Discuss June 2005

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197 participants
362 discussions

RE: X-Windows client for MS-Win2K
by Bryan J. Smith <b.j.smith＠ieee.org> 16 Jun '05

16 Jun '05

From: Mike Kercher <mike(a)CamaroSS.net> > Have you considered using VNC instead? I do this to just start an > xterm...from there I can run Mozilla or whatever. A nested X server is probably a better solution. Passing the native widgets over remote protocols is always going to be a better solution than using a dumb, pixel-by-pixel remote framebuffer. I.e., use RDP, X11, ICA, etc... when you have an option instead of pcAnywhere, VNC, etc... if you can. -- Bryan J. Smith mailto:b.j.smith@ieee.org

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turning off prelinking?
by alex＠milivojevic.org 16 Jun '05

16 Jun '05

In short, the reason considering (and still only considering) turning it off is to make tripwire usable again (security vs. performance, I guess). Is it possible to completely turn it off system-wide? Any additional steps needed on the existing system (that already have half of the binaries prelinked)? What order of performance degradation to expect? If it is minor, nobody is going to cry about it. My old RH 7.3 systems don't have prelinking, and I don't see them being any slower than FC2 and newer systems that have prelinking... ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program.

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Antw: CentOS Digest, Vol 5, Issue 15
by Arthur MEßNER 16 Jun '05

16 Jun '05

Is there a problem with the newly releases telnet packages ? [root@host root]# rpm -Uvh telnet-server-0.17-26.EL3.3.x86_64.rpm --test error: telnet-server-0.17-26.EL3.3.x86_64.rpm: MD5 digest: BAD Expected(9d785005 error: telnet-server-0.17-26.EL3.3.x86_64.rpm cannot be installed [root@host root]# The same error occures with telnet, and also in the different architectures. I tried i386 and x86_64 Directory Listing: -rwxr-xr-x 1 root root 53949 Jun 15 08:53 telnet-0.17-26.EL3.3.x86_64.rpm -rwxr-xr-x 1 root root 33751 Jun 15 08:53 telnet-server-0.17-26.EL3.3.x86_64.rpm -rwxr-xr-x 1 root root 48845 Jun 15 08:53 telnet-0.17-26.EL3.3.i386.rpm -rwxr-xr-x 1 root root 31196 Jun 15 08:53 telnet-server-0.17-26.EL3.3.i386.rpm MD5SUM: c9c915a0c0dc5062761a5eaf71b07ca3 telnet-0.17-26.EL3.3.x86_64.rpm 3675d6149364402fc1c63b850cef49da telnet-server-0.17-26.EL3.3.x86_64.rpm c45a2d212cfc8b4e58b70484e52899d6 telnet-0.17-26.EL3.3.i386.rpm a8a7817f86327c453e527941106a0ea8 telnet-server-0.17-26.EL3.3.i386.rpm I tried two different mirror, but this error Message was always the same.

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Centos 4.1 DVD ISO
by Mário Gamito 16 Jun '05

16 Jun '05

Hi, Does anyone knows of a place where one can download through HTTP (and only HTTP) the CentOS 4.1 DVD ISO ? I'm behind a firewall and have no chance of either getting it through bittorrent or FTP. Any help would be apreciated. Warm regads, Mário Gamito

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Is a new HP-dl380 dual XEON 64 bit or 32 bit
by Robin Mordasiewicz 16 Jun '05

16 Jun '05

Ho can I tell if a new xeon is 32 bit or 64 bit ? --

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Big trouble: can't start server after new kernel
by Mário Gamito 16 Jun '05

16 Jun '05

Hi, I have this file server with CentOS 4.0 Each time a new kernel comes out, i have to recompile it, becuse i need Appletalk support and the kernel doesn't have it. I've done this before many times and in other servers, and all went well. Now, in this particular server, with the new 2.6.9-11, after i've recompiled it, created the .img and edited grub, the machine doesn't start at all. It says it can't find the kernel image. I cannot even boot with older kernels. To worsten things, i have LVM, so "linux rescue" tells me there's no Linux installation in the server and leaves me with a prompt. Now, i can mount /boot because it is outside the LVM, but when i do it, i lost access to any command, even a mere ls. Tried to pre-copy vi before the /boot mount and could access /boot/grub/menu.lst Everything seems fine, the files are all in /boot ...!!! Do i need to run grub command after editing menu.lst ? Never did that. And why can't i boot from older kernels ? Now, the really nasty thing: somehow, i don't have the smallest hint, i had a 500 GB external USB disk to make the backups, and the "linux rescue" erased it :( :( :( Bogles me!!! Please help me. This one can cost me the job. Loosing 300 GB of files from ~ 100 users on the file server is unforgiven. Any help would be apreciated. Warm Regards, Mário Gamito

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CentOS 4.1
by alex＠milivojevic.org 16 Jun '05

16 Jun '05

Question about differences in RHEL 4.1 and CentOS 4.1 organization. Does CentOS follows same organization as RHEL? I don't see separate directory for 4.1 on Red Hat's ftp server (well, the public part of it, with SRPM packages), seems like all the updates were simply dumped into the 4.0 updates area, so basically doing normal system upgrade will bump all RHEL 4.0 systems to 4.1. On the other hand, on CentOS site, there is a separate directory for 4.1, with distinct set of packages for 4.1 that are not present in 4.0 update area. So basically, one would need to manually point yum to 4.1 directory tree to fully update system with latest bug fixes. Is this difference in approach intentional? Or the acutal update process (for those with RHEL subscriptions) is actually like the one for CentOS? How do you determine what packages were "regular" updates, and which packages were part of U1? ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program.

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Re: Burning CDs
by Bryan J. Smith <b.j.smith＠ieee.org> 16 Jun '05

16 Jun '05

From: centos(a)911networks.com > Hi, > I have just installed 4.1 on a new Dell Latitude d610. It does > not automount the CDs. When I mount the CD manually I get: > $mount /media/cdrecorder > mount: block device /dev/hdc is write-protected, mounting read-only First off, there is a multitude of understanding that is required. Most consumers are not aware of many differences between CD-R v. CD-RW access, CD-R v. CD-RW filesystems, etc... In Windows, some of this is hidden from you to a point, but not all. E.g., you use a program to "record" whereas you directly access the drive letter to to "read/write." Windows only lets you "record" to CD-R (or CD-RW emulating CD-R), and won't "read/write" to anything but CD-RW (with a non-ISO9660 fs). These two processes are actually _different_. What type of CD did you insert? A CD-RW? CD-R? Or CD-ROM? Also note that CDs are not "formatted read/write" with ISO9660. ISO9660 is a linear, byte-by-byte track, that is not modifyable (most specifically, data is a "Yellow Book" track of ISO9660). You have to use _another_ filesystem to have "read/write." UDF is its replacement, although almost any filesystem can be used. As I said, a multitude of understanding. > The CD writer is an Philips IDE: CDRW/DVD-ROM CDD5263 There is some "read/write" support for CD-RW in kernel 2.6. I haven't messed with it personally. Otherwise, you pre-master an .iso file with "mkisofs," and then you record with "cdrecord." There are GUI tools build around those 2 programs to help you. That's for CD-R (or CD-RW emulating CD-R). > Here is my mtab: > $ cat /etc/mtab > /dev/mapper/VolGroup00-LogVol00 / ext3 rw 0 0 > none /proc proc rw 0 0 > none /sys sysfs rw 0 0 > none /dev/pts devpts rw,gid=5,mode=620 0 0 > usbfs /proc/bus/usb usbfs rw 0 0 > /dev/sda1 /boot ext3 rw 0 0 > none /dev/shm tmpfs rw 0 0 > none /proc/sys/fs/binfmt_misc binfmt_misc rw 0 0 > /dev/hdc /media/cdrecorder iso9660 ro,nosuid,nodev,user=froggy 0 0 > How do I change /dev/hdc /media/cdrecorder iso9660 ro to rw? You can't. You can't really "read/write" anything that is ISO9660. It is clear that this CD media (CD-RW?) was written as ISO9660. All you can do is append additional sessions/tracks (if CD-R), or re-format it (if CD-RW). These are just things that some Windows tools "hide" from you. But you still probably need to know about them. > $ cat /etc/fstab > # This file is edited by fstab-sync - see 'man fstab-sync' for details > /dev/VolGroup00/LogVol00 / ext3 defaults 1 1 > LABEL=/boot /boot ext3 defaults 1 2 > none /dev/pts devpts gid=5,mode=620 0 0 > none /dev/shm tmpfs defaults 0 0 > none /proc proc defaults 0 0 > none /sys sysfs defaults 0 0 > /dev/VolGroup00/LogVol01 swap swap defaults 0 0 > /dev/hdc /media/cdrecorder auto pamconsole,exec,noauto,managed 0 0 Stick in a new CD-RW media that has been formatted UDF and see what happens. -- Bryan J. Smith mailto:b.j.smith@ieee.org

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Sound card under CentOS 4
by Harper, Patrick 15 Jun '05

15 Jun '05

I am swapping my laptop over to CentOS and for some reason alsa swapped my headphone jack and speakers designations during the install. I got it so that my sounds work but was wondering how to swap them back so they are defined/labeled right and why it might have done it in the first place Thanks for your help ----------------------------------------- Disclaimer: This electronic message, including any attachments, is confidential and intended solely for use of the intended recipient(s). This message may contain information that is privileged or otherwise protected from disclosure by applicable law. Any unauthorized disclosure, dissemination, use or reproduction is strictly prohibited. If you have received this message in error, please delete it and notify the sender immediately.

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Re: New Server Recommendation -- Hot-Swap SATA enclosure ...
by Bryan J. Smith <b.j.smith＠ieee.org> 15 Jun '05

15 Jun '05

[ Yes, SP^M'n the list with follow-ups to myself ;-] From: Bryan J. Smith > If you are building a new system with such storage requirements, > I would really push you towards a 3Ware Escalade 8006-2 or 8506-4. When cost is supreme, then just a Escalade 7006-2 or 8006-2 with (2) [P]ATA or [S]ATA drives is what you want. It only adds ~$125 to system cost. When you want to minimize cost, but also minimize troubles, I recommend an Escalade 8506-4LP with an EN-8721A02 (Beige) or EN-8721B02 (Black) 5.25" x 3U (3xHH) internal enclosure. SATA was explicitly designed for hot-swap with fixed, SCA-like, staggered, fixed-position connectors with _no_ extra interconnect (i.e., like SCA SCSI drives, SATA drives _should_ connect _directly_ to the backplane, and the "can" is just a frame/handle), so _avoid_ doing such with [P]ATA which is only asking for issues. The EN-8721x02 will only set you back $150, so it's well worth it (especially when you're already spending $300 for the Escalade 8506-4LP, it's only 50% more). It's also nice to have an "extra can" for either holding a spare, or mounting a replacement without having to take one of the existing drives out before it is replaced. Enlight EN-8721: http://us.enlightcorp.com/products/server/detel.php?serial=42 Enlight EN-8721_SATA (x02) Guide: http://us.enlightcorp.com/products/server/pdf_files/EN-8721_SATA.pdf -- Bryan J. Smith mailto:b.j.smith@ieee.org

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Discuss June 2005