main July 2011

main@lists.alug.org.uk

20 participants
24 discussions

Installing Ununtu server to degraded RAID
by Mark Rogers 13 Jul '11

13 Jul '11

I want to set up a server using software RAID1 as follows: - Install single disk, do the OS install (Ubuntu server 11.04), creating RAID array (but degraded as only one disk) - Boot the system and check it all works - Install second disk and add to array The install works fine (I create an md partition and an array of 2 devices but only add one to it), and install grub to /dev/sda1 as usual. However it won't boot. Grub starts and gives me my menu, but gets no further. Suggestions? Am I doing this all wrong? (Reason for doing this: migrating an existing RAID1 array using the onboard RAID to an mdraid array; I want to keep one of the original disks to recover some files off once the system is up before wiping it and adding it to the new array. But also I want to confirm that my new array will boot with only one disk otherwise there's not a lot of point to it!) -- Mark Rogers // More Solutions Ltd (Peterborough Office) // 0844 251 1450 Registered in England (0456 0902) 21 Drakes Mews, Milton Keynes, MK8 0ER

2 5

[ALUG Announce] ALUG Norwich Pub Meet Thursday 14th July
by Viperfang 11 Jul '11

11 Jul '11

ALUG Announce Please send announcements to Announce(a)lists.alug.org.uk Unsub, change settings via http://lists.alug.org.uk/mailman/listinfo/announce ----- Hello Aluggers, Our monthly ALUG Norwich social meeting will be held this Thursday, 14th July at The Coach and Horses (82 Thorpe Road, Norwich, NR1 1BA). The meeting officially starts at 8pm, although some people may arrive earlier. More information on those people can be found on the list and the IRC channel. If you are unsure if you will recognise us then make yourself and your intent to attend known by either posting on list or visiting us on IRC so we can look out for you rather than hiding in the corner. Optionally you could ask at the bar if they know where the geeky computer weirdos are and they'll point you in the right direction (seriously!). Another possibility is look for heaps of electronics on a table that may possibly look like movie props that would used for detonating explosives. Feel free to bring electronics/laptops/gadgets to the meet, you will by no means be alone. Ben Bewick aka Viperfang NB: This mail is automated, please refer to the usual sources for more information. ALUG Contact Details: Website : http://www.alug.org.uk/ IRC : #alug on irc.alug.org.uk List : http://lists.alug.org.uk/mailman/listinfo Twitter : http://twitter.com/anglianlug Identica: TBA Facebook: http://www.facebook.com/group.php?gid=2381613902 ----- Send discussion replies to main(a)lists.alug.org.uk (Reply-To set) Unsub, change settings via http://lists.alug.org.uk/mailman/listinfo/announce

1 0

Reg Exp question
by Stuart Bailey 08 Jul '11

08 Jul '11

Hello, I'm trying to search for a file name by pattern that will output the full path and timestamps. I've tried using ls -Rl | grep "^\." to show all the directories. but then I need to show all files within those directories that match my pattern, eg *abc.png Can I do this with my reg exp? Find does not give the timestamps. Many thanks, Stuart Bailey BSc (hons) CEng CITP MBCS LinuSoft (Managing Director) Linux Specialist & Software Developer ~~~~~~~~~~~~~~~~~~~~~~~ Phone: (0845) 658 3563 Direct: +44 (0) 1953 878162 Fax: +44 (0) 1603 858583 ~~~~~~~~~~~~~~~~~~~~~~~ http://www.linusoft.co.uk __________ Information from ESET Mail Security, version of virus signature database 6276 (20110708) __________ The message was checked by ESET Mail Security. http://www.eset.com

2 2

Re: [ALUG] Reg Exp question
by James Bensley 08 Jul '11

08 Jul '11

Classic school boy reply-to-person-not-to-list fail On 8 July 2011 11:37, James Bensley <jwbensley(a)gmail.com> wrote: > I'm not sure i' I under stand your request but are you looking for: > ls -Rl | grep ".abc.png" > > -- > James. > http://www.jamesbensley.co.cc/

1 0

APC UPS Batteries (RBC18) going spare
by Mark Rogers 07 Jul '11

07 Jul '11

If anyone is interested I have a box of used but working RBC18 battery sets from APC UPS's. Basically they've been replaced as part of routine maintenance, they've been in use approx 2yrs. I need to know asap (today) if there's interest else they'll probably go off to recycling. They'd need collecting from our office in Peterborough. -- Mark Rogers // More Solutions Ltd (Peterborough Office) // 0844 251 1450 Registered in England (0456 0902) @ 13 Clarke Rd, Milton Keynes, MK1 1LG

1 0

Re: [ALUG] svn tags, branches, etc
by Phil Ashby 06 Jul '11

06 Jul '11

Mark Rogers wrote: >> After an hour or so of reading tutorials and trawling Google I'm >> still stuck on something. I find the best place to start is the on line official book. Here's chapter 4 on branches (and merging): http://svnbook.red-bean.com/nightly/en/svn.branchmerge.using.html >> Suppose I want to call my current software tree "v1", and create a >> copy to become "v2". The software is a PHP web library and basically >> the purpose of v2 is to start removing all the old PHP3/PHP4 >> compatibility code, and tidy things up, thus breaking backwards >> compatibility. >> >> I think I start with something like: >> svn copy -m "v2" <svnrepo> <svnrepo>/tags/v1 >> svn copy -m "v2" <svnrepo> <svnrepo>/tags/v2 >> >> My current code is already in a directory ~/mylib/v1, and I want to >> keep that as it is (several apps on the server are using it), and >> checkout v2 directory ~/mylib/v2; new apps will start to use that >> version. AIUI, you should be able to create a branch for v2 development without affecting the v1 tree, just by doing this: svn copy -m 'making v2 branch' <repo>/mylib/v1 <repo>/mylib/v2 >> So far so good. Where I'm stuck is how to make sure that ~/mylib/v1 >> stays on the v1 branch so I can continue to fix bugs and add >> features (unlikely but possible) to it if I need to, and ~/mylib/v2 >> similarly stays on the v2 branch. Both will have regular commits to >> their respective branches, and I may want to merge fixes from v1 >> into v2 (and vice versa). In other words v1 will become v1.0.1, >> v1.0.2, ... and v2 will independently become v2.0.1, v2.0.2, ... >> whilst sharing common history and allowing me to migrate some >> changes between branches. According to the book, you can now check out your v2 branch to a separate working area: svn checkout <repo>/mylib/v2 ..where you can continue development of v2 separate from the v1 working area. These two work areas will initially be the same of course, however changes checked into v2 will not appear in v1 and vice versa. If you want to 'tag' specific releases of anything, you simply copy the relevant tree again, but give it a tag name eg: svn copy <repo>/mylib/v1 <repo>/mylib/v1.0.3 ..this is the same as creating a branch, thus the *humans* have to understand that this directory should not have changes committed (you can also use the paranoid access control mentioned in the book to prevent this happening). Merging is covered in the next page of the book (after branching): http://svnbook.red-bean.com/nightly/en/svn.branchmerge.basicmerging.html ..where you will want to merge specific changes (that fix specific bugs) from one branch to the other. This works well as long as the humans don't commit bug fixes with other work, preventing the selection of changes by a changeset number (read the part on cherrypicking). HTH, Phil

1 0

svn tags, branches, etc
by Mark Rogers 05 Jul '11

05 Jul '11

After an hour or so of reading tutorials and trawling Google I'm still stuck on something. Suppose I want to call my current software tree "v1", and create a copy to become "v2". The software is a PHP web library and basically the purpose of v2 is to start removing all the old PHP3/PHP4 compatibility code, and tidy things up, thus breaking backwards compatibility. I think I start with something like: svn copy -m "v2" <svnrepo> <svnrepo>/tags/v1 svn copy -m "v2" <svnrepo> <svnrepo>/tags/v2 My current code is already in a directory ~/mylib/v1, and I want to keep that as it is (several apps on the server are using it), and checkout v2 directory ~/mylib/v2; new apps will start to use that version. So far so good. Where I'm stuck is how to make sure that ~/mylib/v1 stays on the v1 branch so I can continue to fix bugs and add features (unlikely but possible) to it if I need to, and ~/mylib/v2 similarly stays on the v2 branch. Both will have regular commits to their respective branches, and I may want to merge fixes from v1 into v2 (and vice versa). In other words v1 will become v1.0.1, v1.0.2, ... and v2 will independently become v2.0.1, v2.0.2, ... whilst sharing common history and allowing me to migrate some changes between branches. I think all I need to do is make sure in each directory I switch to the right branch and then any commits/copys will apply to that branch only, but everything I've read talks in terms of the branch being temporary while a new feature is added, rather than permanent with the intention of maintaining v1 and v2 as separate versions going forward (and no doubt spawning v3 from v2 at some point down the line). Before I go too far I just want to be sure I'm on the right track. -- Mark Rogers // More Solutions Ltd (Peterborough Office) // 0844 251 1450 Registered in England (0456 0902) @ 13 Clarke Rd, Milton Keynes, MK1 1LG

3 5

Unwanted "600" perms from Acroread
by ted.harding＠wlandres.net 04 Jul '11

04 Jul '11

Greetings! Maybe someone has an answer to this! If I open a PDF file in Acrobat Reader (ths file initially having '644' permissions), and then "print to file" (so that I have a PostScript version of it), the permissions of the PS file generated by Acrobat Reader are '600'. This is not a particular problem when I am working in the same directory as the file is in. However, when that machine is NFS-mounted to the machine that does my printing, and I 'lpr' the PS file from the printing machine, then the '600' prevents printing (I get error message "empty file"). This is because the '600' does not allow outsiders to access the file. All is well if I manually change the PS file permissions in the original directory to '644', since this now allows access. So my question: Is there a way to get Acrobat Reader to store the PS file it outputs with '644' permissions instead of '600'? I've had a bit of a look at the Acrobat Reader menus, without seeing anything helpful. With thanks, Ted. -------------------------------------------------------------------- E-Mail: (Ted Harding) <ted.harding(a)wlandres.net> Fax-to-email: +44 (0)870 094 0861 Date: 02-Jul-11 Time: 22:17:31 ------------------------------ XFMail ------------------------------

3 3

How to diagnose an intermittent web access 'hang'?
by Chris G 02 Jul '11

02 Jul '11

I have a strange problem when I try and access my home LAN web server from home. Once in every three or four connections the web server hangs for several minutes before the data is delivered. This happens when I access the pages as http://zbmc.eu/xxx/yyy. I was going to say that the data is eventually delivered but one I just tried returned a "The connection has timed out" message. If I access the same pages as http://localhost/xxx/yyy then it all works perfectly, no hangs. Now the 'fly in the ointment' as it were is that my ADSL connection uses two ADSL providers on two telephone lines, the sharing is provided by my Draytek Vigor 2820n router. I *suspect* that its the sharing in the router that causes the problem, but it doesn't happen for other URLs, just for http://zbmc.eu/ URLs. Any suggestions for how to diagnose what's going on? -- Chris Green

5 7

Imaging Windows dynamic disks using Linux
by Mark Rogers 02 Jul '11

02 Jul '11

I have a guy on site trying to replace a hard disk in a server (W2003); simple job: shut the server down and image it to a new disk, boot from new disk, walk away. Except it turns out not to be a single disk, it's two disks using Windows dynamic RAID which I know nothing about, but his imaging software doesn't handle it (Acronis). Anyone have any experience of imaging these disks using any of the various Linux options? Ideally I'm looking for something that'll be a small download as he only has limited Internet, and it would be even better if he can boot it from a USB thumb drive as he doesn't have a blank CD with him, although he can probably scrounge one from someone if he has to. -- Mark Rogers // More Solutions Ltd (Peterborough Office) // 0844 251 1450 Registered in England (0456 0902) @ 13 Clarke Rd, Milton Keynes, MK1 1LG

3 7

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

1997

main July 2011