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Agilent E7495 linux root account
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Wallace Gasiewicz:
I think I am almost ready to do the 6.25 upgrade then the clock/freq hack.
I have the 6.25 files
I have putty and telnet
I have a PCMCIA card and a computer with a working PCMCIA port and windows 7
The PCMCIA card has an old 6.14 upgrade on it.
My new 7495 works fine at present with the exception of the Freq/time issue, yellow triangle, tracks satellites .
Questions:
Can I use telnet to do the upgrade? Or do I copy the old 6.4 to my computer and save it, wipe the card and add
egclient.jar and full 6.25 upgrade to the card? Then use the card in the 7495?
I do not have a Hex reader at present, any recommendations? I have Minipro programmer and have used it several times in the past to work with EPROM. Just converted 8713 to 8714, I have an extra unit if anyone is interested.
I would like to make the hack changes to the files before I upgrade the 7495, are the binary addresses the same?
Can I do that?
I know the hack will not work on my present OS because the binary addresses are not the same. I guess I could look for the lines of code though.

Any help would be appreciated, Wally
kirill_ka:

--- Quote from: Wallace Gasiewicz on March 28, 2019, 10:35:12 am ---I would like to make the hack changes to the files before I upgrade the 7495, are the binary addresses the same?
Can I do that?

--- End quote ---
Hi Wally,

Make sure the hash for the resulting binary is correct. This is a reliable way to know you did the right thing. I'm not sure if it's easy to apply the patch to the upgrade package,
but you can always telnet to E7495 and replace the binary after the upgrade.
See here for sha256 hashes: https://www.eevblog.com/forum/testgear/agilent-e7495-linux-root-account/msg1212269/#msg1212269
kirill_ka:
Does anyone know, how to disable HW options? For instance, I removed the power meter board to add a second channel to the E4418B power meter.
I hacked some "registry" files to make it boot, but the power meter option is still there. I want to remove it cleanly.
darnelld:
root login.. I just picked up this great little box to use a spec an for TRP measurements. For the life of me I can't log in as root. I looked at the securetty file (file contents below) and noticed that I according this, I am not allowed to log in as root over telnet because the ttyp0 and ttyp1 are not allowed. Any ideas how I can get around this?

Thanks!

[guest@E749xx /etc]$cat securetty
# /etc/securetty: list of terminals on which root is allowed to login.
# See securetty(5) and login(1).
#
# Include ttyp0, ttyp1, etc to allow telnet access. *NOT RECOMMENDED*
tty1
tty2
ttyS0
ttyS1
ttyS2
ttyS3
ttyS4
ttyS5
pts/0
pts/1
pts/2
pts/3
pts/4
pts/5
[guest@E749xx /etc]$
kirill_ka:
pts/? serves the same purpose as ttyp?. I think the comment about ttyp is obsolete. Have you upgraded to 6.25?
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