Discuss February 2011

discuss@lists.centos.org

267 participants
208 discussions

Samba quota for AD users
by system minami 03 Mar '11

03 Mar '11

Can someone please help how to enable samba quota for Active Directory users' home directory automatically ? Many thanks, Michael

4 6

IP6 Anyone?
by Always Learning 02 Mar '11

02 Mar '11

Today I received an allocation of IP6 addresses for some servers. I can 'play' with the last 2 of the 8 IP6 address segments. I always thought, mistakenly, IP6 was 6 segments, because it was IP6. IP4 had 4 segments. However IP6 is actually IP version 6 and it has 8 segments. The other interesting discovers are: :: means one or more 0 segments, example :: can mean 0:0:0: or just 0:0: or even 0:0:0:0: and, a real smile making favourite, is IP6 breaks Micro$oft's set-up. Micro$oft can not handle actual IP6 addresses because : is forbidden by Micro$oft in its 'Uniform Naming Convention (UNC) path names'. Naturally Micro%oft has invented a 'work around' solution. http://en.wikipedia.org/wiki/IPv6_address#Literal_IPv6_addresses_in_UNC_pat… Because : is sometimes used in an address to indicate the start of a port number, example http://www.anyonejunk.com:1234, the IP6 address can be enclosed within [ ] with the port number remaining outside the square brackets. How will IP6 affect the software in Centos and what gradual changes should one make on the transition to a major Internet change with the ending of NAT for IP4 addresses and a more secure (IPsec) end to end transmission protocol? -- With best regards, Paul. England, EU.

5 11

CentOS MD RAID 1 on Openfiler iSCSI
by Emmanuel Noobadmin 02 Mar '11

02 Mar '11

Has anybody tried or knows if it is possible to create a MD RAID1 device using networked iSCSI devices like those created using OpenFiler? The idea I'm thinking of here is to use two OpenFiler servers with physical drives in RAID 1, to create iSCSI virtual devices and run CentOS guest VMs off the MD RAID 1 device. Since theoretically, this setup would survive both a single physical drive failure as well as a machine failure on the storage side with a much shorter failover time than say using heartbeat. Or is this yet another stupid idea again from me? :D

9 36

Alternative to cPanel
by Trutwin, Joshua 01 Mar '11

01 Mar '11

Hello all, I'm looking to setup a new CentOS box for a buddy of mine who wants to do hosting on a server via CoLo, Years ago I whipped up a CP of my own on a Debian box he colo'd running a basterdized qmail/tinydns and custom built httpd/mysql/etc (I was young). It worked ok but time to move on and I don't have time to maintain all those packages. I also don't have time to write another CP or port my PoS to it. I'm also just going to use the default packages (bind, postfix, etc) instead of the DJB stuff. Main requirements are fairly straightforward: 1. able to add/manage domains, ssl cert management, manage DNS records 2. able to manage email accounts and anti-spam settings 3. able to add/manage mysql and pgsql (nice to have) 4. user management - ftp/ssh accounts, password change, etc. 5. nice to have: add a wordpress blog / xcart store to a site 6. nice to have: users have own login to do some of the above for their domain only 7. nice to have: integrated website stats (awstats or equiv) 8. not optional - should have a focus on security Stuff like viewing logs, automated billing, hosting plans, managing backups, bandwidth monitoring, uploading web pages, managing server patches, adding new software, etc. I don't mind leaving off or doing myself. Willing to pay a license, but not a huge budget. I was leaning towards webmin/virtualmin but thought I'd check with this list for any suggestions. Had bad experiences with Plesk from a while ago so leaving that off the table. We have experience with cPanel through another fail host, it's ok but too much stuff and too expensive. Josh

17 24

Dhcp 3.0.5 on 5.x
by Jason Pyeron 01 Mar '11

01 Mar '11

I am looking to use the update-conflict-detection false; directive in the dhcpd.conf. It is supported in EL6 or and dhcp >=3.1.0a1. Since I am not going to get permission to switch to EL6 or dhcp 3.1 what are my options? Background: I have a DNS/DHCPD system which its conf files are generated automagically. Depending on which network a device is on the ip address will change. It is always required to have an A record for every device. I see my only 2 possible options to be: 1, trick dhcpd into thinking that the records in dns are its, hence updatable. 2, backport the update-conflict-detection false logic into dhcp-3.0.5-23.el5_5.2 Any suggestions? TIA -- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- - - - Jason Pyeron PD Inc. http://www.pdinc.us - - Principal Consultant 10 West 24th Street #100 - - +1 (443) 269-1555 x333 Baltimore, Maryland 21218 - - - -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- This message is copyright PD Inc, subject to license 20080407P00.

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cronjob to intiiate checkdisk ?
by Roland RoLaNd 01 Mar '11

01 Mar '11

Dear all, I'm trying to find a way to automate checkdisk every 1 month on a weekend. in other words i want checkdisk to run every saturday morning. i can of course change the default mount/count though that wont let me control WHEN it will happen. so i need your expert opinion with the following if possible: 1. reboot into single user mode 2. start checkdisk for all disks 3. once done, reboot into runlevel 3 i've did a certain script that force checkdisk at night if there's a bad sector using the badblocks command though that's not enough. PS: i was thinking of something of this sort: 1 4 * sat /bin/touch /forcefsck;reboot 1 1 * sun rm /forcefsck Would the above work? for all disks?

3 2

Sorting by date
by erikmccaskey64 01 Mar '11

01 Mar '11

Original: Jan 23 2011 10:42 SOMETHING 2007.12.20.avi Jun 26 2009 SOMETHING 2009.06.25.avi Feb 12 2010 SOMETHING 2010.02.11.avi Jan 29 2011 09:17 SOMETHING 2011.01.27.avi Feb 11 2011 20:06 SOMETHING 2011.02.10.avi Feb 27 2011 23:05 SOMETHING 2011.02.24.avi Output: Feb 27 2011 23:05 SOMETHING 2011.02.24.avi Feb 11 2011 20:06 SOMETHING 2011.02.10.avi Jan 29 2011 09:17 SOMETHING 2011.01.27.avi Jan 23 2011 10:42 SOMETHING 2007.12.20.avi Feb 12 2010 SOMETHING 2010.02.11.avi Jun 26 2009 SOMETHING 2009.06.25.avi How could I get the output where the newest file is at the top?

7 6

can't disconnec iSCSI targets, please help
by Rudi Ahlers 01 Mar '11

01 Mar '11

Hi, I'm trying to disconnect some iSCSI targets, but can't seem to. [root@localhost ~]# iscsiadm -m session tcp: [1] 192.168.2.202:3260,1 iqn.2011.01.22.freenas.nvr:500gb tcp: [3] 192.168.2.200:3260,1 iqn.2011-2.za.co.securehosting:RAID.thin3.vg0.1tba tcp: [4] 192.168.2.202:3260,1 iqn.2011.01.22.freenas.nvr:extent0 tcp: [5] 192.168.2.200:3260,1 iqn.2011-2.za.co.securehosting:RAID.iscsi0.vg0.500gb I need to disconnect all 4 of these [root@localhost ~]# iscsiadm -m node -T 192.168.2.200:3260,1 iqn.2011-2.za.co.securehosting:RAID.iscsi0.vg0.500gb -p 196.34.136.200 --logout The target is still there, even though I tell it to disconnect. [root@localhost ~]# iscsiadm -m session tcp: [1] 192.168.2.202:3260,1 iqn.2011.01.22.freenas.nvr:500gb tcp: [3] 192.168.2.200:3260,1 iqn.2011-2.za.co.securehosting:RAID.thin3.vg0.1tba tcp: [4] 192.168.2.202:3260,1 iqn.2011.01.22.freenas.nvr:extent0 tcp: [5] 192.168.2.200:3260,1 iqn.2011-2.za.co.securehosting:RAID.iscsi0.vg0.500gb I can't delete it either: [root@localhost ~]# iscsiadm -m node --op delete --targetname 192.168.2.202:3260,1 iqn.2011.01.22.freenas.nvr:500gb iscsiadm: no records found! Restarting iscsi gives some odd errors: [root@localhost ~]# /etc/init.d/iscsi restart Logging out of session [sid: 1, target: iqn.2011.01.22.freenas.nvr:500gb, portal: 192.168.2.202,3260] Logging out of session [sid: 3, target: iqn.2011-2.za.co.securehosting:RAID.thin3.vg0.1tba, portal: 192.168.2.200,3260] Logging out of session [sid: 4, target: iqn.2011.01.22.freenas.nvr:extent0, portal: 192.168.2.202,3260] Logging out of session [sid: 5, target: iqn.2011-2.za.co.securehosting:RAID.iscsi0.vg0.500gb, portal: 192.168.2.200,3260] Logout of [sid: 1, target: iqn.2011.01.22.freenas.nvr:500gb, portal: 192.168.2.202,3260]: successful Logout of [sid: 3, target: iqn.2011-2.za.co.securehosting:RAID.thin3.vg0.1tba, portal: 192.168.2.200,3260]: successful Logout of [sid: 4, target: iqn.2011.01.22.freenas.nvr:extent0, portal: 192.168.2.202,3260]: successful Logout of [sid: 5, target: iqn.2011-2.za.co.securehosting:RAID.iscsi0.vg0.500gb, portal: 192.168.2.200,3260]: successful Stopping iSCSI daemon: iscsid dead but pid file exists [ OK ] Starting iSCSI daemon: [ OK ] [ OK ] Setting up iSCSI targets: Logging in to [iface: default, target: iqn.2011.01.22.freenas.nvr:500gb, portal: 192.168.2.202,3260] Logging in to [iface: default, target: iqn.2011-2.za.co.securehosting:RAID.thin1.vg0.2tb, portal: 192.168.2.200,3260] Logging in to [iface: default, target: iqn.2011-2.za.co.securehosting:RAID.thin3.vg0.1tba, portal: 192.168.2.200,3260] Logging in to [iface: default, target: iqn.2011.01.22.freenas.nvr:extent0, portal: 192.168.2.202,3260] Logging in to [iface: default, target: iqn.2011-2.za.co.securehosting:RAID.iscsi0.vg0.500gb, portal: 192.168.2.200,3260] Logging in to [iface: default, target: iqn.2011-2.za.co.securehosting:RAID.thin2.vg0.1tb, portal: 192.168.2.200,3260] Login to [iface: default, target: iqn.2011.01.22.freenas.nvr:500gb, portal: 192.168.2.202,3260]: successful iscsiadm: Could not login to [iface: default, target: iqn.2011-2.za.co.securehosting:RAID.thin1.vg0.2tb, portal: 192.168.2.200,3260]: iscsiadm: initiator reported error (19 - encountered non-retryable iSCSI login failure) Login to [iface: default, target: iqn.2011-2.za.co.securehosting:RAID.thin3.vg0.1tba, portal: 192.168.2.200,3260]: successful Login to [iface: default, target: iqn.2011.01.22.freenas.nvr:extent0, portal: 192.168.2.202,3260]: successful Login to [iface: default, target: iqn.2011-2.za.co.securehosting:RAID.iscsi0.vg0.500gb, portal: 192.168.2.200,3260]: successful iscsiadm: Could not login to [iface: default, target: iqn.2011-2.za.co.securehosting:RAID.thin2.vg0.1tb, portal: 192.168.2.200,3260]: iscsiadm: initiator reported error (19 - encountered non-retryable iSCSI login failure) iscsiadm: Could not log into all portals. Err 19. Interestingly, the targets which iscsi reports as not existing, does exist: [root@localhost ~]# iscsiadm -m discovery -t sendtargets -p 192.168.2.200 192.168.2.200:3260,1 iqn.2011-2.za.co.securehosting:RAID.thin1.vg0.2tb 192.168.2.200:3260,1 iqn.2011-2.za.co.securehosting:RAID.thin3.vg0.1tba 192.168.2.200:3260,1 iqn.2011-2.za.co.securehosting:RAID.iscsi0.vg0.500gb 192.168.2.200:3260,1 iqn.2011-2.za.co.securehosting:RAID.thin2.vg0.1tb Is there any other way to force these disconnects, and re-connect them? The machine runs on CentOS 5.5 x64 + XEN: [root@localhost ~]# cat /etc/redhat-release CentOS release 5.5 (Final) [root@localhost ~]# uname -a Linux localhost.localdomain 2.6.18-194.el5xen #1 SMP Fri Apr 2 15:34:40 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux [root@localhost ~]# -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532

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Re: [CentOS] Octet - off topic
by Always Learning 28 Feb '11

28 Feb '11

On Sun, 2011-02-27 at 22:38 -0600, Larry Vaden wrote: > On Sun, Feb 27, 2011 at 5:48 PM, Always Learning <centos(a)g7.u22.net> wrote: > > > > At my second computer job in 1967 on a Honeywell H-120 (a baby machine > > with 3 tapes which took 1 hour to do a Cobol compilation ... > I have always hoped to find someone who was involved with COBOL back > in the days to ask this question of: > > "What influence did Commander Grace Hopper have on COBOL?" Don't know. Grace was occasionally mentioned in the computer press for getting awards in the USA (I think she was in the USA Navy) but we programmers, new to a new world of computing, just wrote programmes, debugged them, did some systems analysis and ventured into assembler coding and system programming. Grace never ever influenced me or anyone else I knew who did Cobol. She was just a name to the majority who programmed in Cobol. I used to think it took someone 2 years of writing in Cobol to become efficient in using it and visualising solutions which could be implemented in it. Well written Cobol was easy to maintain but some clowns never properly used the self documenting features of the language (i.e. meaningful data names - contrast with add csum to itotal). The alternative was longer data names, for example inv-gross-total, inv-delivery-cost and overdue-3-mths-total etc. Many programmed in Cobol but fewer used the language to its designed extent. The worse thing about Cobol was the long windiness of it before one came to the Procedure Division. Later on Picture became Pic and very useful string handling was introduced (the alternative was refining the same field multiple times). It used to be my favourite language, after Easycoder and 6502 assembler, then I discovered PHP. -- With best regards, Paul. England, EU.

2 1

how to make centos safty(php+mysql)
by Yang Yang 28 Feb '11

28 Feb '11

hi,every i have a php project and use centos to go and how to make folder's privilage and make it saft like: /home/htdocs/test chown -R www:www /home/htdocs/test chmod -R 644 /home/htdocs/test etc thanks very much

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Discuss February 2011