SSH1 |
SSH2 |
OpenSSH |
Option |
Meaning |
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-2 |
Use SSH-2 protocol only |
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-4 |
Use IPv4 addresses only |
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-6 |
Use IPv6 addresses only |
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-8 |
No effect; simply passed along to rsh on fallback;
signifies 8-bit clean connection |
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-a |
Disable agent forwarding |
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+a |
Enable agent forwarding |
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-A |
Enable agent forwarding |
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-c cipher |
Select encryption cipher |
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-C |
Enable compression |
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-C |
Disable compression |
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+C |
Enable compression |
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|
-d level |
Enable debug messages |
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|
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-d "module=level" |
Enable debug messages per module |
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|
|
-e character |
Set escape character (^ = Ctrl key) |
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-f |
Fork into background |
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|
-F filename |
Use other configuration file |
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-g |
Gateway locally forwarded ports |
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-h |
Print help message |
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-i filename |
Select identity file |
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-k |
Disable Kerberos ticket forwarding |
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|
|
-l username |
Remote username |
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|
|
-L port1:host2: port2 |
Local port forwarding |
|
N |
|
-m algorithm |
Select MAC algorithm |
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|
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-n |
Redirect stdin from /dev/null |
|
|
2 |
-N |
Execute no remote command |
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|
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-o "keyword value" |
Set configuration keyword |
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|
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-p port |
Select TCP port number |
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-P |
Use nonprivileged port |
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-q |
Quiet mode |
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-R port1:host2: port2 |
Remote port forwarding |
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-s subsystem |
Invoke remote subsystem |
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-S |
No session channel |
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-t |
Allocate tty |
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|
2 |
-T |
Don't allocate tty |
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-v |
Verbose mode |
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-V |
Print version number |
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-x |
Disable X forwarding |
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|
+x |
Enable X forwarding |
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|
-X |
Enable X forwarding |