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yum install openssh-server openssh-client openssh-askpass Redhat Enterprise Linux
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/etc/ssh/moduli Diffie-Hellman groups used for the Diffie-Hellman key exchange
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/etc/ssh/ssh_config default SSH client configuration file
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/etc/ssh/sshd_config configuration file for the sshd daemon
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/etc/ssh/ssh_host_ecdsa_key ECDSA private key used by the sshd daemon
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/etc/ssh/ssh_host_ecdsa_key.pub ECDSA public key used by the sshd daemon
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/etc/ssh/ssh_host_rsa_key RSA private key used by the sshd daemon
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/etc/ssh/ssh_host_rsa_key.pub RSA public key used by the sshd daemon
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/etc/pam.d/sshd PAM configuration file for the sshd daemon
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/etc/sysconfig/sshd Configuration file for the sshd service
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~/.ssh/authorized_keys list of authorized public keys for servers
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~/.ssh/id_ecdsa ECDSA private key of the user
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~/.ssh/id_ecdsa.pub ECDSA public key of the user
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~/.ssh/id_rsa RSA private key of the user
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~/.ssh/id_rsa.pub RSA public key of the user
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~/.ssh/known_hosts host keys of SSH servers accessed by the user
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systemctl start sshd.service start the sshd daemon
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systemctl stop sshd.service stop the running sshd daemon
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systemctl enable sshd.service start the sshd daemon at boot
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/etc/systemd/system/sshd.service.d/local.conf
[Unit] Wants=network-online.target After=network-online.target override default service unit for DHCP network |
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/etc/ssh/sshd_config
PasswordAuthentication No enforce key based authentication |
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setsebool -P use_nfs_home_dirs 1 use key based authentication with NFS-mounted home directory
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ssh-keygen -l -f /etc/ssh/ssh_host_ecdsa_key.pub show remote server fingerprint
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ssh-keygen -l -f /etc/ssh/ssh_host_ecdsa_key.pub -EM md5 show remote server MD5 fingerprint
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/etc/ssh/sshd_config
AllowTcpForwarding No disable port forwarding |
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ssh-keygen -t rsa generate RSA keypair
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ssh-copy-id user@host copy the public RSA key to remote host
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ssh-keygen -t ecdsa generate ECDSA keypair
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ssh-copy-id user@host copy the public ECDSA key to remote host
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ssh-add save passphrase for shell prompt
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ssh-keygen -R host remove the key for the host
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ssh user@host command execute a command on the remote machine
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scp /path/to/localfile user@host:/path/to/remotefile transfer a local file to a remote system
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scp /path/to/* user@host:/path/to/* transfer a multiple files to a remote system
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scp user@host:/path/to/remotefile /path/to/localfile transfer a remote file to the local system
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sftp user@host secure FTP to a remote system
ls list the content of remote directory cd change remote working directory mkdir create remote directory rmdir remove remote directory put transfer localfile to a remote machine get transfer remotefile from a remote system |
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ssh -Y user@host open an X11 session over an SSH connection (X window system must be installed on remote system)
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ssh -L local-port:remote-hostname:remote-port user@host create TCP/IP port forwarding channel
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