Discuss May 2008

discuss@lists.centos.org

268 participants
281 discussions

Blocking external usb storage
by whoami i 04 Jun '08

04 Jun '08

HI, This is my first mail to this mailing list.I want to block external usb storage completly on my server running on centos 5 having confidiential data. For that i used udev and blocked the external usb storage by creating the udev rule mentioning any usb storage will get mounted to /dev/null so that users cant mount as well. But in the mean time i am getting below logs in my /var/log/messages file when i insert any usb storage device. ###################################################### May 23 12:24:02 localhost kernel: usb 1-4: new high speed USB device using ehci_hcd and address 4 May 23 12:24:02 localhost kernel: usb 1-4: configuration #1 chosen from 1 choice May 23 12:24:02 localhost kernel: scsi3 : SCSI emulation for USB Mass Storage devices May 23 12:24:07 localhost kernel: scsi 3:0:0:0: Direct-Access USB Flash Disk 1100 PQ: 0 ANSI: 0 CCS May 23 12:24:07 localhost kernel: sd 3:0:0:0: [sdb] 1981440 512-byte hardware sectors (1014 MB) May 23 12:24:07 localhost kernel: sd 3:0:0:0: [sdb] Write Protect is off May 23 12:24:07 localhost kernel: sd 3:0:0:0: [sdb] Assuming drive cache: write through May 23 12:24:07 localhost kernel: sd 3:0:0:0: [sdb] 1981440 512-byte hardware sectors (1014 MB) May 23 12:24:07 localhost kernel: sd 3:0:0:0: [sdb] Write Protect is off May 23 12:24:07 localhost kernel: sd 3:0:0:0: [sdb] Assuming drive cache: write through May 23 12:24:07 localhost kernel: sdb: sdb1 May 23 12:24:07 localhost kernel: sd 3:0:0:0: [sdb] Attached SCSI removable disk May 23 12:24:07 localhost kernel: sd 3:0:0:0: Attached scsi generic sg2 type 0 ############################################## I want to know how device name sdb1[see above log] was allocated and is it possible to block the device node creation,if so wht i can do to block the same in my messages log. Regards lingu

9 8

CentOS-Samba question
by MHR 03 Jun '08

03 Jun '08

My main system is a CentOS 5.1 64-bit desktop with gobs of disk and a couple of printers attached that work just fine. I have it set up with samba so my VMWare guest Windows XP can access most of the files and the printers. But, when I try to connect to the printers from a remote machine that has a Win98/WinXP dual boot, I can't see the printers at all. Both 98/XP can ping the host by IP address or by name (I've updated the host on both and the lmhost file on the 98 boot), but the 98 boot can't see the network at all, and the XP boot can't see anything on my CentOS box, although it at least sees that the box is there. Here's my smb.conf: # Global parameters [global] workgroup = MARKHOME domain master = yes preferred master = yes server string = Samba Server printcap name = /etc/printcap cups options = raw log file = /var/log/samba/%m.log max log size = 50 password server = none username map = /etc/samba/smbusers socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192 wins support = yes dns proxy = no idmap uid = 16777216-33554431 idmap gid = 16777216-33554431 template shell = /bin/false winbind use default domain = no [homes] comment = Home Directories valid users = %S path = /home/%u create mask = 664 directory mask = 775 writeable = yes browseable = yes [tmp] comment = Temporary file space path = /tmp writeable = yes guest ok = yes [printers] comment = All Printers path = /var/spool/samba browseable = yes printable = yes What am I missing? Thanks. mhr

9 27

XFS install issue
by mslist＠opcenter.net 02 Jun '08

02 Jun '08

I am attempting to implement XFS on a new system. System: Supermicro SC846 TQ-R900B - rack-mountable SUPERMICRO X7DWN+ - motherboard 3ware 9650SE-24M8 - storage controller 10 Hitachi DeskStar 7K1000 - hard drive - 1 TB 8GB Ram 2 Intel Quad-Core Xeon E5420 / 2.5 GHz processor Installed Centos 5.1 X86 64 from DVD. System on /dev/sda1 250GB ext3 (raid 5). /home will be on /dev/sdb1 over 7TB XFS. Kernel version issue --------------------------------- [root@csfs50 work]# yum install kmod-xfs.x86_64 Loading "installonlyn" plugin Setting up Install Process Setting up repositories Reading repository metadata in from local files Parsing package install arguments Resolving Dependencies --> Populating transaction set with selected packages. Please wait. ---> Downloading header for kmod-xfs to pack into transaction set. kmod-xfs-0.4-1.2.6.18_53. 100% |=========================| 2.8 kB 00:00 ---> Package kmod-xfs.x86_64 0:0.4-1.2.6.18_53.1.19.el5 set to be installed --> Running transaction check --> Processing Dependency: kernel-x86_64 = 2.6.18-53.1.19.el5 for package: kmod-xfs --> Restarting Dependency Resolution with new changes. --> Populating transaction set with selected packages. Please wait. ---> Downloading header for kernel to pack into transaction set. kernel-2.6.18-53.1.19.el5 100% |=========================| 256 kB 00:00 ---> Package kernel.x86_64 0:2.6.18-53.1.19.el5 set to be installed --> Running transaction check Dependencies Resolved ============================================================================= Package Arch Version Repository Size ============================================================================= Installing: kmod-xfs x86_64 0.4-1.2.6.18_53.1.19.el5 extras 253 k Installing for dependencies: kernel x86_64 2.6.18-53.1.19.el5 updates 15 M Transaction Summary ============================================================================= Install 2 Package(s) Update 0 Package(s) Remove 0 Package(s) Total download size: 16 M Is this ok [y/N]: y Downloading Packages: (1/2): kmod-xfs-0.4-1.2.6 100% |=========================| 253 kB 00:00 (2/2): kernel-2.6.18-53.1 100% |=========================| 15 MB 00:02 Running Transaction Test Finished Transaction Test Transaction Check Error: package kernel-2.6.18-53.1.21.el5 (which is newer than kernel-2.6.18-53.1.19.el5) is already installed Error Summary -------------

5 5

drbd strategy
by sbeam 02 Jun '08

02 Jun '08

I have an existing in-production LAMP server running Centos 5.1. It uses physical partitions on top of hardware RAID1, having / /home /var and /boot on separate partitions. We have a near-identical system I am thinking of bringing in as a DRBD/Heartbeat companion. One solution may be to use csync2 [http://oss.linbit.com/csync2/] on /etc and /usr/local (the only areas that will differ from the stock CentOS). Then setup DRBD for /home and /var. From reading the docs it seems we have to use "external meta data" on the existing partitions. Other than that, anyone have any caveats or better ideas for this setup? Also - each has 2 NICs. Can Heartbeat do its pinging over the WAN (eth0) with eth1 dedicated to DRBD only? Is that how it is supposed to be, or should we use the serial ports? Sam

4 6

Setting Group owner of files on USB drive
by Robert Moskowitz 01 Jun '08

01 Jun '08

I just got a 8Gb flash drive and went to copy a bunch of files onto it. I wanted to perserve everything, so I just took my archiving rsync command and altered it to go to localhost:/media/RALLY2/ (name of flash drive). I am getting errors with changing the group owner. Huh? So I try to just use mkdir to create a directory on the flash drive. The directory has a group of root ??? So I try a chgrp and get: [root@mine me]# chgrp me /media/RALLY2/Stuff chgrp: changing group of `/media/RALLY2/Stuff': Operation not permitted OK why can't I set the group to something other than root? ls -lstr /media/ total 4 4 drwxr-xr-x 3 me root 4096 May 30 16:28 RALLY2 and of course for /media: 8 drwxr-xr-x 3 root root 4096 May 30 16:18 media

7 8

Fastest 4.6 -> 5.1 upgrade path
by Adrian Marsh 31 May '08

31 May '08

Hi All, I've a question on upgrading Centos with the least downtime... I've a centos 4.6 machine, hosting my local Centos respository. I'd like to upgrade the OS to 5.1 I've practised in a VMware machine upgrading it by booting from a CD, but I wondered if YUM could do it, whilst keeping the rest of the machine "alive". Am I better to shutdown and upgrade, or is yum really *that* good? Thanks, Adrian

5 6

another sed question...
by Craig White 31 May '08

31 May '08

Looking to change a yml file (yaml is a database type file) *** from --- !ruby/object:Right attributes: name: Personnel Admin action: index id: "1" controller: assessments --- !ruby/object:Right attributes: name: Personnel Admin action: find id: "2" controller: assessments *** to --- !ruby/object:Right attributes_1: name: Personnel Admin action: index id: "1" controller: assessments --- !ruby/object:Right attributes_2: name: Personnel Admin action: find id: "2" controller: assessments where I'm taking the 'id:' field from each record and inserting an underscore and the id into the 'attributes' label directly above. Any takers? Thanks Craig

4 5

CentOS-announce Digest, Vol 39, Issue 15
by centos-announce-request＠centos.org 31 May '08

31 May '08

Send CentOS-announce mailing list submissions to centos-announce(a)centos.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.centos.org/mailman/listinfo/centos-announce or, via email, send a message with subject or body 'help' to centos-announce-request(a)centos.org You can reach the person managing the list at centos-announce-owner(a)centos.org When replying, please edit your Subject line so it is more specific than "Re: Contents of CentOS-announce digest..." Today's Topics: 1. CESA-2008:0288 Critical CentOS 4 x86_64 samba Update (Johnny Hughes) 2. CESA-2008:0288 Critical CentOS 4 i386 samba Update (Johnny Hughes) ---------------------------------------------------------------------- Message: 1 Date: Fri, 30 May 2008 13:46:59 -0500 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CESA-2008:0288 Critical CentOS 4 x86_64 samba Update To: CentOS-Announce <centos-announce(a)centos.org> Message-ID: <48404BA3.2030409(a)centos.org> Content-Type: text/plain; charset="iso-8859-1" CentOS Errata and Security Advisory 2008:0288 Critical Upstream details at : https://rhn.redhat.com/errata/RHSA-2008-0288.html The following updated files have been uploaded and are currently syncing to the mirrors: x86_64: samba-3.0.25b-1.el4_6.5.x86_64.rpm samba-client-3.0.25b-1.el4_6.5.x86_64.rpm samba-common-3.0.25b-1.el4_6.5.i386.rpm samba-common-3.0.25b-1.el4_6.5.x86_64.rpm samba-swat-3.0.25b-1.el4_6.5.x86_64.rpm src: samba-3.0.25b-1.el4_6.5.src.rpm

1 0

Learning some sad things about the state of IPv6
by Robert Moskowitz 31 May '08

31 May '08

We have kernel support for IPv6 in Centos, but not stateful firewall support. That requires at least the 2.6.20 kernel, which means Fedora Core 6 or some other Linux distro. None of the various free Linux firewalls have IPv6 support. Supposedly FWBuilder can manage Netfilters for a Linux Kernel, but that seems to be the extent of it. More sad facts as I uncover them.....

7 10

alfresco
by dnk 30 May '08

30 May '08

Has anyone here setup alfresco on centos 5? I would like to speak to them off list about it if so. I am aware that they (alfresco) have a contributed wiki article about doing this, but i have run into some issues. DNK

2 6

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