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• connect two computers together via a rs232 serial port

  - by Richard

  Wondering if anyone knows of a solution to connect with telnet/ssh through a rs232 serial port Edit: I am looking for a way to connect to computers together via a serial port. I want to be able to view the file system of a computer through a serial port.. Is this possible? Edit: So I have successfully connected two computers together using r232 serial ports with a null modem. The instructions I have used are located here Now how do I get to the file system of the host computer?? Any ideas?

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• Changing linksys router configuration from command-line

  - by Dan

  I am constantly logged into (ssh'd) my home machine (ubuntu) from various remote locations. Sometimes I would like to change my home linksys router settings (change the port forwarding settings or disable/enable wireless, things like that). When I try and use the links2 text browser, there isn't much I can do because the tab titles don't show up (presumably because they are pictures?). Is there another way of configuring a linksys router from a command line? I guess my only other option is to set up a proxy on my home machine and use a browser connected to that proxy to configure it, but I would think there might be a non-browser way of doing it. Thanks

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• install SSH2 (server?) on FreeBSD

  - by Robert Cabri

  At work we have freeBSD testmachine. And we have a PHP script that uses SSH2 protocol to connect with the freeBSD server. With this script I'm not able to connect to the freeBSD server. I wanted to install it, but I'm not sure where to find the right source to compile. The connection can be made with a different machine, but isntalling a new distro isn't the solution right now. I can connect to the server over ssh, but not with the ssh2 protocol in PHP (http://nl.php.net/ssh2).

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• Can't connect using Jail SFTP account

  - by Fazal

  I've been following this tutorial "Limiting Access with SFTP Jails on Debian and Ubuntu" and whilst I've had no errors setting it up, I've had issues on Ubuntu 10.04LTS logging in as a user on a virtualhost. I've changed my SSH port to 22022, and enter all the credentials when attempting to login. I ran these commands to add a user to the virtualhost: # useradd -d /srv/www/[domain] [username] # passwd [username] # usermod -G filetransfer [username] # chown [username]:[username] /srv/www/[domain]/public_html I should add that this is the only time I've setup the user they have no other /home directories or such. The directory that does exist is at /srv/www/example.com/public_html When I try using a desktop package such as cyberduck to login to the site, I keep getting a "Login failed with this username or password". I am completely lost as what to do next... The reason why I'm trying this method is because I want my clients to use SFTP and not FTP to upload files to their websites. Any help or direction is appreciated.

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• failing to achive tunneling to fresh ubuntu 10.04 server

  - by user65297

  I've just set up a new 10.04 server and can't get the tunneling to work. local machine > ssh -L 9090:localhost:9090 [email protected] login success, but thereafter trying tunnel from local browser, http://127.0.0.1:9090 echo at server terminal: channel 3: open failed: connect failed: Connection refused auth.log sshd[24502]: error: connect_to localhost port 9090: failed. iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination Trying 9090 at server (links http://xx.xxx.xx.xx:9090 works) sshd_config is identical to previous 8.04 server, working fine. What's going on? Thankful for any input. Regards, //t

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• How to select text in Pico when I don't have a carat character?

  - by Andrew Swift

  I am using Pico via Terminal/SSH on an iPad with a French bluetooth keyboard. There is no way to type the carat (^) key to select text (control-carat to start selection). The carat on the keyboard is used to type a circonflex accent (août), and only becomes active when one types a letter after pressing it. There is therefore no way to type control-^. When I do type ctrl-^ in Pico, the cursor moves to the previous line. Is there an alternate way to select text in Pico? I can't see how to use it without finding a solution.

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• Is there a command line two-factor authentication verification code generator?

  - by dan

  I manage a server with two-factor authentication. I have to use the Google Authenticator iPhone app to get the 6-digit verification code to enter after entering the normal server password. The setup is described here: http://www.mnxsolutions.com/security/two-factor-ssh-with-google-authenticator.html I would like a way to get the verification code using just my laptop and not from my iphone. There must be a way to seed a command line app that generates these verification codes and gives you the code for the current 30-second window. Is there a program that can do this?

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• What happens to running processes when I lose a remote connection to a *nix box?

  - by David Marble

  I occasionally lose my remote SSH connection to my VPS. I use screen for long-running processes, but am wondering what happens to the processes I had running aside from those run within a screen session if I lose the connection to the box. When I re-establish a connection to the box, what happened to the bash and sshd processes that were running when I lost the connection? Today I lost connection repeatedly and noticed many more bash and sshd processes than usual. If there are processes hanging around, do I need to kill them? How could I determine which processes were abandoned from my previous session? Thanks for any replies!

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• Weird behaviour/rendering of backspace in Terminal.app when SSHing into zsh

  - by Nils Riedemann

  Hi there, I just stumbled upon a weird problem. When I SSH into my server (centos, zsh) and I type some stuff and hit backspace It looks like a space - but internally it really deleted the characters. ls -l a Note that the space between land a is actually when I hit backspace. When I now hit return ls -a gets executed. This is only in zsh, in bash it works fine. Hope anyone has an idea what this is all about and how to fix this.

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• X11 forwarding - have window showing on two computers.

  - by Tim

  I currently have 2 desks: one with a mac, the other with a 2 Linux computers on. One of those Linux computers is constantly on, so I would run the chat app on that (pidgin, most likely). I can run pidgin on Mac by sshing into the Linux computer with "ssh -X", i.e. X11 forwarding. However, I want to have the chat windows viewable on both computers simultaneously (or at the very least, by entering a command or whatever). Is this possible and if so, how? (Also: I know that it'd be possible via VNC or whatever, but yuck - X11 on mac is bad enough.) Thanks, Tim

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• Sftp via shell - how it is possible

  - by Tomasz Zielinski

  (Moved from StackOverflow: http://stackoverflow.com/questions/4589725/sftp-via-shell-how-it-is-possible) How is it possible for tools like http://mysecureshell.sourceforge.net/ to provide SFTP access by merely specifying them as shell by typing: usermod -s /bin/MySecureShell myuser ? I'm on Debian Lenny, with default sshd/OpenSSH. Is this e.g. a feature of SSH protocol that allows user shell to handle sftp commands? I can't wrap my head around this because usually OpenSSH needs sftp-server module (or the internal one in newer versions) - and this makes me think that sftp commands don't even hit the shell and are handled earlier or by different code path..

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• Can I nohup/screen an already-started process?

  - by ojrac

  I'm doing some test-runs of long-running data migration scripts, over SSH. Let's say I start running a script around 4 PM; now, 6 PM rolls around, and I'm cursing myself for not doing this all in screen. Is there any way to "retroactively" nohup a process, or do I need to leave my computer online all night? If it's not possible to attach screen to/nohup a process I've already started, then why? Something to do with how parent/child proceses interact? (I won't accept a "no" answer that doesn't at least address the question of 'why' -- sorry ;) )

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• X Session from Mac

  - by tekknolagi

  How can I log into an X server from Mac OS X? I know that ssh -X username@host will log me in and I will have the capability to run X applications. On Cygwin/X you can log in and have a whole X session from your computer... and it will look something like this: How can I replicate this? Using this batch script: @echo off SET DISPLAY=127.0.0.1:0.0 SET REMOTE_HOST=%1 IF "%REMOTE_HOST%" == "" SET REMOTE_HOST=10.0.0.1 SET CYGWIN_ROOT=\cygwin SET RUN=%CYGWIN_ROOT%\bin\run -p /usr/bin SET PATH=.;%CYGWIN_ROOT%\bin;%PATH% SET XAPPLRESDIR= SET XCMSDB= SET XKEYSYMDB= SET XNLSPATH= if not exist %CYGWIN_ROOT%\tmp\.X11-unix\X0 goto CLEANUP-FINISH attrib -s %CYGWIN_ROOT%\tmp\.X11-unix\X0 del %CYGWIN_ROOT%\tmp\.X11-unix\X0 :CLEANUP-FINISH if exist %CYGWIN_ROOT%\tmp\.X11-unix rmdir %CYGWIN_ROOT%\tmp\.X11-unix if "%OS%" == "Windows_NT" goto OS_NT echo startxdmcp.bat - Starting on Windows 95/98/Me goto STARTUP :OS_NT REM Windows NT/2000/XP echo startxdmcp.bat - Starting on Windows NT/2000/XP :STARTUP %RUN% XWin -query tekknolagi.dyndns.org -clipboard -lesspointer -scrollbars -screen 0 1050x1655@2 -screen 1 1680x985@1

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• How do I configure pfsense as an outbound VPN client?

  - by Avery Chan

  We use pfsense as a router/firewall. Because we're based in China, it is useful for us to have VPN access for all our internal clients. Instead of each individual client connecting to a VPN server stateside, I'd like to configure pfsense as a VPN client and have all the network traffic be routed through it. Most of the posts I've seen regarding pfsense and VPN are concerning connecting to the LAN from outside; this is not what I want to do. Another option would be for an SSH tunnel to be initiated on the pfsense box with the LAN traffic routed through it. How do I configure pfsense to be able to do either of these? One huge caveat is that OpenVPN cannot be used. The solution I am looking for needs to use one of the other VPN protocols.

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• Private key authentication with pam_ldap

  - by Gareth

  I'd like to set up pam_ldap on some of our servers so that we can centrally manage who has access to which server, and easily revoke access if e.g. someone leaves the company. I've done some research and got this working. Hooray! However I'd also like to be able to use public-private key logins - i.e. allow users to store their public keys in the LDAP directory and have these work for logins too. I can't find any documentation about being able to do this, but I also can't find any reasons that it shouldn't be possible. Is there a way to do it, or is there some fundamental reason that it won't work?

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• Sftp via shell - how is it possible?

  - by Tomasz Zielinski

  (Moved from StackOverflow: http://stackoverflow.com/questions/4589725/sftp-via-shell-how-it-is-possible) How is it possible for tools like http://mysecureshell.sourceforge.net/ to provide SFTP access by merely specifying them as shell by typing: usermod -s /bin/MySecureShell myuser ? I'm on Debian Lenny, with default sshd/OpenSSH. Is this e.g. a feature of SSH protocol that allows user shell to handle sftp commands? I can't wrap my head around this because usually OpenSSH needs sftp-server module (or the internal one in newer versions) - and this makes me think that sftp commands don't even hit the shell and are handled earlier or by different code path..

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• Is there an Alternative to TextMate's mate and rmate for Windows?

  - by TiernanO

  As part of the upcoming TextMate 2 release, there will be a new feature called rmate, which will allow you to edit files from a remote machine (Linux/Unix/OSX) via SSH using your local copy of TextMate... Is there something similar for Windows? I know i could use CyberDuck, find the file i want to edit, download locally, work on it and then re-upload, but rmate looks like you just type rmate on the remote server, and text mate pops up with the file. (i have not tried since i am not a TextMate owner) Is there something similar for Windows?

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• Debugging Connection Issues Between Two Linux Servers

  - by clickfault

  I have two CentOS 5 servers running iptables and apf. I am having issues connecting with ssh from server 1 to server 2. I can connect from server 1 to a third server and from that third server to both 1 and 2. In all cases I am using the IP address and not a host name. I have stopped iptables and apf on all servers and it doesn't seem to change anything. What is the best way to debug this process?

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• Serverlocation moved and how can I Move the files

  - by Bernhard

  Hello together, I´ve a big problem. I have to move data from an old Webspace which is only accessibla by ftp. No we have a new root server which is accessible by ssh of course :-) No i Need to move all data from the old space but there is a lot of Gb of files. Is there a way to fetch all files directly from the old ftp to the storage and not over a third station (my local machine)? I´ve tried it with ftp but without success. I think I´ve used the wrong commands. Is there a way to etablish something like this including all files and directorys? Thank you in advance Bernhard

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• Transfer many Gigabytes between two servers

  - by Bernhard

  Hello, I have a big problem. I have to move data from an old Webspace which is only accessibla by ftp. The new root server is accessible by ssh of course :-) I need to move all the data from the old space but the amount is just huge. Is there a way to move all the files directly from the old ftp to the storage and not over a third station (my local machine)? I´ve tried it with ftp but it didn't work. I think I´ve used the wrong commands. Is there a way to do this? Thank you in advance Bernhard

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• Change permission of files with the owner 'apache'

  - by Dotty

  Hay, i have some files on my server with the owner set to "apache", I'm not quite sure how this happened. Anyway, i need to change the permission of these files to 0777 so i can download/edit them. However i cannot. I'm using a 1and1 Linux server and use Plesk to administrate it. I have the ability to login via SSH. However, if i run chmod or chown i get a "permission denied" error, and if i try to sudo chmod or chown it says the command cannot be found. When i go to edit my domain details, i get this option Shell access to server with FTP user's credentials and have these options /bin/sh /bin/bash /sbin/nologin /bin/bash (chrooted) /bin/rbash Any idea's how i should go about changing the permissions or changing the owner? Thanks

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• Getting molly-guard to work with sudo

  - by 0xC0000022L

  The program molly-guard is a brilliant little tool which will prompt you for a piece of information before you reboot or shut down a system. Usually it asks for the hostname. So when you work a lot via SSH, you won't end up taking down the wrong server, just because you were in the wrong tab or window. Now, this works all fine when you say reboot on the command line while you are already root. However, it won't work if you do sudo reboot (i.e. it won't even ask). How can I get it to work with sudo as well? System: Raspbian (latest, including updates), package molly-guard version 0.4.5-1.

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• Why does VNC eat certain characters?

  - by TK Kocheran

  I often use VNC to connect to my desktop upstairs using a laptop downstairs over my home network. I tunnel the VNC connection via SSH. The problem I keep running into is that I'll attempt to type a ! or a : or even a captial A and it will come across the wire as a 1, ;, or a respectively. Is this something I can fix? It's really REALLY annoying while one is programming to have to pop open character map and find a colon and copy/paste it in each time. Running Ubuntu 10.04 upstairs, Linux Mint 10 downstairs.

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• rsync does't work

  - by jspooner

  I set up a new ec2 ubuntu server and I'm unable to use rsync to push a file up. I can ssh to the machine with my keypair. I'm not sure why this looks like it works but finishes in half a second and there is nothing in /home/ubuntu on the server. ? ~ rsync -av -i ~/.ec2/my-keypair ~/Downloads/pushcom.2012-06-26T01-10-04.gz [email protected] building file list ... done >f..t.... gsg-keypair >f..t.... pushwoodcom.2012-06-26T01-10-04.gz sent 3624 bytes received 64 bytes 7376.00 bytes/sec total size is 3392 speedup is 0.92 I've tried 50 different ways of the rsync command but I can't get anything to work. Please help! Thanks

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• How to access remotly to a mysql server?

  - by ÉricP

  Hi, I'm trying to access my remote mysql server from my own computer. I uncommented: bind-address = 80.10.65.45 I added 80.10.65.45 as a server in privilege root 80.10.65.45 yes ALL PRIVILEGES yes I'm using Sequel Pro on MacosX to connect via SSH here is the debug log: debug1: Authentication succeeded (password). debug1: Local connections to LOCALHOST:58517 forwarded to remote address 127.0.0.1:3306 debug1: Local forwarding listening on ::1 port 58517. debug1: channel 0: new [port listener] debug1: Local forwarding listening on 127.0.0.1 port 58517. debug1: channel 1: new [port listener] debug1: Entering interactive session. debug1: Connection to port 58517 forwarding to 127.0.0.1 port 3306 requested. debug1: channel 2: new [direct-tcpip] channel 2: open failed: connect failed: Connection refused debug1: channel 2: free: direct-tcpip: listening port 58517 for 127.0.0.1 port 3306, connect from 127.0.0.1 port 58519, nchannels 3

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