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openscad available?
by Mark LaPierre 21 Jan '13

21 Jan '13

Does anyone know if there is a repo that has openscad for CentOS? rpmfind.net doesn't turn up anything. The openscad wiki page says, "As of 2013, prebuilt OpenSCAD packages are available on many recent Linux and BSD distributions, including Debian, Ubuntu, Fedora, Arch, and NetBSD. Check your system's package manager for details." I though that maybe CentOS might have one too. I'll try building it from source if not, but I've seldom had success with that course of action. Most times the build fails for missing dependencies which just are not available for CentOS, or it fails to find them even when they are installed. -- _ °v° /(_)\ ^ ^ Mark LaPierre Registerd Linux user No #267004 https://linuxcounter.net/ ****

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anyone else noticed webalizer (or dns throughput in general) to be a lot slower lately?
by Joe Pruett 21 Jan '13

21 Jan '13

my nightly webalizer runs have gone from about 2 hours to over 8 hours. this change happened sometime after november. webalizer hasn't changed in years, but bind was updated in january, so i am thinking that is the likely culprit. has anyone else noticed a similar slowdown? i am going to dig through my logs to see if i can spot the day that things slowed down.

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heads up on silent change in recent samba3x update
by Joe Pruett 21 Jan '13

21 Jan '13

i guess that upstream doesn't consider the samba3x packages should be treated the same way as other packages, but i just wanted to warn folks that the recent samba3x update changed a default setting. if you rely on hostnames in a hosts allow/deny clause (and possibly elsewhere), things won't work until you set 'hostname lookups=yes'. given that it jumped from 3.5 to 3.6, there may be other changes as well.

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Custom locale, LC_TYPE and urxvt
by James B. Byrne 21 Jan '13

21 Jan '13

I have a custom locale in use on our system. Consequently, Xlib does not recognize the default environment setting for LC_TYPE. To get an urxvt window opened without encountering the locale error message I am therefore constrained to use some variant of the following: LC_TYPE=en_US.UTF-8 urxvt& I would like to set LC_TYPE to a different value than LANG. However, based on experiment it seems that the only locale setting in /etc/sysconfig/i18n that CentOS-6.3 responds to is LANG. I have looked at /etc/profile.d/lang.sh but my knowledge of terminal settings and system variables is insufficient to make much sense out of it. if [ -n "$LANG" ]; then saved_lang="$LANG" [ -f "$HOME/.i18n" ] && . "$HOME/.i18n" && sourced=1 LANG="$saved_lang" unset saved_lang else for langfile in /etc/sysconfig/i18n "$HOME/.i18n" ; do [ -f $langfile ] && . $langfile && sourced=1 done fi If I am not entirely mistaken, this code checks to see if $LANG is set and saves it. Presumably this is to preserve $LANG from being overridden by the contents of ~/.i18n but it does not even seem to check /etc/sysconfig/i18n in that case. One might infer from this treatment that this is because lang.sh expects that if $LANG is set then /etc/sysconfig/i18n has already been processed. Assuming that /etc/sysconfig/i18n is found then it processes the following statement: if [ "$sourced" = 1 ]; then [ -n "$LANG" ] && export LANG || unset LANG . . . [ -n "$LC_CTYPE" ] && export LC_CTYPE || unset LC_CTYPE . . . Checking in ~/.bashrc I see this: . . . # Source global definitions if [ -f /etc/bashrc ]; then . /etc/bashrc fi And checking /etc/bashrc I see this: . . . # Only display echos from profile.d scripts if we are no login shell # and interactive - otherwise just process them to set envvars for i in /etc/profile.d/*.sh; do if [ -r "$i" ]; then if [ "$PS1" ]; then . "$i" else . "$i" >/dev/null 2>&1 fi fi done unset i unset pathmunge fi However, when I look for the mate to that final 'fi' I find this: . . . if ! shopt -q login_shell ; then # We're not a login shell # Need to redefine pathmunge, it get's undefined at the end of /etc/profile pathmunge () . . . Evidently /etc/profile.d/lang.sh only gets processed by /etc/bashrc if I am NOT in a login shell. The question then is: when does /etc/profile.d/lang.sh get processed? Well, numerous places it seems: /etc/csh.login /etc/profile /etc/rc.d/init.d/rpcbind /etc/rc.d/rc3.d/K95firstboot /etc/rc.d/rc /etc/X11/xinit/xinitrc-common Yet, despite all these calls to /etc/profile.d/lang.sh, whenever I open a new session in gnome-terminal LC_LANG is never set but $LANG is. If However, I do . /etc/profile.d/lang.sh in that window session, then LC_TYPE becomes set as I desire. Either something is setting LANG and ignoring LC_TYPE in /etc/sysconfig/i18n before lang.sh or something is unsetting everything other than $LANG after lang.sh is processed. What is going on? -- *** E-Mail is NOT a SECURE channel *** James B. Byrne mailto:ByrneJB@Harte-Lyne.ca Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3C3

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Serial console
by Tracy Reed 21 Jan '13

21 Jan '13

I am trying to get a CentOS 6.3 serial console to work with IPMI SOL. I think I have everything working but maybe the wrong baud rate on the getty: $ ipmitool -I lanplus -U root -H 10.0.0.14 sol activate Password: [SOL Session operational. Use ~? for help] �� 10.0.0.14 is the DRAC IP address of the CentOS 6.3 box. It accepts the password and connects me to the console but then when I type I get those funny characters. Somehow an agetty is already being run: root 46110 1 0 16:13 ttyS1 00:00:00 /sbin/agetty /dev/ttyS1 19200 vt100-nav Is udev starting this up for me somehow? It says 19200 when everything I have read says it should be 115200. How do I change this? Some docs say I should create my own /etc/init/serial-ttyS1.conf containing: # For IPMI serial console # ttyS1 - agetty # # This service maintains a agetty on ttyS1. stop on runlevel [S016] start on runlevel [23] respawn exec agetty -h -L -w /dev/ttyS1 115200 vt102 but when I do that I end up with two gettys, presumably fighting over the serial port, and the original is apparently holding onto it because I still can't connect and get a login prompt. # ps -ef |grep agetty root 46110 1 0 16:13 ttyS1 00:00:00 /sbin/agetty /dev/ttyS1 19200 vt100-nav root 46118 1 0 16:13 ? 00:00:00 agetty -h -L -w /dev/ttyS1 115200 vt102 What is the right way to set this up? Thanks! -- Tracy Reed

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Subject:centos installation error
by Shalini Saini 21 Jan '13

21 Jan '13

Hello team, I have installed centos 6.3 version from bootable pan drive.but showing kernal panic error.Pls suggest me. -- Thanks and regards Shalini 8800142207

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Re: [CentOS] evaluating backup systems: rsync
by Nicolas Thierry-Mieg 21 Jan '13

21 Jan '13

Reindl Harald wrote: > > > Am 19.01.2013 19:28, schrieb Nicolas Thierry-Mieg: >>>> no I don't think you will, since the file modification times won't have >>>> changed. >>> >>> and even if the did - who cares? >>> >>> * rsync does not transfer unchanged data ever >>> * rsync will sync the times to them from the sources >>> * so have nearly zero network traffic >> >> Not true: if you change the modification time on a file, by default >> rsync will copy the whole file again. >> >> See man rsync: >> Rsync finds files that need to be transferred using a “quick check” >> algorithm (by default) that looks for files that have changed in size or >> in last-modified time. >> >> and yes I've tested this before posting ;-) >> to avoid this you need to use --size-only > > bullshit > > yes it transfers - but with rsync algorithm > RTFM how rsync works - it will generate checksums on both > sides, tnrafser only the checksums and come to the conclusion > that the data are ident > > i am using rsync since many years for all sort of backups > and file transfers and even my thunderbird-profiles over > WAN is copied with a "virtual speed" of 200 Megabytes per second > ________________________________ > > [harry@srv-rhsoft:~]$ ls /mnt/data/profiles/thunderbird/harry/global-messages-db.sqlite > -rw-r----- 1 harry verwaltung 640M 2013-01-19 19:31 /mnt/data/profiles/thunderbird/harry/global-messages-db.sqlite > > this file will ALWAYS be changed, not only modification times > but that does not change the facht 99.8% of the file is unchanged > and rsync by design transfers only the changes over the wire > > since i am doing this DAILY between home and office machine > you do not need to explain me how rsync works and in which cases > in trafsers data - really you do not need > > i sync some TB of data daily inclduing GB large logfiles > where is also only the new part transferred all the time > woosh! chill out dude... again, read the man page. This is not true if source and dest are local: then the rsync algo is not used, and if the mod time is changed on the source the whole file will be copied. so if you're rsyncing locally, eg to a usb drive, you need --size-only as I said. Now if one of the source or dest is remote I agree with you, but this is not alwayss the case. I don't recall whether the OP expressed whether that was the case or not, though I think he mentioned wanting to backup family pictures, so it might very well be to a usb HD. Inany case I definitely know you mentioned testing things locally. Which I did, and you didn't... being wrong is ok, but you should really work on that attitude of yours.

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Sluggish server with big array
by Guy Boisvert 20 Jan '13

20 Jan '13

Hi! I am experiencing strange behavior with my new CentOS 6.3 installation (system up to date). I have a big 11 TB EXT4 array mounted on /home/data. The server is a Tyan 2U (TA26-B3992-E) with Dual Opteron 2216, one cpu has 4 Gigs RAM and the other has 8 Gigs (so 12 Gigs total). The server uses 8 x Seagate 2TB SAS hard disks (7200 RPM) and all the disks are grouped together to form 1 x 500 Gigs RAID 6 array (for CentOS) and 1 x 11 TB RAID 6 for data storage (mounted on /home/data). The controller is a LSI SAS 9265-8i: [root@radium ~]# lspci 00:01.0 PCI bridge: Broadcom BCM5785 [HT1000] PCI/PCI-X Bridge 00:02.0 Host bridge: Broadcom BCM5785 [HT1000] Legacy South Bridge 00:02.1 IDE interface: Broadcom BCM5785 [HT1000] IDE 00:02.2 ISA bridge: Broadcom BCM5785 [HT1000] LPC 00:03.0 USB controller: Broadcom BCM5785 [HT1000] USB (rev 01) 00:03.1 USB controller: Broadcom BCM5785 [HT1000] USB (rev 01) 00:03.2 USB controller: Broadcom BCM5785 [HT1000] USB (rev 01) 00:04.0 Ethernet controller: Intel Corporation 82557/8/9/0/1 Ethernet Pro 100 (rev 10) 00:06.0 PCI bridge: Broadcom BCM5780 [HT2000] PCI-X bridge (rev b0) 00:07.0 PCI bridge: Broadcom BCM5780 [HT2000] PCI-X bridge (rev b0) 00:08.0 PCI bridge: Broadcom BCM5780 [HT2000] PCI-Express Bridge (rev b0) 00:09.0 PCI bridge: Broadcom BCM5780 [HT2000] PCI-Express Bridge (rev b0) 00:0a.0 PCI bridge: Broadcom BCM5780 [HT2000] PCI-Express Bridge (rev b0) 00:0b.0 PCI bridge: Broadcom BCM5780 [HT2000] PCI-Express Bridge (rev b0) 00:0c.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI ES1000 (rev 02) 00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration 00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map 00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller 00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control 00:19.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration 00:19.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map 00:19.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller 00:19.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control 01:0d.0 PCI bridge: Broadcom BCM5785 [HT1000] PCI/PCI-X Bridge (rev c0) 04:04.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5780 Gigabit Ethernet (rev 10) 04:04.1 Ethernet controller: Broadcom Corporation NetXtreme BCM5780 Gigabit Ethernet (rev 10) 05:00.0 RAID bus controller: LSI Logic / Symbios Logic MegaRAID SAS 2208 [Thunderbolt] (rev 01) I have KVM/QEMU running 3 VMs: 2 stored in the 500 gigs array and one on the 11 TB array. I have a couple of samba shares from the 11 TB array (all of them are on the 11TB array). The strange behavior is that if i "ls -al /home/data", i have to wait 7-8 seconds to see the output. If i do a simple ls, output is instantaneous. I see about the same delay when i access the samba shares from the server (related ?). I don't know where to start with this! Here are other informations: [root@radium data]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_radium-lv_root 50G 7.4G 40G 16% / tmpfs 5.9G 88K 5.9G 1% /dev/shm /dev/sda1 485M 92M 368M 21% /boot /dev/mapper/vg_radium-lv_home 437G 4.9G 410G 2% /home /dev/mapper/vg_radium2-lv_data 11T 6.1T 3.7T 63% /home/data [root@radium data]# uname -a Linux radium 2.6.32-279.19.1.el6.x86_64 #1 SMP Wed Dec 19 07:05:20 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux [root@radium data]# rpm -qa |grep samba samba-winbind-clients-3.5.10-125.el6.x86_64 samba-3.5.10-125.el6.x86_64 samba-client-3.5.10-125.el6.x86_64 samba-winbind-3.5.10-125.el6.x86_64 samba-common-3.5.10-125.el6.x86_64 [root@radium data]# pvdisplay --- Physical volume --- PV Name /dev/sdb VG Name vg_radium2 PV Size 10.42 TiB / not usable 4.12 MiB Allocatable yes (but full) PE Size 4.00 MiB Total PE 2732799 Free PE 0 Allocated PE 2732799 PV UUID vTDqS3-wVLz-ZZfu-yfKi-dE6k-rYwr-NVMPcA --- Physical volume --- PV Name /dev/sda2 VG Name vg_radium PV Size 499.51 GiB / not usable 2.00 MiB Allocatable yes (but full) PE Size 4.00 MiB Total PE 127874 Free PE 0 Allocated PE 127874 PV UUID alKttt-X0HC-WT4X-ieju-VHqa-YcvU-gHR6Px [root@radium ~]# lvdisplay --- Logical volume --- LV Path /dev/vg_radium2/lv_data LV Name lv_data VG Name vg_radium2 LV UUID pDGfTc-qD3t-p5c3-FDHH-z0HS-pUKq-dClZwM LV Write Access read/write LV Creation host, time radium.canal.qc.ca, 2012-11-28 15:52:17 -0500 LV Status available # open 1 LV Size 10.42 TiB Current LE 2732799 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:2 --- Logical volume --- LV Path /dev/vg_radium/lv_root LV Name lv_root VG Name vg_radium LV UUID Lp5Mkd-Ht2J-XBfF-Yafx-w1HY-nIlN-1771T3 LV Write Access read/write LV Creation host, time radium.canal.qc.ca, 2012-11-28 13:57:36 -0500 LV Status available # open 1 LV Size 50.00 GiB Current LE 12800 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:0 --- Logical volume --- LV Path /dev/vg_radium/lv_home LV Name lv_home VG Name vg_radium LV UUID VCvRSg-x1On-9GgR-09we-yIx6-uMvi-dYO2UZ LV Write Access read/write LV Creation host, time radium.canal.qc.ca, 2012-11-28 13:57:40 -0500 LV Status available # open 1 LV Size 443.59 GiB Current LE 113560 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:3 --- Logical volume --- LV Path /dev/vg_radium/lv_swap LV Name lv_swap VG Name vg_radium LV UUID GZorIv-iovS-n2S2-JkSe-bDUl-kwhk-E6potz LV Write Access read/write LV Creation host, time radium.canal.qc.ca, 2012-11-28 13:58:01 -0500 LV Status available # open 1 LV Size 5.91 GiB Current LE 1514 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:1 I did directly over lvm: mkfs.ext4 /dev/vg_radium2/lv_data [root@radium ~]# parted GNU Parted 2.1 Using /dev/sda Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) select /dev/sdb Using /dev/sdb (parted) print Error: /dev/sdb: unrecognised disk label /etc/fstab ========= /dev/mapper/vg_radium-lv_root / ext4 defaults,acl 1 1 UUID=2169688f-e830-458d-b31e-25aa0dc9c753 /boot ext4 defaults 1 2 /dev/mapper/vg_radium-lv_home /home ext4 defaults 1 2 /dev/mapper/vg_radium-lv_swap swap swap defaults 0 0 tmpfs /dev/shm tmpfs defaults 0 0 devpts /dev/pts devpts gid=5,mode=620 0 0 sysfs /sys sysfs defaults 0 0 proc /proc proc defaults 0 0 /dev/mapper/vg_radium2-lv_data /home/data ext4 defaults,acl,noatime 0 3 Sorry for the long post! Guy Boisvert IngTegration inc. http://www.ingtegration.com

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Re: [CentOS] evaluating backup systems: rsync
by Nicolas Thierry-Mieg 20 Jan '13

20 Jan '13

Reindl Harald wrote: > > > Am 19.01.2013 15:46, schrieb Nicolas Thierry-Mieg: >> M. Fioretti wrote: >>> On Fri, Jan 18, 2013 08:07:40 AM -0500, SilverTip257 wrote: >>>> if you really want to eliminate that data being transferred, I >>>> suppose you could do the extra work and rename the directory at the >>>> same time on the source and destination. Not ideal in the least. >>> >>> Not ideal indeed, but I'll probably do it that way next time that some >>> renaming like this happens on very large folders. I assume that after >>> that, I'd also have to launch rsync with the options that says to not >>> consider modification time. >> >> no I don't think you will, since the file modification times won't have >> changed. > > and even if the did - who cares? > > * rsync does not transfer unchanged data ever > * rsync will sync the times to them from the sources > * so have nearly zero network traffic Not true: if you change the modification time on a file, by default rsync will copy the whole file again. See man rsync: Rsync finds files that need to be transferred using a “quick check” algorithm (by default) that looks for files that have changed in size or in last-modified time. and yes I've tested this before posting ;-) to avoid this you need to use --size-only .

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Large yum update
by E.B. 19 Jan '13

19 Jan '13

Hi, On about 8am GMT Jan 18, my server reported an unusually large number of yum updates available. I think this is due to the release of CentOS 5.9: http://article.gmane.org/gmane.linux.centos.announce/7203 However, I just wanted to be a little paranoid, since this is unusual for my normal yum update reports (over 100 updates compared to a couple a week). Can someone confirm my suspicion, or is it possible I have a security issue on my hands? Thank you!!!!

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