Anybody know how to set an nvram variable from a file?

[Deleted member 27741]

I have a file that contains a value (that is all the file contains) that I want to enter into nvram. How can I do this?

It would be extra helpful if I could set it from a particular line in the file, but I don't know if that is possible.

Reason why I am doing this is I have a curl command that gets a password from a website (vpnbook) and I want to update the nvram variable vpn_client_password with that password, maybe once a day or so.

 

[ColinTaylor]

nvram set vpn_client_password="`cat /tmp/mnt/ABC/vpn-pw.txt`"

 

[ColinTaylor]

The single quotes are back quotes not forward.

` not '

This is also acceptable:

nvram set vpn_client_password="$(cat /tmp/mnt/ABC/vpn-pw.txt)"

 

[Deleted member 27741]

Yeah, it took me awhile to figure out the single quotes are on the tilde key...

```````
instead of
'''''''
Works like a charm. Thanks!

 

[ColinTaylor]

Yeah, it took me awhile to figure out the single quotes are on the tilde key...

If you have a US keyboard. On my UK keyboard it's on the key with a broken vertical bar (not the solid vertical bar) and a logical not symbol, as apposed to the apostrophe under the @ symbol. Simple.

 

[Deleted member 27741]

Yeah, who could possibly be confused?

I like the parenthesis better!

 

[ColinTaylor]

I like the parenthesis better!

Technically the `` method is depreciated and $() is now the "correct" way of doing it.

But I like the old way because I easily confuse $(blah) with ${blah}, which of course means something else.