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dirty screen
by Jerry Geis 13 Jan '11

13 Jan '11

Is there a command that marks the screen as "dirty" and hopefully redraws it? If I do a control ALT F1 and the F7 this in effect redraws the screen. I am getting video artifacts that I think is in the nvidia driver. the switching console works - I was just hoping there is a more convenient way. some command or something. Thanks, Jerry

4 6

Re: [CentOS] ifcfg-rh: error: Unknown connection type 'Bridge'
by James B. Byrne 13 Jan '11

13 Jan '11

On: Thu, January 13, 2011 11:58, "Emmett Culley" <emmett(a)webengineer.com> wrote: > > I saw something similar and it turned out the bridge-utils > package was not installed. # rpm -qi bridge-utils Name : bridge-utils Relocations: (not relocatable) Version : 1.1 Vendor: CentOS Release : 2 Build Date: Sun 07 Jan 2007 05:48:39 PM EST Install Date: Fri 21 May 2010 03:42:52 PM EDT Build Host: builder6.centos.org Group : System Environment/Base Source RPM: bridge-utils-1.1-2.src.rpm . . . -- *** 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

1 0

IPv6, HE tunnel and ip6tables problems
by Stephen Harris 13 Jan '11

13 Jan '11

CentOS 5.5, fully patched. I have a HE tunnel (tunnelbroker.net) IPv6 tunnel. This works pretty well and is simple to setup. Everything works fine. Until I try to set up an ip6tables firewall. eg if I try to view https://dnssec.surfnet.nl/?p=464 then the page never displays and the firewall shows kernel: IN=sit1 OUT=eth0 SRC=2001:0610:0001:40cd:0145:0100:0186:0033 DST=my.machine LEN=80 TC=0 HOPLIMIT=56 FLOWLBL=0 PROTO=TCP SPT=443 DPT=40367 WINDOW=5712 RES=0x00 ACK SYN URGP=0 I also see some DNS issues kernel: IN=sit1 OUT=eth0 SRC=2001:0620:0000:0009:0000:0000:0000:1103 DST=my.machine LEN=542 TC=0 HOPLIMIT=54 FLOWLBL=0 FRAG:1232 ID:0086942f PROTO=UDP (the source address here is ns1.zurich.surf.net) I'm wondering if this is due to fragmentation, but I'm only guessing. The dnssec page refered to above indicates there may be a fragment re-assembly issue causing ip6tables problems. Now I'm a newbie to IPv6 so I might be making a mistake. This is my firewall script. #!/bin/bash IPT6="/sbin/ip6tables" PUBIF="sit1" LOCAL="eth0" echo "Starting IPv6 firewall..." $IPT6 -F $IPT6 -X $IPT6 -t mangle -F $IPT6 -t mangle -X #unlimited access to loopback $IPT6 -A INPUT -i lo -j ACCEPT $IPT6 -A OUTPUT -o lo -j ACCEPT # Defaults $IPT6 -P INPUT DROP $IPT6 -P OUTPUT ACCEPT $IPT6 -P FORWARD DROP both() { $IPT6 -A INPUT $@ $IPT6 -A FORWARD $@ } # Allow full outgoing connection but no incomming stuff both -i $LOCAL -j ACCEPT both -i $PUBIF -m state --state ESTABLISHED,RELATED -j ACCEPT # allow incoming ICMP ping pong stuff both -p ipv6-icmp -j ACCEPT # IP6 DNS both -i $PUBIF -p tcp --destination-port 53 -j ACCEPT both -i $PUBIF -p udp --destination-port 53 -j ACCEPT both -i $PUBIF -p tcp --source-port 53 -j ACCEPT both -i $PUBIF -p udp --source-port 53 -j ACCEPT # IP6 from known good machine that I want to access internal network both -i $PUBIF -p tcp --source remote.machine -j ACCEPT both -i $PUBIF -p udp --source remote.machine -j ACCEPT # log and drop everything else both -i $PUBIF -j LOG both -i $PUBIF -j DROP It might be that I need to compile a generic kernel; apparently > 2.6.20 fixes a number of ip6tables issues; CentOS 5 is based on 2.6.18. Maybe CentOS 6 (*nudge nudge*) will work :-) I'm not sure I want to leave my home network on IPv6 without a firewall; not sure I trust all the machines I have on local network to be safe from remote probes! I wonder if anyone has any suggestions... Thanks! -- rgds Stephen

4 7

Reinstall python without yum
by mattias 13 Jan '11

13 Jan '11

Are it possible? I tryed with a downloaded rpm but not working Only conflicts

3 2

thumbnail cache
by Frank Cox 13 Jan '11

13 Jan '11

This webpage tells me that you can set the thumbnail cache size using gconf-editor: http://ubuntuforums.org/showthread.php?t=1481182 However, the gconf-editor that I have on Centos 5.5 doesn't have that setting. Is it not possible to set this value with Centos 5.5? -- MELVILLE THEATRE ~ Melville Sask ~ www.melvilletheatre.com www.creekfm.com - FIFTY THOUSAND WATTS of POW WOW POWER!

1 0

Re: [CentOS] Kernel Errors Present...
by m.roth＠5-cent.us 12 Jan '11

12 Jan '11

Keith Roberts wrote: > On Wed, 12 Jan 2011, compdoc wrote: > >> To: 'CentOS mailing list' <centos(a)centos.org> >> From: compdoc <compdoc(a)hotrodpc.com> >> Subject: Re: [CentOS] Kernel Errors Present >> >> Bad sectors get reallocated automatically, so you might >> not find any with testing. You need to see how many have >> been reallocated. <snip> Maybe, but I'd fsck -C -c /dev/.... ^^ - check for bad blocks, put them in the table mark

4 8

Re: [CentOS] create account for Backup Exec 12.5 on Linux [RHEL5 or 4] to perform backup???
by Lisandro Grullon 12 Jan '11

12 Jan '11

Thank you for that Nico. >>> Nico Kadel-Garcia 01/12/11 4:27 PM >>> On Wed, Jan 12, 2011 at 4:18 PM, Lisandro Grullon wrote: > Hi Sven, > I like your line "This software is really crap!" I am a victim of this > "crap" myself. What do you personally use to backup your boxes, it would be > great to know since I am looking for an alternative. The last time I was given a choice, I used rsnapshot to back up to cheap, live disks with snapshots for NFS based file recovery, and Amanda to back up last snapshots to tape. _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos

1 0

Re: [CentOS] variable raid1 rebuild speed?
by m.roth＠5-cent.us 12 Jan '11

12 Jan '11

Les Mikesell wrote: > I have a 750Gb 3-member software raid1 where 2 partitions are always present and the > third is regularly rotated and re-synced (SATA disks in hot-swap bays). The timing of > the resync seems to be extremely variable recently, taking anywhere from 3 to 10 hours > even if the partition is unmounted and the drives aren't doing anything else and > regardless of what I echo into /proc/sys/dev/raid/speed_limit_min or _max. Is there > some way to tell if the drives are going bad or speed it up consistently if they aren't? Only thing I can think is if there's a lot of activity on the disks, with many, many gigs of files added or deleted. mark

2 1

RAID configuration suggestion???
by mcclnx mcc 12 Jan '11

12 Jan '11

we have several DELL R900 with PERC 6/E adapter in it. R900 using Redhat Linux. Each R900 have two PERC 6/E adapter and at least two MD1000 connect to it. Configuration 1: PERC 6/E -- two MD1000 PERC 6/E -- empty Configuration 2: PERC 6/E -- MD1000 PERC 6/E -- MD1000 Normally first MD1000 for database and second MD1000 for nightly backup. My co-worker told me there is NO difference on performance or battery life on botn configurations. I would like listen to your opinion on follwoing: 1. which configuration have better performance? 2. put two MD1000 on same PERC 6/E adapter will cause battery life shorter? 3. other comment? Thanks.

4 3

ext4 or XFS
by aurfalien＠gmail.com 12 Jan '11

12 Jan '11

Hi all, I've a 30TB hardware based RAID array. Wondering what you all thought of using ext4 over XFS. I've been a big XFS fan for years as I'm an Irix transplant but would like your opinions. This 30TB drive will be an NFS exported asset for my users housing home dirs and other frequently accessed files. - aurf

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