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TeamCity & Jenkins behind Apache2 Proxy
by Paul Grenyer 19 Mar '12

19 Mar '12

Hi All (Please excuse the cross posting) I've Jenkins and TeamCity running on two separate VMs within my home network. I have another (physical) box running, among other things, Apache 2 (on Ubuntu server) and I have port 80 forwarded from my router to it. I've configured a number of virtual hosts on Apache, which work fine, and have proxies to two other web applications (subsonic & Nexus) running on Tomcat on the same box. What I want to do is add proxies for Jenkins and Tomcat. This is my configuration: <VirtualHost *:80> ... ProxyRequests Off ProxyPreserveHost On <Proxy *> Order allow,deny Allow from all </Proxy> ProxyPass /subsonic/ http://localhost:8080/subsonic/ ProxyPassReverse /subsonic/ http://localhost:8080/subsonic/ ProxyPass /nexus/ http://localhost:8080/nexus/ ProxyPassReverse /nexus/ http://localhost:8080/nexus/ ProxyPass /teamcity/ http://192.168.1.x1:8080/ ProxyPassReverse /teamcity/ http://192.168.1.x1:8080/ ProxyPass /jenkins/ http://192.168.1.15/ ProxyPassReverse /jenkins/ http://192.168.1.x2/ </VirtualHost> I think the Apache 2 configuration is fine and that the problems reside in the TeamCity and Jenkins configurations. I access them like this: http://<mydomain>/teamcity/ http://<mydomain>/jenkins/ In the case of TeamCity, it tries to redirect me to login.html, but looses the /teamcity/ part from the URL. In the case of Jenkins, the first obvious issue is that the CSS isn't referenced properly and some of the links don't work. I've done the obvious stuff like update the server URL for both TeamCity and Jenkins (just like I had to with Nexus). I've restarted everything, even the boxes/VMs. And Iv'e googled. I'm still stuck. Does anyone know what I'm doing wrong? -- Thanks Paul Paul Grenyer e: paul.grenyer(a)gmail.com b: paulgrenyer.blogspot.com t: pjgrenyer

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Backup Trigger Method
by Paul Grenyer 18 Mar '12

18 Mar '12

Hi all I want to setup some regular backups on my Ubuntu server box. I have done this before, but it was a while ago and I don't remember how I did it. I seem to remember dropping some scripts into directories the contents of which are executed at a particular interval. However, i can't find these directories on the server i did it on and google isn't helping, What's the best way to schedule backups? -- Thanks Paul Paul Grenyer e: paul.grenyer(a)gmail.com b: paulgrenyer.blogspot.com t: pjgrenyer

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How do USB drives get automounted? (mine don't and I'm trying to work out why)
by Chris Green 18 Mar '12

18 Mar '12

I have three xubuntu 11.10 systems running here, one is a 32-bit laptop and two are 64-bit desktop machines. USB drives plugged into the laptop and one of the dekstop machines get automounted correctly but on the other desktop machine although the USB drive is recognised (appears in dmesg as it should) it doesn't get automounted. So how can I diagnose what's wrong or missing on the desktop machine where the automounting doesn't work? I think it's *possible* that I have removed something necessary and/or misconfigured something as this machine is quite heavily customised. As I have a working machine and a non-working one I may be able to compare things between the two machines to see what is wrong but I need to know the sort of places I should be looking. What processes and packages are involved in automounting a USB drive? As I said it appears to be recognised correctly by the kernel, messages in dmesg and syslog are the same on both the system where it's not automounted and the system where it is. After the kernel has recognised the USB device as a mass storage device what then mounts it automatically and (if configured to do so, which it is) pops up thunar? Any/all help would be most welcome as this problem is getting really annoying! -- Chris Green

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[ALUG Announce] 3rd Monday Monthly Ipswich Social Meeting : McGintys, Northgate Street
by samwise 17 Mar '12

17 Mar '12

ALUG Announce Please send announcements to Announce(a)lists.alug.org.uk Unsub, change settings via http://lists.alug.org.uk/mailman/listinfo/announce ----- The monthly "Third Monday" ALUG Ipswich Social Meeting is back this Monday, 19th March, at 20:00: P J McGinty & Sons 15 Northgate Street Ipswich Suffolk IP1 3BY Tel: 01473 251 515 Map/Directions URI: http://maps.google.co.uk/?q=IP1+3BY WWW: http://www.pjmcgintys.co.uk/ McGintys pub is in the centre of Ipswich. It's directly opposite the town's central library and has a reputation for good Irish beer. We're usually to be found in the lowest section of the bar, near the library entrance to the pub. All are welcome, novices and experienced users. Feel free to ask for further information on the Main ALUG mailing list. *** I'll be there to start with but due to a rather big family medical issue, I may not be able to stick around for more than an hour. Will have to see on Monday. *** Peter. ----- 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

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Determining "my" LAN IP
by Mark Rogers 16 Mar '12

16 Mar '12

What's the best way (programatically) to determine the local IP which would be used to make a connection to a specific destination? By way of example, the following works: $ tracepath -n 192.168.251.132 1: 192.168.251.140 3.816ms pmtu 1500 1: ... $ tracepath -n 10.0.0.1 1: 10.0.0.140 1.455ms pmtu 1500 1: ... In other words the PC I ran it on has several IP addresses (and several interfaces), but from the above I can determine that for destination 192.168.251.132 by source IP will be 192.168.251.140, but for destination 10.0.0.1 it will be 10.0.0.140. However this is quite slow and messy, and there is surely a better way! Mark Rogers -- Mark Rogers // More Solutions Ltd (Peterborough Office) // 0844 251 1450 Registered in England (0456 0902) 21 Drakes Mews, Milton Keynes, MK8 0ER

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Any UDP comms experts here?
by Mark Rogers 16 Mar '12

16 Mar '12

I have a device I need to talk to via UDP from within PHP (although it feels like my problem here is a Linux one not a PHP one as everything is being done at the socket level anyway). I am sending a request to an Ethernet module in a PLC, and if I get the addressing wrong in my request then I get an error response back from the PLC as expected (by which I mean a 22 byte message sent via UDP containing the relevant error code) - I see this in my PHP code and in a Windows (Winsock-based) app I have that lets me send test queries and see the responses. However, when I get my addressing correct, whilst the Windows app gives me the response associated with the request I made, in my PHP/Linux code I just get no response (my code hangs up waiting). The PHP code I'm struggling with is: // Create a socket $socket = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP); // Build the message $msg = hex2str('80 00 02 00 01 00 00 11 00 00 05 01'); // Send the message socket_sendto($socket, $msg, strlen($msg), 0, '192.168.251.132', '9600'); // Get the response - this line never returns socket_recvfrom($socket, &$buf, /*Max response length*/250, /*Flags*/0, &$ip, &$port); I would guess that the Ethernet module in the PLC either responds immediately with a response to tell me I have the address wrong, or else has to go off and collect some data before sending it back, although the time this takes is milliseconds. If I set Flags to MSG_DONTWAIT the code no longer hangs; it just returns no characters, even if I put a delay of a couple of seconds before the function call. I'm pretty sure that the key to the solution lies in getting the flags right but there I'm stumped due to lack of knowledge (and everywhere I can find sample code the above works fine). The list of possible flags is in the PHP docs[1] but I think a fuller list would be those listed in "man 2 recv" Any suggestions? [1]http://www.php.net/manual/en/function.socket-recvfrom.php -- Mark Rogers // More Solutions Ltd (Peterborough Office) // 0844 251 1450 Registered in England (0456 0902) 21 Drakes Mews, Milton Keynes, MK8 0ER

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How to get rid of this duff directory?
by Chris Green 15 Mar '12

15 Mar '12

I think this may well be connected with my recent question about automounting. How do I get rid of this broken .gvfs directory:- -rw------- 1 chris chris 0 2012-01-03 10:28 .gtk-bookmarks -rw-rw-r-- 1 chris chris 82 2011-12-29 11:18 .gtkrc-2.0 d????????? ? ? ? ? ? .gvfs drwxr----- 2 chris chris 4096 2012-03-11 17:04 .hplip drwxrwxr-x 3 chris chris 4096 2012-02-15 20:20 .icedtea I can't even ls it directly:- chris$ ls -d .gvfs ls: cannot access .gvfs: Permission denied -- Chris Green

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What do these "Kernel Errors" mean?
by Chris Green 11 Mar '12

11 Mar '12

In my daily logwatch E-Mail I have just noticed the following:- WARNING: Kernel Errors Present EXT2-fs (sdd): error: can't find an e ...: 1 Time(s) EXT3-fs (sdd): error: can't find ext3 ...: 1 Time(s) ... ... ... usb 2-1.1: device descriptor read/64, error -32 ...: 4 Time(s) This possibly explains why the USB flash drive that was /dev/sdd failed to automount. It can be mounted without problems manually using a straightforward mount command. Can anyone explain what I need to do to fix it? The flash drive has a FAT16 file system on it as is normal I think. -- Chris Green

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Gimp help for non-artistic amateur...
by Mark Rogers 09 Mar '12

09 Mar '12

I have a (more-or-less) circular logo. I want to create a new logo which is basically a stack of coins, with the circular logo being the head of the top coin. Sounds simple but it's a bit beyond me - anyone with some actual talent care to point me in the right direction? Mark -- Mark Rogers // More Solutions Ltd (Peterborough Office) // 0844 251 1450 Registered in England (0456 0902) 21 Drakes Mews, Milton Keynes, MK8 0ER

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OT: Reliable ADSL VPN routers with 3G fallback?
by Mark Rogers 09 Mar '12

09 Mar '12

Any recommendations? Draytek 2830 (about £140+VAT) seems to be popular, although you need a 3G USB dongle as well. I'm going to be installing a small Linux box (see, almost on topic really!) at a remote site; it's job will be to collect data and send it to us via ADSL or (if ADSL unavailable) via 3G; VPN access required to allow us to reliably get back into the unit remotely if we need to. Not going to see all that much data traffic and never more than 1 or 2 people connected via VPN (usually nobody), so the Draytek may be overkill. -- Mark Rogers // More Solutions Ltd (Peterborough Office) // 0844 251 1450 Registered in England (0456 0902) 21 Drakes Mews, Milton Keynes, MK8 0ER

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1s cron-a-like
by Mark Rogers 08 Mar '12

08 Mar '12

I need to run a script every second. The script will complete within milliseconds so the hardware is capable, all I am looking for is a reliable way to schedule it. Basically I want a higher-resolution cron. Any suggestions? One option is to write a script which runs every minute and does along the lines of: for($i=0;$i<=59;$i++) { // do something sleep(1) } .. but I'd much rather find a daemon capable of kicking off the script every second (and ideally more flexibly like cron does, and with the logging capability etc that cron has). -- Mark Rogers // More Solutions Ltd (Peterborough Office) // 0844 251 1450 Registered in England (0456 0902) 21 Drakes Mews, Milton Keynes, MK8 0ER

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[ALUG Announce] ALUG Norwich Pub Meet Thursday 8th March
by Viperfang 05 Mar '12

05 Mar '12

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 Norwich Aluggers, Our monthly ALUG Norwich social meeting will be held this Thursday, 8th March 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

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Outlook "Rich Text" format (Not OT!!)
by Mark Rogers 02 Mar '12

02 Mar '12

One of my customers (using Outlook via Exchange) keeps sending me winmail.dat attachments. I know from experience that this means somewhere the message is being sent as "Rich Text" rather than "HTML". However he's checked and Outlook is set to use HTML. Any suggestions? I don't have Outlook installed (I don't think they have a Linux version yet :-), although I think it's possibly at an Exchange level anyway, and I know some people her administer both. It seems to be only affecting me - they haven't explicitly said this but I get the impression they can send attachments to (eg) Hotmail and Gmail which (as far as I know) don't support Rich Text either, so it may be something somewhere as got configured against my email address. But I'm just speculating! Something else they haven't said, but I can hear them thinking it, is "why don't you just use Outlook like everyone else", so I'd like to show this is a config problem their end not just me being "non-standard". Grrrrr.... Mark PS: I do have tnef installed so I can extract winmail.dat files but when all they're sending me is screenshots it's a pain not to be able to read them inline in Thunderbird. -- Mark Rogers // More Solutions Ltd (Peterborough Office) // 0844 251 1450 Registered in England (0456 0902) 21 Drakes Mews, Milton Keynes, MK8 0ER

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Is it just me?
by Ted.Harding＠wlandres.net 29 Feb '12

29 Feb '12

Hi Folks, For the last couple of days, readers' comments on articles in the Cambridge News can not (for me) be read beyound the first bunch. This looks like a Javascript problem (and I never had it before this week on this site). For example, have a look at the article: http://www.cambridge-news.co.uk/Home/ Passengers-stranded-as-doors-closed-too-soon-29022012.htm [also = http://tinyurl.com/6u9u599 ] You can read the first bunch of comments (currently 5 ot them) direactly at the end of the article. However, there are (allegedly) currently 4 bunches of comments in all (not surprsing for a story likr this). But if I click on any of the numbered boxes (or on the "Next", or "=>" arrow, or "Last" button), nothing happens. My firefox tells me that underlying the [1], [2], [3], [4], Next, and Last are: javascript:__doPostBack('ctl04$CommentTopPaging$rptPaging$ctl00$lbPage','') javascript:__doPostBack('ctl04$CommentTopPaging$rptPaging$ctl01$lbPage','') javascript:__doPostBack('ctl04$CommentTopPaging$rptPaging$ctl02$lbPage','') javascript:__doPostBack('ctl04$CommentTopPaging$rptPaging$ctl03$lbPage','') javascript:__doPostBack('ctl04$CommentTopPaging$lbNextPage','') javascript:__doPostBack('ctl04$CommentTopPaging$lbLastPage','') Do other people experience the same problem? If so, is the nature of the problem recognisable from these Javascript commands? With thanks, and best wishes to all, Ted. ------------------------------------------------- E-Mail: (Ted Harding) <Ted.Harding(a)wlandres.net> Date: 29-Feb-2012 Time: 19:24:02 This message was sent by XFMail -------------------------------------------------

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ftp on the blackboard
by Anthony Anson 29 Feb '12

29 Feb '12

Have Linux Phrasebook (Essential Code & Commands) and I can find no reference to ftp there. Could some kind person suggest a good place (webwise) to start looking for gen? (The button on the Firefox add-on won't appear, and demands new files, so can't use that, and it's irksome to have to use another box, fire-up XP, update AVG definitions, and use WS...) In case I haven't mentioned it, I managed to change the Eee's root password at last. -- Tony Anson www.girolle.co.uk/

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support for an end user in North London
by Peter Alcibiades 27 Feb '12

27 Feb '12

Hi, Does anyone know someone who would be prepared to support an end user in North London? There are two a standard Debian installations, used mainly for writing, web, email. One is a Thinkpad, the other a desktop. Happy to pay standard rates. It should not be all that often, but I am travelling to London less often than in the past and am looking for someone else to be able to refer him to. Write to me off list if there's anyone you can vouch for. Peter

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automount of USB drives not working - where should I look?
by Chris Green 22 Feb '12

22 Feb '12

I've just discovered that automounting of USB drives isn't working on my xubuntu 11.10 system. I can see the device with lsusb:- Bus 002 Device 005: ID 0951:1607 Kingston Technology DataTraveler 100 but no sign of it automounting. The "Mount removable drives when hot-plugged" setting is ticked and it always used to work (though I'm not absolutely sure it has worked since I upgraded to 11.10). Any ideas? -- Chris Green

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SQL question, I suspect I need some sort of inner join
by Chris Green 21 Feb '12

21 Feb '12

I have a sqlite table of temperatures with columns as follows:- id, Date, Time, Inside_Temperature, Outside_Temperature How do I get the date and time for the minimum and maximum temperatures for a specific year? It's easy enough to get the required temperature:- SELECT min(Inside_Temperature) from temperatures; ... and even to get the Date and Time associated with that:- SELECT Date, Time FROM temperatures WHERE Inside_Temperature = (SELECT min(Inside_Temperature) FROM temperatures); However if I want to find the minimum temperature in 2012 I'm a bit stuck. SELECT Date, Time FROM temperatures WHERE Inside_Temperature = (SELECT min(Inside_Temperature) FROM temperatures WHERE Date like '2012%'); ... returns dates in other years where the temperature happened to be the same. I can make the outer SELECT only look in 2012 but that's beginning to get a bit messy. Is there an easier/better way where I join using the id which matches the minimum temperature to select the other columns I want? -- Chris Green

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Off topic: dot IT domains
by John Woodard 20 Feb '12

20 Feb '12

Sorry if this is slightly off topic but I know the collective wisdom out there will know the answer to this one. Who is a good uk agent to reg a .it domain? The usual bulk reg sites like 123-reg don't seem to do them. Cheers, BJ

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[ALUG Announce] 3rd Monday Monthly Ipswich Social Meeting : McGintys, Northgate Street
by samwise 18 Feb '12

18 Feb '12

ALUG Announce Please send announcements to Announce(a)lists.alug.org.uk Unsub, change settings via http://lists.alug.org.uk/mailman/listinfo/announce ----- The monthly "Third Monday" ALUG Ipswich Social Meeting is back this Monday, 20th February, at 20:00: P J McGinty & Sons 15 Northgate Street Ipswich Suffolk IP1 3BY Tel: 01473 251 515 Map/Directions URI: http://maps.google.co.uk/?q=IP1+3BY WWW: http://www.pjmcgintys.co.uk/ McGintys pub is in the centre of Ipswich. It's directly opposite the town's central library and has a reputation for good Irish beer. We're usually to be found in the lowest section of the bar, near the library entrance to the pub. All are welcome, novices and experienced users. Feel free to ask for further information on the Main ALUG mailing list. ** I'm not going to be able to attend this month, as I'm going to be in London attending a gaming industry panel event [https://baftagamesqt1.eventbrite.com/] on Monday evening, so please shout up on the mailing list if you're attending so other attendees know who to look out for. ** Peter. ----- 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

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Strange lack of PHP error reporting
by Chris Green 14 Feb '12

14 Feb '12

I'm having a real hard time at the moment because for some reason PHP errors (in web pages) don't seem to get reported anywhere. I've narrowed the problem down a bit, if I put a PHP file in my root web directory then any errors *are* reported. However if I put an error into some of the code in my wiki nothing happens except that I get a completely blank page. I've looked at the .htaccess file, no joy there, doesn't set anything relevant. There's nothing appearing in the apache log file either, total silence. Any ideas? -- Chris Green

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How to set permissions on an ethernet port?
by Chris Green 14 Feb '12

14 Feb '12

How can I set the permissions on eth0 to allow me (as opposed to root) to modify it? I want to use macchanger from a script and I don't want to have to enter my password every time I run the script. I assume it's the same sort of permission that one would need to be able to use ifconfig to change things on a network interface. -- Chris Green

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GIMP
by Bev Nicolson 13 Feb '12

13 Feb '12

I may have a book on it, I may have the online manual but can I get GIMP to heal a smudge on a photo? Not so far. Anyone got any tips? Many thanks. Bev.

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Re: [ALUG] Another thing...
by Wayne Stallwood 09 Feb '12

09 Feb '12

On 07/02/12 12:28, Anthony Anson wrote: > > Why do I need Nero? Several times I've burnt a CD or DVD using the > offerings with Squeeze, and sometimes, all that was laid down was a > batch of empty directories. Hmm I have had that a few times with the built in Gnome burning....k3b however has been good to me over the years even if it does need a million KDE libraries installed.

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Regular expression question
by Chris Green 08 Feb '12

08 Feb '12

I want a regular expression to select text between /x and /, e.g. I'm wanting to look at something like:- /x This is a load of multi-line text and some more and more / ... and get the three lines of text (with/without the end bits). However I want it to be non-greedy so that:- /x Here is some text / and some more / ... will return only the "Here is some text" bit. So, a simple regular expression like '^/x[^/]*/' gets me what I want. However, I'm trying to make this a bit cleverer so that embedded / characters don't break it. So the next try is '^/x.*/\n', this works to an extent but it's 'greedy' so giving it the second example means that it returns both "Here is some text" and "and some more". Is there a way of saying "not /\n", or any other way of saying 'non-greedy'? This is using PHP regular expression searches. -- Chris Green

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