rsh fails ...

Alexvader · 12-10-2009, 10:39 AM

Hi,

no need to kill in.rshd in this case, right...?

BRGDS

Alex

tux_dude · 12-10-2009, 10:45 AM

If you already have is.rshd installed then no need for the netkit. Is in.rshd running? Post the output of these commands:

Code:

ps -ef | grep rshd | grep -v grep

Code:

ls -l /usr/sbin/*rsh*

As an added check (hope you have the locate db updated)

Code:

locate rshd

Code:

grep rshd /etc/inetd.conf | grep -v '#'

Alexvader · 12-10-2009, 11:00 AM

Hi Tux_Dude,

I'm not with my Slackware lappy right now... I am at the library of RIKEN right now using a W^%>S box...

I am googling for a solution for this problem, in google and in LinuxQuestions...

I have downloaded netkit, as well as netkit-kernel and netkit-filesystem (huge package btw... ) from SlackBuilds org.

I have downloaded these slackbuilds, as well as I have saved lots of google pages about "-nolisten TCP", "XDMCP", "hosts.allow", "xhost cannot connect to x server"... etc... all that may be vaguely related to the problem I have... to my usb stick...

As soon as I get back to my Slackware box, I will do as you told...

Crossing my fingers already...

Will have more news in a few hours...

Thanks a lot for teaching me the "esoteric" character of enabling some services in Slackware..

BRGDS

Alex

tux_dude · 12-10-2009, 11:07 AM

Only "netkit-rsh" is required and only if you do not already have rshd installed. Do not install the others. Take it one step at a time so we can following along with what you are doing. Best not to install anything new until you provide the output of the commands above.

Alexvader · 12-10-2009, 11:13 AM

...Will be back in 4 hrs...

, and post the output of these commands...

c ya in a while...

BRGDS

Alex

kjhambrick · 12-10-2009, 11:49 AM

Quote:

Originally Posted by Alexvader

well...

didn-t do much.... :-(

Here i am again...

... <SNIP> ...

I will now rm -rf ~/.ssh and

run as user... :

ssh-keygen -t rsa
press enter at all queries to allow for passwordless ssh login, and

cat ~/.ssh/id_rsa.pub > ~/.ssh/authorized_keys

then run as user ...

... <SNIP> ...

Alex

Alex --

What are the permissions on ~/.ssh/authorized_keys ?

Code:

ls -la ~/.ssh/authorized_keys

ssh won't accept your ~/.ssh/authorized_keys file unless the permissions are 600

Code:

chmod 600 ~/.ssh/authorized_keys

-- kjh

Alexvader · 12-11-2009, 09:04 AM

Hi @Tux_Dude,@kjhambrick

Sorry for being late... Don't know what happened to the wireless access point, no PC seems to be able to connect...

Anyway... here I am... ran the checks... the results are :

bash-3.1# ps -ef | grep rshd | grep -v grep
bash-3.1# ls -l /usr/sbin/*rsh*
-rwxr-xr-x 1 root root 15880 2008-09-23 23:52 /usr/sbin/in.rshd
-rwxr-xr-x 1 root root 8248 2008-11-27 10:06 /usr/sbin/ownership
-rwxr-xr-x 1 root root 68576 2009-06-26 20:59 /usr/sbin/smrsh
bash-3.1# locate rshd
locate : fatal error: could not find user database /var/lib/slocate/slocate.db : no such file or directory
bash-3.1# grep rshd /etc/inetd.conf | grep -v '#'
bash-3.1#

So... guess in.rshd is there allright...
what must i do now...?

So far I have not touched anything, neither /etc/kde/kdm/kdmrc, nor /etc/ssh/ssh_config nor /etc/ssh/sshd_config, nor ~/.rhosts, nor have I generated ssh keypairs...

system is "AS INSTALLED", Only thing I have done is build Code-Aster into /opt/aster/*

What is next step...?

BRGDS

Alex

tux_dude · 12-11-2009, 09:35 AM

rsh is there but it's not running.
Edit your hosts.allow and .rhosts files. Then run

Code:

/usr/sbin/in.rshd &

Check if rshd is running

Code:

ps -ef | grep rshd | grep -v grep

Then try connecting

Code:

rsh -n -l alex iskandhar.site echo hello

Alexvader · 12-11-2009, 10:08 AM

Hi Tux_Dude,

So, I have changed my /etc/hosts.allow to
rshd : iskandhar.site alex

my .rhosts to

iskandhar.site alex

bash-3.1# /usr/sbin/in.rshd &
[1] 3837
bash-3.1# ps -ef | grep rshd | grep -v grep
[1]+ Exit 1 /usr/sbin/in.rshd
bash-3.1# rsh -n -l alex iskandhar.site echo hello

.... and stops there, shell hangs and says
iskandhar.site: connection refused

... :-(

I am in runlevel 3, is this an issue...?

BRGDS

Alex

tux_dude · 12-11-2009, 10:20 AM

Quote:

Originally Posted by Alexvader

rshd : iskandhar.site alex

Remove alex from the above line. You only need to specify the domain not the user.

Quote:

Originally Posted by Alexvader

my .rhosts to

iskandhar.site alex

Add localhost to the .rhosts file.

Quote:

Originally Posted by Alexvader

bash-3.1# /usr/sbin/in.rshd &
[1] 3837
bash-3.1# ps -ef | grep rshd | grep -v grep
[1]+ Exit 1 /usr/sbin/in.rshd

in.rshd died here. Run /usr/sbin/in.rshd again without '&'. Make sure you run it as root user.

Alexvader · 12-11-2009, 10:30 AM

Hi Again

So...
my hosts.allow is now

rshd: iskandhar.site

my .rhosts is now

iskandhar.site alex
localhost alex

bash-3.1# /usr/sbin/in.rshd
bash-3.1#
bash-3.1# ps -ef | grep rshd | grep -v grep
bash-3.1# rsh -n -l alex iskandhar.site echo hello
iskandhar.site: connection refused

........................

must this be rebooted, or changed the runlevel...?

BRGDS

Alex

tux_dude · 12-11-2009, 11:03 AM

No reboot required. I setup rsh on my box and I was getting the same problem. Turns out in.rshd has to be started by inetd. I fixed that, but now I'm getting the error "poll: protocol failure in circuit setup". I am looking into that I will let you know.

In order to connect:
1. Edit /etc/inetd.conf by uncommenting the line with 'in.rshd -L'
2. Restart inetd "/etc/rc.d/rc.inetd restart"
3. Now try connecting. You should not be getting connection refuse anymore.

Alexvader · 12-11-2009, 11:22 AM

Hi Tux_Dude...

Will do this...

Have to go now... more ppl want to use this PC ( library PC ) I still have no dhcp offers from the wireless ap in my lappy ( nor anybody else, AFAIK... the router is cranked... )

Tomorrow, will be back w/more news and result of editing inetd.conf script...

Thnks for all yr help... :-)

If I get Code Aster working in Slackware, I'm going to Zapp Debian away from my lappy for good... ( so far, been using Slackware in a USB HDD connected to it... )

BRGDS

Alex

tux_dude · 12-11-2009, 11:50 AM

Got it working. I am really really glad I use ssh. I put all the steps together so anyone searching can find it in one spot.
Perform as root user:
1. Ensure rshd is installed. These files should be present.

Code:

/usr/sbin/in.rshd
/usr/sbin/in.rlogind
/usr/sbin/in.rexecd
/usr/bin/rcp
/usr/bin/rsh
/usr/bin/rlogin

If not, install the netkit-rsh package from the slack repo.

2. Edit /etc/inetd.conf by uncommenting the lines with 'in.rshd -L' and 'in.rlogind'

Code:

# Shell, login, exec and talk are BSD protocols
#
shell  stream  tcp     nowait  root    /usr/sbin/tcpd  in.rshd -L
login  stream  tcp     nowait  root    /usr/sbin/tcpd  in.rlogind

3. Edit /etc/hosts.equiv with the domain(s) of the remote clients which will connect with rsh.

Code:

localhost
iskandhar
iskandhar.site

4. Edit /etc/hosts.allow and add "in.rshd: <domains of clients>" (localhost for the same box)

Code:

in.rshd: localhost,iskandhar,iskandhar.site

5. Restart inetd

Code:

/etc/rc.d/rc.inetd restart

Perform as user which will be connecting with rsh
6. Edit the user's .rhosts file and add the domains with the authorized users which can connect.

Code:

localhost
iskandhar alex
iskandhar.site alex

7. Change permission of .rhosts file

Code:

chmod 600 .rhosts

8. Test local connection

Code:

rsh -l <user> localhost ls -l

Alexvader · 12-12-2009, 12:37 PM

Hi Tux_Dude

It worked Like a charm.... :-)

Thks for all your help... now the launching test performs ok...

There is only one more step to go... :

In a Finite Elements Calculation, the app ( ASTK , basically a Tcl/Tk GUI for input of Solver parameter, mesh, and output files names/paths ) calls for execution in an xterm window, and drops a script in a folder called ~/flasheur.

In a "correctly set" environment, the calculation can be launched from ASTK gui, calculation will proceed in an XTERM, till the end, when xterm dies, and result files are where you "instructed" ASTK to drop them.

I guess thet the rsh functionality is only for the solver to be able to play along with intermediate result files between /tmp/astk ( thats where they get dumped ...) and your work folder.

In my installation, ASTK does not launch an xterm, still, it dumps the calculation setup script in ~/flasheur, and if i call it within that directory, it will perform the calculation allright...rsh is enabled, so files get copied and moved around...

But not being able to have the xterm automatically called from within ASTK ( I guess this is called TCP tunelling... right..?! ) hinders the ability to let Aster perform batch calculations in an optimization loop for instance...

I guess this is where the /etc/kde/kdm/kdmrc --nolisten TCP and the ssh thing come into play....

What must I do for ASTK to be able to call an XTERM...?

( Pls not that I do this from runlevel 3/startx into fluxbox...

1) Is TCP tunelling to X already enabled in init 3 ( BTW...does init 3 ever "sees" /etc/kde/kdm/kdmrc...? ), or must I go into Init 4...?
2) Do I have to tweak some more files to enable Tcp tunelling to X... ? ( maybe this is where the ssh thing apply...)

Thanks in advance

BRGDS

Alex