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Opensource.com: Advanced SSH Cheat Sheet
Most people know SSH as a tool for remote login, which it is, but it can be used in many other ways.
Create a SOCKS proxy to tunnel your web traffic (like when you’re traveling)
ssh -D <port> <remote_host>
Set your web browser to use localhost:<port> as the proxy.
Connect to a Windows RDP host behind a bastion server
ssh -L <port>:<target_host>:3389 <bastion_server>
Set your RDP client to connect to localhost:<port>
Connect to your remote machine’s VNC server without opening the VNC port
ssh -L 5901:localhost:5901 <remote_host>
Set your VNC client to to connect to localhost:5901
You can follow this pattern with other ports you don’t want to open to the world: LDAP (389), 631 (CUPS), 8080 (alternate HTTP), and so on.
Generate a new SSH key pair
ssh-keygen
Update the passphrase on an existing SSH key-pair
ssh-keygen -p
Copy a public SSH key to a remote host
ssh-copy-id -i <identity file> <remote_host>
SSH has a lot of command-line options, but if you use the same options for a host regularly, you can put an entry in the SSH configuration file (${HOME}/.ssh/config) instead. For example:
host myhouse
User itsme
HostName house.example.com
Then you can type ssh myhouse instead of ssh itsme@house.example.com.
Here are common command-line options and their configuration file equivalents. Some are simplified for common use cases. See the ssh(1) and ssh_config(5) manual pages for full details.
| Command Line | Configuration File | Description |
|---|---|---|
| -l <login name> | User <login name>The login name on the remote machine. | |
| -i <identity file> | IdentityFile <identity file> | The identity file (SSH keypair) to use for authentication. |
| -p <remote port> | Port <remote port> | The port on which the remote SSH daemon is listening. (default: 22) |
| -C | Compression <yes|no> | Compress traffic between hosts. (default: no) |
| -D <port> | DynamicForward <port> | Forward traffic on the local port to the remote machine. |
| -X | ForwardX11 <yes|no> | Display X11 graphical programs from your remote host on the local host. (default: no) |
| -A | ForwardAgent <yes|no> | Forward the authentication agent to the remote host. This is helpful if you’ll then connect to a third host. (default: no) |
| -4 (use IPv4 only) -6 (use IPv6 only) | AddressFamily <any|inet4|inet6> | Specify whether to use IPv4 or IPv6 only. |
| -L <local port>:<target host>:<target port> | LocalForward <local port>:<target host>:<target port> | Forward local traffic on the specified to port to the remote host and port. |
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作者简介：
Ben Cotton is a meteorologist by training and a high-performance computing engineer by trade. Ben works as a product marketing manger at Microsoft Azure focused on high performance computing. He is a Fedora user and contributor, co-founded a local open source meetup group, and is a member of the Open Source Initiative and a supporter of Software Freedom Conservancy. Find him on Twitter (@FunnelFiasco) or at FunnelFiasco.com.
via: https://opensource.com/sites/default/files/gated-content/cheat_sheet_ssh_v03.pdf
作者： BEN COTTON 译者：译者ID 校对：校对者ID