change root password

[fastjack]

Hi there,
I can access the RP with root and password root over SSH. That's great of course.
But from a security point of view I would like to change the password. How should one do that?
I have tried with passwd and succeeded. However, after a reboot the password is root again. So how can I store the changed password?
Thanks a lot
Fastjack

[toffline]

Hi and also a happy new year 2016,

I had no problems to change the root password.

See here:

Code: Select all

login as: root
Server refused our key
root@***'s password:
##############################################################################
# Red Pitaya GNU/Linux Ecosystem
# Version: 0.94
# Branch: master
# Build: 558
# Commit: 2c11e5ef7cddfa305033253e2381c2571699c90f
##############################################################################
Last login: Sat Jan  2 10:46:40 2016 from ***
redpitaya> ls -al /etc/shadow
-rw-r----- 1 root shadow 801 Jan  2 10:42 /etc/shadow
redpitaya> passwd
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
redpitaya> ls -al /etc/shadow
-rw-r----- 1 root shadow 801 Jan  2 11:22 /etc/shadow
redpitaya> reboot



login as: root
Server refused our key
root@***'s password:
##############################################################################
# Red Pitaya GNU/Linux Ecosystem
# Version: 0.94
# Branch: master
# Build: 558
# Commit: 2c11e5ef7cddfa305033253e2381c2571699c90f
##############################################################################
Last login: Sat Jan  2 11:22:10 2016 from ***
redpitaya> ls -al /etc/shadow
-rw-r----- 1 root shadow 801 Jan  2 11:22 /etc/shadow
redpitaya>

So please try again.

Bye
Christian

[Onnosr]

Christian is right.

I changed the password successfully.
Thanks.

Onno

[Nils Roos]

The issue is probably with the buildroot-based components (which was all that's available prior to 0.94). In the Debian scenario, changing the root password obviously works, as attested by previous posts.

With the buildroot environment that uses a ramdisk as primary filesystem, it's just not possible to persistently change the password in the running system. The only option is to set a different (non-changeable) password during the ecosystem build.

[fastjack]

Hi and thank you all for the replies.
I realise that I am not using the normal image as Nils already suggested, but I am using the image for the SDR tranceiver, which you can find here:
http://pavel-demin.github.io/red-pitaya ... ver-hpsdr/

So, my only optoin here is to fully rebuild the image with a new password embedded?