Guralp Systems CMG-DCM build <10,000 - Manual (Page 156)

Acquisition Modules and Platinum Firmware Recording and Retrieving Data
11.3.1.3 Automating network downloads
If data are to be repeatedly downloaded from a Platinum system, it is possible
to automate the mounting and dismounting of the storage device, which
considerably simplifies the operation. This is accomplished by means of a
special user identity: the special user is configured so that the storage device
is mounted automatically when the user logs in and dismounted
automatically when the user logs out. Network file transfer protocols such as
scp, sftp and rsync all involve a hidden login so, as long as they authenticate
as the special user, they can be invoked at any time without the need for a
command-line session to handle device operations.
To create the special user, run the command Pt­storage­adduser followed
by the desired username – this command will prompt interactively for a
password for the new user. The password will not be echoed to the screen.
Note: If the system is to be connected permanently to the Internet,
it is necessary to choose a strong password. Since the password will
almost certainly be programmed into the client file transfer
software, there is no requirement for it to be memorable. GSL
recommend the use of password-generation software for this
purpose. There are a number of good, free password-generating
applications and web-sites available on the Internet.
MAN-EAM-0003 156 Issue E - February 2014