Discuss September 2011

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268 participants
253 discussions

Files being modified in /bin/
by Micky L Martin 26 Sep '11

26 Sep '11

For the binary experts. I have a situation here. Something hideously but continuously is modifying the /bin/ executables as common as coreutils and net-tools. I can verify that from md5sum. First thing I checked was 'ls' and it has a checksum mismatch. So I removed it and reinstalled it. Then I moved the file somewhere else to cross bisect it. I did a hexdump on original ls file and the modified file, and there was some 700 lines of hex code additional in the modified file. Then I set a cron to check and do md5sum on all system files and after half an hour, I go a report back. Files modified. This time when checked the hex dump of newly and earlier modified files, they were the same. Exact same! Because rpm and rpmverify also seemed to have been modified so I cannot trust 'rpm -V' package verification. Already did lsof and process tracing but to no avail. Does anyone have any idea how to find that culprit? -Micky.

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Firewalling outbound connections...
by John Doe 26 Sep '11

26 Sep '11

Hi, would anyone know a soft to firewall outbound connections (applications phoning home, etc...). It would detect an unknown (to him) app that tries to connect to the outside world and it would popup a allow/deny request...AppArmor might be a bit overkill... Anyone have any experience with Systrace, TuxGuardian or Zorp GPL...? Thx, JD

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External Dial-up Modem
by Graham Johnston 26 Sep '11

26 Sep '11

I am having an issue with Centos 6 and an external USRobotics modem. We use the modem as part of a last resort SMS paging system. Across multiple Dell servers, different models, I can't not get the modem to respond to simple AT commands while using Minicom. At the same time if I connect the server to a console port on a switch I can successfully access the switches serial console. So I know the serial port itself is working. The modem still works fine if connected to a Centos 5 server. Any thoughts? Graham Johnston Network Planner Westman Communications Group 204.717.2829 johnstong(a)westmancom.com <mailto:johnstong@westmancom.com> P think green; don't print this email.

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this is strange and dark
by fakessh 26 Sep '11

26 Sep '11

hello admin This is strange and dark: it receives more than one hundred updates and deposits are still not updated are welcome ... -- http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x092164A7 gpg --keyserver pgp.mit.edu --recv-key 092164A7 http://urlshort.eu fakessh @

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This doesn't make sense
by Thomas Dukes 26 Sep '11

26 Sep '11

Just got my Lenovo TS130 with a Xeon E3-1225 Processor, 4GB RAM, blah, blah, blah...... It won't boot CentOS 6.0 64 bit, Scientific Linux 64 bit 6.1, but will boot 32 bit CentOS 6.0. Any ideas? Otherwise, its going back to Amazon Monday and I'm done. Will keep my 5.7 Centos boxes until they rot! TIA

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Not receiving root mail
by Anne Wilson 26 Sep '11

26 Sep '11

Although I have the alias defined in /etc/aliases and /etc/postfix/aliases, I'm not receiving root mail. Following the previous thread about unreceived logwatch mail, I tested with a manual run of logwatch, and found that my ISP is rejecting the mail because it is seeing an envelope carrying my local address. My suspicion is that the mail is going out via sendmail instead of postfix-sendmail. IIRC there used to be system-switch-mail or a similarly named package. I can't find any such package - and can't remember which file it edited. Can someone please point me to that file? Anne -- New to KDE Software? - get help from http://userbase.kde.org

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SSH in and my terminal keystrokes are weird.......
by Todd 26 Sep '11

26 Sep '11

Hi All, I upgraded to OS X 10.7 on my laptop and when I try to ssh into my servers and do edits it seems my backspace is now weird. When I backspace it skips all around, inserts what looks to be special characters, etc. If I save and go back in the file edited right, but due to all the inserted garbage and skipping around of the cursor I cant tell at that time if what I did worked. I dont recall this happening on Snow Leopard at all, but we did also upgrade to CentOS 6 and I honestly have no idea where this issue would be. Can anyone provide any thoughts? Todd

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disk partitioning: 6.0 install to harddrive using liveCD
by centos＠trodman.com 26 Sep '11

26 Sep '11

Greetings: I'm planning to set up a test Centos 6.0 box (has CDROM, but no DVD) with these partions: / 10GB ( no separate mount for /usr ) /tmp 1GB /var 10GB /boot 500MB The centos mirrors I have seen do not provide the full distro on CD (this box has no DVD). I'm used to having about 6 CD isos to work with. The livecd install to hard drive works, but apparently does not support custom partitioning (correct me if I'm wrong). What do you suggest I do to get the partitioning I want? I'm leaning towards: booting into single user mode, back up /var to tar file, delete /var, create a new partion for /var and /tmp, update /etc/fstab, mount /var and /tmp, restore /var from tar backup. Is the best way? I have no investment in the current install, so I can start from scratch. -- thanks/regards, Tom

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Hello from RAQport Please remove this post
by Alex Bajan 26 Sep '11

26 Sep '11

Dear Centos, We did never receive the Server back from Australia And this forum is not to post incorrect disputes information from the users regarding some other companies. Link below http://lists.centos.org/pipermail/centos/2007-September/043643.html Sincerely Alex Lech Bajan Principal RAQport Inc. 2004 North Monroe Street Arlington Virginia 22207 703-528-0114 voice 703-652-0993 voice 2 800-695-6200 toll free sales(a)raqport.com http://raqport.com Providing solutions with Centos, Proxmox, OpenVZ, BlueQuartz, and BlueOnyx. We ship worldwide, or can provide colocation in our Arlington VA Datacenter We can migrate your old worn out Cobalt RaQ 3/4/550/Qube systems to BlueQuartz or BlueOnyx running on Proxmox VE or OpenVZ. Please let us know if you have any questions?

4 3

ssh reverse DNS failure
by Timothy Murphy 26 Sep '11

26 Sep '11

I use dyndns's (free) service to access a remote machine with a dynamic IP address. The machine is running under CentOS-6.0. I can ssh into the address given me by dyndns (*.homelinux.com), but when I do this I get the warning "reverse mapping checking getaddrinfo for" * "failed - POSSIBLE BREAK-IN ATTEMPT!" This doesn't really matter, as I normally use OpenVPN for accessing this site - the dyndns method is a safety precaution in case openvpn doesn't work. But I'm wondering if it is possible to stop the warning? I've tried various recipes google gave me, eg adding "UseDNS no" to /etc/ssh/sshd_config on the remote machine (and re-starting sshd), but none of them has worked, -- Timothy Murphy e-mail: gayleard /at/ eircom.net tel: +353-86-2336090, +353-1-2842366 s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland

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Discuss September 2011