Discuss May 2009

discuss@lists.centos.org

254 participants
254 discussions

Re: [CentOS] Postfix: user unknown
by nate 14 May '09

14 May '09

Manuel Monteiro wrote: > > > Dear all, > > > > I have a mail server based on a CentOS 5.3 machine with postfix. > > > > Most of our users are on LDAP (on localhost) but we also have some local > users and we are using PAM for authentication. Are you running nscd on the server? That should smooth out LDAP blips, though I would disable nscd's dns caching in /etc/nscd.conf Is postfix configured to talk directly to LDAP ? What does the configuration look like? nate

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Dual-booting CentOS and WinXP
by Sorin Srbu 14 May '09

14 May '09

Hi all, You know how I asked about procedures to build a dual-boot system with CentOS and WinXP a while ago? Well, I I've begun with a test machine. What I had from start was a working CentOS 5.3 32b system. What I did was to just add another empty drive configured as slave and then boot from the Windows install cd. The most curious thing happened now, I get a blank screen after the Windows installer screen saying something about "Setting up install procedure..." just at the beginning. That is to say, this happens only if the hd with CentOS is connected to power. If I disconnect the power connector to the CentOS drive, the Windows installer happily goes on. Is this to be expected, that Windows won't install if it sees a hd with another OS as master? Thanks for any hints. -- BW, Sorin ----------------------------------------------------------- # Sorin Srbu [Sysadmin, Systems Engineer] # Dept of Medicinal Chemistry, Phone: +46 (0)18-4714482 >3 signals> GSM # Div of Org Pharm Chem, Mobile: +46 (0)701-718023 # Box 574, Uppsala University, Fax: +46 (0)18-4714482 # SE-751 23 Uppsala, Sweden Visit: BMC, Husargatan 3, D5:512b # Web: http://www.orgfarm.uu.se ----------------------------------------------------------- # () ASCII ribbon campaign - Against html E-mail # /\ # # MotD follows: # This label is not a significant source of information.

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if no NFS server clients are waiting..
by Michael Casey 14 May '09

14 May '09

What can I do, If the NFS server is rebooting/offline? I mean the clients just wait and wait and wait... I tried to set timeo=5,retrans=2 mount options when mounting nfs in fstab on client side = still no luck, clients are just waiting... Can I set a timeout somewhere? :D Thank you for any tips

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Re: [CentOS] File compare word by word
by Brent L. Bates 14 May '09

14 May '09

Find the `spiff' utility. It will compare files word by word and highlight ONLY the word differences. One can also compare numbers and change the resolution of the comparison. This lets the text "1.0" equally compare to "0.1e+1" or even "0.99999", if the fudge factor is large enough in the second case. -- Brent L. Bates (UNIX Sys. Admin.) M.S. 912 Phone:(757) 865-1400, x204 NASA Langley Research Center FAX:(757) 865-8177 Hampton, Virginia 23681-0001 Email: B.L.BATES(a)larc.nasa.gov http://www.vigyan.com/~blbates/

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5.3 and XFS
by Joseph L. Casale 14 May '09

14 May '09

Looking at https://bugzilla.redhat.com/show_bug.cgi?id=469401 has me a bit unsure about the kmod for 5.3's kernel, is not expected to appear? Thanks! jlc

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Postfix: user unknown
by Manuel Monteiro 14 May '09

14 May '09

Dear all, I have a mail server based on a CentOS 5.3 machine with postfix. Most of our users are on LDAP (on localhost) but we also have some local users and we are using PAM for authentication. Sometimes emails are not delivered to an user (happens either with users on LDAP or local users on shadow) with error "unknown user" (sometimes the error comes from smtpd and sometimes from procmail when writing to an users' folder): ----- Apr 23 16:00:37 mail postfix/smtpd[6707]: D62A676856C: reject: RCPT from unknown[116.23.241.165]: 550 5.1.1 <xxxxx(a)astro.up.pt>: Recipient address rejected: User unknown in local recipient table; from=<DianncartePickens(a)sunshinemillions.com> to=< xxxxx(a)astro.up.pt > proto=SMTP helo=<b826affb8c4a402> ----- May 4 05:53:08 mail postfix/local[13781]: E33F776882D: to=<xxxxx(a)astro.up.pt>, relay=local, delay=0.03, delays=0.01/0/0/0.02, dsn=5.1.1, status=bounced (user unknown. Command output: procmail: Unknown user "xxxxx" ) ----- It seems that sometimes the system (postfix? procmail? ???) can't retrieve user information. Any ideas on what might be causing this? Thanks! Cheers, Manuel Monteiro

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Remote Desktop on CentOS 5.3
by Alfred von Campe 14 May '09

14 May '09

Does anyone have remote desktop connectivity working in CentOS 5.3? I'm using the Gnome desktop and have configured the Remote Deskop Preferences to "Allow other users to view your desktop" and "Allow other users to control your desktop". The configuration dialog box says that "Users can view your desktop using this command: vncviewer HOSTNAME.domain.com:0". However, when I try to connect to it from another host, I always get a "Connection reset by peer" error message. I've tried various different clients an operation systems, and I get the same result. I disabled the firewall completely for this test (service iptables stop) so I know it's not a firewall issue. Then again, I don't see a vncserver process running either, so that may be the issue. This was working on CentOS 5.2. What do I need to do to access my existing desktop on my CentOS 5.3 system remotely? I don't need to use VNC, but I do want to access the existing session and not a separate desktop (i.e., by starting a vncserver process). Thanks, Alfred

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File compare word by word
by MHR 13 May '09

13 May '09

Is there a utility that compares files word by word, instead of whole lines or single bytes? I found that I can simulate this by replacing all the spaces in a file with linefeeds, then 'diff -B' the results, but that's kind of awkward and hard to read when differences that matter come up. (For the record, I tried using OOo's document comparer, converting to text and using diff, and a few others, but none of them worked. I used to think that running text files through fmt would help, but fmt is strangely inconsistent as to where it breaks lines, even when the content within a line or two is identical.) Thanks. mhr

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Re: [CentOS] CentOS 5.3 installation on HP DL380 R05 server
by Nguyen Hai Chau 13 May '09

13 May '09

Thanks to Joseph and Nate for helpful answers. A stupid question: I do not receive your mails although already subsribed to this list. I read your answers on mail archive. I set up my account to receive email from list but it seems not work. Chau

2 1

Calendar server
by Bowie Bailey 13 May '09

13 May '09

I recently switched to using Thunderbird for my email and installed the Lightning calendar add-on. Now all I need is a remote calendar server. I just need a simple server to support a few personal calendars and a shared calendar. Any recommendations for a CentOS / Apache based calendar server? -- Bowie

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Discuss May 2009