sshd默认配置

/etc/sshd_config

Include /etc/ssh/sshd_config.d/*.conf
HostKey /etc/ssh/ssh_host_rsa_key
HostKey /etc/ssh/ssh_host_ecdsa_key
HostKey /etc/ssh/ssh_host_ed25519_key
SyslogFacility AUTHPRIV
LogLevel INFO
PermitRootLogin yes
AllowUsers *
PubkeyAuthentication yes
PasswordAuthentication yes
#PermitEmptyPasswords yes
AuthorizedKeysFile .ssh/authorized_keys
HostbasedAuthentication yes
IgnoreUserKnownHosts yes
IgnoreRhosts yes
GSSAPIAuthentication no
GSSAPICleanupCredentials yes
UsePAM no
X11Forwarding yes
UseDNS no
AcceptEnv LANG LC_*
Subsystem	sftp	/usr/lib/openssh/sftp-server

/etc/ssh_config

Include /etc/ssh/ssh_config.d/*.conf
Host *
PasswordAuthentication yes
GSSAPIAuthentication yes
ForwardX11Trusted yes
IdentityFile ~/.ssh/id_rsa
IdentityFile ~/.ssh/id_dsa
IdentityFile ~/.ssh/id_ecdsa
IdentityFile ~/.ssh/id_ed25519
SendEnv LANG LC_*
HashKnownHosts yes

sudo ssh-keygen -A

ssh-keygen -t rsa

touch ~/.ssh/authorized_keys
cat ~/.ssh/id_rsa.pub > ~/.ssh/authorized_keys
chmod 700 ~/.ssh
chmod 600 ~/.ssh/*

sudo service sshd stop
sudo service sshd start
sudo service sshd status