script that use a sudo password

Turbocapitalist · 10-21-2018, 12:19 PM

Quote:

Originally Posted by drudox

ok .. but my mashine have no a static IP addr ! soi which

Code:

HostName

I have to give there ?

The machine you are connecting from does not need a static IP address itself. However, the machine you are connecting to does need some kind of permanent host name or IP number. If the target machine has a dynamically allocated IP address it will change and you can compensate by signing it up for a dynamic DNS service like No-IP.com

In the SSH client configuration file (that is to say on the machine you are connecting from) the configuration directive "Host" contains the shortcut names. The "HostName" configuration directive points to the fully qualified domain name (fqdn) or permanent IP address.

drudox · 10-21-2018, 12:35 PM

no no the machine who I try to connect from have a static IP .. and of course DNS

Turbocapitalist · 10-21-2018, 12:43 PM

Ok. But the client machine only needs an outgoing connection, it does not matter whether it is static or dynamic. However, the machine you are connecting to is another matter.

What is the situation regarding permanent IP address or fully qualified domain name for the machine you are connecting to? That is what needs to go into the HostName directive in ~/.ssh/config on the SSH client machine.

drudox · 10-21-2018, 01:15 PM

the machine who I try to connecting have a stati ip .

so basically this file on my local machine is correct ?

Code:

Host my March
        User marco
        HostName March
        IdentityFile ~/.ssh/office.ed25519.key
        IdentitiesOnly yes
        ServerAliveInterval 30
        ServerAliveCountMax 4

Turbocapitalist · 10-21-2018, 01:20 PM

The part "HostName March" has to point to the full host name of the destination machine. So replace "March" with the full address.

drudox · 10-21-2018, 01:37 PM

and .. so why in my office machine I had just insert :

Code:

Host lab 130.159.43.40
        User marco
        HostName 130.159.43.40
        IdentityFile ~/.ssh/office.ed25519.key
        IdentitiesOnly yes
        ServerAliveInterval 30
        ServerAliveCountMax 4
------------------------------------------------------------

Now why I have to put the hostname of the macghine which I'm pointing ?

basically the same file ?

Turbocapitalist · 10-21-2018, 01:43 PM

Now you can type either "ssh lab" or "ssh xxx.yyy.zz.aa" and then all the configuration settings associated with that shortcut will be added automatically.

drudox · 10-21-2018, 01:50 PM

thank you very much it works!! but in order to doing the same thing (office->lab->server) I have to ass another block in the .ssh/config ?

Turbocapitalist · 10-21-2018, 02:21 PM

Quote:

Originally Posted by drudox

thank you very much it works!!

Good work!

Quote:

Originally Posted by drudox

but in order to doing the same thing (office->lab->server) I have to ass another block in the .ssh/config ?

Yes. Check it manually first and then transfer the settings to ~/.ssh/config after the settings you've just added. Substitute the real server key name for the ->server key below:

Code:

ssh -i server.ed25519.key -o 'ProxyCommand ssh -i ~/.ssh/office.ed25519.key -W %h:%p marco@lab' marco@node_1

Then if that works:

Code:

Host lab 130.159.43.40
        User marco
        HostName 130.159.43.40
        IdentityFile ~/.ssh/office.ed25519.key
        IdentitiesOnly yes
        ServerAliveInterval 30
        ServerAliveCountMax 4

Host server
        User marco
        HostName xx.yy.zz.aa
        IdentityFile ~/.ssh/server.ed25519.key
        IdentitiesOnly yes
        ServerAliveInterval 30
        ServerAliveCountMax 4
        ProxyCommand ssh -i ~/.ssh/office.ed25519.key -W %h:%p marco@lab

Then "ssh server" ought to get you through.

You are setting the 'lab' machine as a jump host or bastion host, both names are common.

drudox · 10-21-2018, 03:23 PM

very strange .. if I give :

Code:

ssh -i server.ed25519.key -o 'ProxyCommand ssh -i ~/.ssh/office.ed25519.key -W %h:%p marco@lab' marco@node_1

inside

Code:

~/.ssh

directory .. it works fine

other wise it ask me password and so on
what I'm wrong ?

drudox · 10-21-2018, 03:38 PM

ok
now this part is done (thank you so much Turbocapitalist )... back to the topic .. how can i rub scrip in ssh without these stop when I log out ?
I was thinking to use nohup but i'm nor sure if it doesn work in thi way

scasey · 10-21-2018, 04:28 PM

Quote:

Originally Posted by drudox

very strange .. if I give :

Code:

ssh -i server.ed25519.key -o 'ProxyCommand ssh -i ~/.ssh/office.ed25519.key -W %h:%p marco@lab' marco@node_1

inside

Code:

~/.ssh

directory .. it works fine

other wise it ask me password and so on
what I'm wrong ?

Put the full path to the server key file.
When you run from another directory, ssh doesn't know where the server.ed25519.key file is.

Turbocapitalist · 10-21-2018, 10:40 PM

Ryan's Tutorials has a good tutorial on paths and navigation of the file system. It will provide the necessary background information to be able to point to the keys from anywhere.