Linux-Noob Forums - Remote Access

backup/restore remotely

Thu, 13 Oct 2011 13:54:03 +0200

I'm looking for some different ways to backup/restore files from a remote server that I incase I mess up something really bad.

I'll be able to restore instead of having to do a full reinstall. I'll check google later.

Remote SSH Commands

Mon, 25 Oct 2010 21:35:54 +0200

I am trying to remotely call a script file via ssh.

the server has a shell that is a custom program, lets call it shelly. There is also a script file on the server that needs to run when in shelly.

i can run the following after i ssh into the box, as root.

Code:
exec /usr/local/bin/shelly < /my_folder/custom_script

that works fine.

I need to be able to embed this in ssh. I have done so like this. I have shared keys so no password needed, and it works.

Code:
ssh user@server "exec /usr/local/bin/shelly < /my_folder/custom_script"

when i run this ssh command from my remote machine the commands are not executed from the script. So i run ssh in debug mode, and after a successful authentication i get a line that says:

Code:
Ssh2channelSession/SSHCHSESSION.C : bad data

and the connection begins to quit/close.

I don't understand what "Bad Data" error means, and i do not have this SSHCHSESSION.C file on my server.

Is Bad Data mean there is something wrong with the command? or is it a permissions problem on the server?

Any Ideas?

XDMCP - black screen with KDM on Fedora 12

Thu, 25 Feb 2010 06:58:54 +0100

I've setup XDMCP on my fedora 12 laptop.

It uses KDM.

/etc/kde/kdm/kdmrc

[Xdmcp]

Enable=true

Willing=/etc/X11/xdm/Xwilling

Xaccess=/etc/X11/xdm/Xaccess

[security]

AllowRemoteRoot=true

DisallowTCP=false

/etc/kde/kdm/Xaccess (link to the xdm 'xaccess' file) includes:

* CHOOSER BROADCAST

In KDM settings I set it to 'no theme' and 'no custom background' so it's totally plain.

iptables & SELinux are both off. The client & server

are both on the same switch.

I can connect successfully. But all I get is a black screen & an X cursor, never get to see the login prompt. I have no idea why.

Any suggestions?

Synchronizing Any Two Machines Using rsync

Tue, 21 Apr 2009 09:05:00 +0200

The rsync utility is a mandatory tool for your command-line work, and you need to learn how to use it for easy, safe, quick laptop-desktop synchronization. This article introduces rsync and mentions several related tools, all of which provide easy synchronization procedures.

Quote:What is rsync?

The rsync utility is a file-transfer and synchronization program widely available for Linux

HELP on FreeNX for Fedora Core 6

Thu, 05 Feb 2009 15:38:25 +0100

Hey everyone, First of all i am a total noob especially when it comes to Linux. So be patient.

I had the FreeNX installed on the linux box and i was able to remote desktop from a windows machine. UNTIL one day i needed to map a network drive on the windows machine from the Linux box (which ofcourse i didnt do myself) so the person that did that told me he had to turn off a couple of things among iptables.

Here is what i did from there on:

1. uninstalled all nx software on the Linux machine.

2. reinstalled NX using the yum command thing.

3. installed NoMachine NX free edition for Linux from ----> http://www.nomachine.com/download-packag...rod_Id=540

4. messed around with the iptables in an effort to try to open port 22 (which i have no idea whether its open or closed)

The problem:

when i try to connect to the linux box from windows client i get the following message

"The NX service is not available or the NX access was disabled on host xxx.xxx.xxxx"

In the detail section:

NX> 203 NXSSH running with pid: 5128

NX> 285 Enabling check on switch command

NX> 285 Enabling skip of SSH config files

NX> 285 Setting the preferred NX options

NX> 200 Connected to address: 9.26.156.235 on port: 22

NX> 202 Authenticating user: nx

NX> 208 Using auth method: publickey

NX> 204 Authentication failed.

I really need some help on this and if its not too much i would like to fix this problem without affecting the network drive mapped on the windows machine.

A real noob need help on FreeNX

Fri, 18 Apr 2008 08:58:02 +0200

I am a newbie in linux and I am trying to use freenx to remote access my FC6 box (in LAN) in work place from my home windows box. My questions are:

1.To install free on linux, all I need to do is "yum install freenx"? Nothing else and not even downloading the package?

2.I cannot do port forwarding on the router in my work place, what can I do and what to fill in in the "Host" field in the NX client? I know both ext. and int. IP of the fedora box.

3.I did a "yum update", and it says "clearing bah bah bah/removing bah bah bah". After it is finished, it seems many things are removed, I can't even see the things in my panel.

I rebooted it, and it seems to be fine. I did "yum install freenx" again and it says "nothing to do".

I would like to ask is there is any data/program lose due to the "yum update"?

Thank you very much for any help. bow*

no remote after reboot

Fri, 14 Dec 2007 09:29:20 +0100

I'm trying to setup a Fedora 8 pc to run as a headless server (5 clients max) more of a project than anything. Problem is, when I reboot the computer it wont let me ssh or xdmcp into the pc until I physically goto the computer and login locally once, then everything works fine. Really quite confused here. Ports open of note are: tcp 22, tcp/udp 177,16001, 6000-6015, 35091. I guess my question is whats preventing me from connecting? Is there a default refuse all connections on boot and to bypass it I have to log in to load up my own configuration?

[img]<___base_url___>/uploads/emoticons/default_ph34r.png[/img]

Cisco VPN

Sun, 10 Jun 2007 13:19:15 +0200

Well, I now have inet connection from school, but I can't get it to work under Ubuntu. To get access to inet I need to use a Cisco VPN dialer, but I just can't get it to work.

I have put a copy of the file here, so if anybody can help me here, I would be really thank full.

Windows php interface with linux box

Fri, 08 Jun 2007 08:10:47 +0200

Hi,

I want to built a windows php website---> connect to the linux box--->read all settings value from the .ini files->display it into the php website->user can then change the values->save the .ini file base on the user modification close the file-->for back up reason of settings, also save the values into SQL database.

Anyone knows how to approach this problem? What do I need?

Thanks

FreeNX on Fedora Core 6 - Noob Problem

Fri, 11 May 2007 20:18:02 +0200

Hi all,

Yes I'm a noob when it comes to Linux so be gentle!! lol

I've recently had a box setup running Fedora Core 6 and would like to access it with NX-Client for Windows.

I've been onto the box using putty and run: yum install nxserver

I'm not sure if everything went well or not, it asked me "Is this ok" 3 times and eventually finished.

On windows I installed the NX-Client v1.5 and entered all the server details.

Initially I was getting "Cannot start local X server" or similar, but with setting compatibility thats been resolved.

Now I'm getting:

"Session Startup Failed"

And the log file this reports is attached to teh bottom of this post!!

I've entered the key from etc/nxserver/client.id_dsa.key into the client but looking through the log its something to do with session ID's or something?!?!

Any help is MUCH appreciated!!

Thanks

Error Log:

NX> 203 NXSSH running with pid: 2596

NX> 285 Enabling check on switch command

NX> 285 Enabling skip of SSH config files

NX> 200 Connected to address: 217.172.xxx.xxx on port: 22

NX> 202 Authenticating user: nx

NX> 208 Using auth method: publickey

HELLO NXSERVER - Version 1.5.0-50 OS (GPL)

NX> 105 hello NXCLIENT - Version 1.5.0

NX> 134 Accepted protocol: 1.5.0

NX> 105 SET SHELL_MODE SHELL

NX> 105 SET AUTH_MODE PASSWORD

NX> 105 login

NX> 101 User: root

NX> 102 Password:

NX> 103 Welcome to: VS-1300 user: root

NX> 105 listsession --user="root" --status="suspended,running" --geometry="1280x1024x32+render" --type="unix-gnome"

NX> 127 Sessions list of user 'root' for reconnect:

Display Type Session ID Options Depth Screen Status Session Name

------- ---------------- -------------------------------- -------- ----- -------------- ----------- ------------------------------

NX> 148 Server capacity: not reached for user: root

NX> 105 startsession --session="Seedbox" --type="unix-gnome" --cache="8M" --images="32M" --link="adsl" --kbtype="pc102/gb" --nodelay="1" --encryption="1" --backingstore="never" --geometry="1280x994" --media="0" --agent_server="" --agent_user="" agent_password="******"" --screeninfo="1280x994x32+render"

NX> 1000 NXNODE - Version 1.5.0-50 OS (GPL)

NX> 700 Session id: VS-1300-1000-0E5E20346A4B3643A510F1657BD2544E

NX> 705 Session display: 1000

NX> 703 Session type: unix-gnome

NX> 701 Proxy cookie: eb61959875d95bcb20b0dfd529c30c20

NX> 702 Proxy IP: 127.0.0.1

NX> 706 Agent cookie: eb61959875d95bcb20b0dfd529c30c20

NX> 704 Session cache: unix-gnome

NX> 707 SSL tunneling: 1

NX> 1009 Session status: starting

NX> 710 Session status: running

NX> 1002 Commit

NX> 105 /usr/bin/nxserver: line 1077: 12369 Terminated sleep $AGENT_STARTUP_TIMEOUT

NX> 1006 Session status: running

NX> 596 Session startup failed.

NX> 1004 Error: NX Agent exited with exit status 1.

Can't open /var/lib/nxserver/db/running/sessionId{0E5E20346A4B3643A510F1657BD2544E}: No such file or directory.

mv: cannot stat `/var/lib/nxserver/db/running/sessionId{0E5E20346A4B3643A510F1657BD2544E}': No such file or directory

NX> 1006 Session status: closed

NX> 1001 Bye.

bye

Killed by signal 15.

how i got rsync working as a daemon on port 873

Sun, 11 Mar 2007 19:06:27 +0100

install rsync (ie. on debian use apt-get install rsync) on the host machine and client machine

HOST MACHINE

cp /usr/share/doc/rsync/examples/rsyncd.conf /etc/rsyncd.conf

edit /etc/rsyncd.conf to your requirements

the only bit i changed was the path of the folder i wanted to rsync.

edit /etc/default/rsync and change

RSYNC_ENABLE=false to RSYNC_ENABLE=true

/etc/init.d/rsync start

do a netstat -l and you should now see that rsync is listening on port 873

CLIENT MACHINE

to activate rsync

rsync -av host::ftp /client/rsync'd/folder

ftp is the name of the default module in /etc/rsyncd.conf you can change this to anything you want in the config or add new modules for different folders to rsync. you might get error messages if you try and rsync a folder what shares different file systems.

how do I scp a file

Tue, 27 Feb 2007 14:52:21 +0100

first of all what is scp ?

here's a quote direct from the top of the command

Code:
man scp

Quote:SCP(1) BSD General Commands Manual SCP(1)

NAME

scp - secure copy (remote file copy program)

SYNOPSIS

scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]

[-l limit] [-o ssh_option] [-P port] [-S program]

[[user@]host1:]file1 [...] [[user@]host2:]file2

it's the same as cp (copy) except secure as you are doing it over an ssh connection. When you start an scp session to a target box, you will be prompted for the users ssh password, this is normal and signifys to you that this is a secure transfer.

here's the usage

Code:
scp -prP port file user@ip:./

where port=the ssh listening port on the target linux box

where file=the file you want to send to the target

where user=the username you ssh in as

where ip=the ip address of the target box

where :./=the home directory of the user you are ssh'ing as

and

-p =Preserves modification times, access times, and modes from the original file.

-P=capital P for port as -p is already taken from above.

-r=recursively copy entire directories.

so a real example of the above would be like

Quote:[anyweb@localhost ~]$ scp -prP 1234 SC_160_P_ESD1.zip anyweb@213.64.12.34:./anyweb@213.64.12.34's password:

SC_160_P_ESD1.zip 100% 29MB 255.2KB/s 01:58

thanks to P38 and jY for the advice.

cheers

anyweb

About Remote installation

Tue, 16 Jan 2007 17:47:34 +0100

Hi folks,

OS: Slackware or CentOS

I'm prepared to build an experimental server which includes Apache, PHP, MySQL, Proxy, Sendmail, Firewall, Webmail, etc. No graphic will be run on the server. In order to facilitate searching Internet for advice a workstation shall be connected via router to remote install the packages. The IP for the server will be 192.168.0.10 and for the workstation 192.168.0.11. Basic installation will be made by running the DVD installer download from respective website. Additional to the packages for running the server what other packages are needed for remote installation and for accessing the server to configure all relevant services. Please advise. TIA

B.R

satimis

Fedora 6 VNC server woes

Thu, 11 Jan 2007 03:52:18 +0100

If anybody can help me with this situation:

I recently downloaded fedora core 6 and installed and did full updates to the system.

I usually use ultravnc via windows xp but when i tried to configure the default vnc that comes with fedora 6

i couldnt get it to work. In the terminal i tyoe in vncserver and it prompts me for a password twice. after confirmation i try

to connect to the linuz box via xp but i get only a terminal window upon conerction. I would like to see the Monitor screen

however i see realy basic terminal prompt

this the first time Using Linux i already looked in the forum topic,ut none of the posts helped me.

I triewd installing tightvnc and realvnc but neither would install due to a dependency error, missing xfree86.

Please help me set this up so i can remotel login to my linux box.

Key-Based SSH Logins With PuTTY

Mon, 11 Dec 2006 07:20:17 +0100

[/url][url=http://www.howtoforge.com/ssh_key_based_logins_putty]http://www.howtoforge.com/ssh_key_based_logins_putty

interesting arcticle covering key-based ssh logins with putty

cheers

anyweb