPE LC_NUMERIC LC_TIME LC_COLLATE LC_MONETARY LC_MESSAGES AcceptEnv LC_PAPER LC_NAME LC_ADDRESS LC_TELEPHONE LC_MEASUREMENT AcceptEnv LC_IDENTIFICATION LC_ALL LANGUAGE AcceptEnv XMODIFIERS # override default of no subsystems Subsystem sftp /usr/libexec/openssh/sftp-server # Example of overriding settings on a per-user basis #Match User anoncvs # X11Forwarding no # AllowTcpForwarding no # PermitTTY no # ForceCommand cvs server UseDNS no AddressFamily inet PermitRootLogin no SyslogFacility AUTHPRIV PasswordAuthentication no AllowUsers ccpit
在/home/ccpit 下生成ssh_key
把id_rsa 内容复制进authorized_keys (没有需要先创建authorized_keys文件)
cat id_rsa >> authorized_keys
systemctl restart sshd.service
退出重新登录即可
常用选项
UseDNS no AddressFamily inet PermitRootLogin no #SyslogFacility用来设定在记录来自sshd的消息的时候，是否给出“facility code” SyslogFacility AUTHPRIV #PasswordAuthentication用来设置是否开启密码验证机制，如果用密码登录系统，则设置yes PasswordAuthentication no #指定允许通过远程访问的用户，多个用户以空格隔开 AllowUsers root #X11Forwarding 用来设置是否允许X11转发 X11Forwarding yes #设置是否通过PAM验证 UsePAM yes #GSSAPIAuthentication 指定是否允许基于GSSAPI的用户认证，默认为no GSSAPIAuthentication yes #GSSAPICleanupCredentials 设置是否在用户退出登录是自动销毁用户的凭证缓存 GSSAPICleanupCredentials no #ChallengeResponseAuthentication 是否允许质疑-应答(challenge-response)认证 ChallengeResponseAuthentication no #RSAAuthentication用来设置是否开启RSA密钥验证 RSAAuthentication yes #PubkeyAuthentication用来设置是否开启公钥验证，如果使用公钥验证的方式登录时，则设置为yes PubkeyAuthentication yes #AuthorizedKeysFile用来设置公钥验证文件的路径，与PubkeyAuthentication配合使用,默认值是".ssh/authorized_keys" AuthorizedKeysFile .ssh/authorized_keys #StrictModes用来设置ssh在接收登录请求之前是否检查用户根目录和rhosts文件的权限和所有权 StrictModes no #MaxAuthTries 用来设置最大失败尝试登陆次数为6 #MaxAuthTries 6