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Re: [ALUG] program for simple graph representation recommendation?
by mark fernandes (IFR) 17 Jun '13

17 Jun '13

Gnuplot is really good for doing quality plots (Good enough for scientific papers). The output terminals include screen, LaTEX, png, SVG, EPS and PDF. The dreaded Wackypedia has a reasonable amount of info (I would especially recommend the IBM tutorial - it really got me started with GNUplot) http://en.wikipedia.org/wiki/Gnuplot If you need a non-Windows GUI there is a Java GUI for GNUplot (I haven't tried it so YMMV) see http://sourceforge.net/projects/jgp/ Hope that this helps, Mark

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[ALUG Announce] 3rd Monday Monthly Ipswich Social Meeting : The Mulberry Tree
by samwise 17 Jun '13

17 Jun '13

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 today, 17th June, at 20:00: The Mulberry Tree 5 Woodbridge Road IPSWICH IP4 2EA Tel: 01473 225776 Map/Directions URI: http://maps.google.co.uk/?q=IP4+2EA WWW: https://www.facebook.com/MULBERRYHOSPITALITY The Mulberry Tree, previously known as The Milestone Beer House, is a grade 2 listed building in the centre of Ipswich. It is located at the intersection between Woodbridge Road and the A1156, across the road from the old Odeon cinema and not far from the Regent Theatre. It re-opened on Thursday March 29th 2012 after a major refurbishment, under its original name of The Mulberry House and has already begun to regain a good reputation for its selection of beers and ales. It has a sizeable car park to the rear of the building. All are welcome, novices and experienced users. Feel free to ask for further information on the Main ALUG mailing list. Cheers, 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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program for simple graph representation recommendation?
by Anthony Anson 14 Jun '13

14 Jun '13

I want to make a simple linear graph of blood-pressure readings over a month with a minimum interval of half an hour. (Greater intervals will have to be 'understood' by interpolation.) Ideally the background would be squares (to make it easier for me...) and it doesn't matter whether the plotted lines are vertical or horizontal - just so long as they are scrollable. Exportability to pdf would be an advantage All suggestions appreciated. -- Tony http://www.girolle.co.uk/

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Confused about mdstat output
by Mark Rogers 14 Jun '13

14 Jun '13

cat /proc/mdstat gives me: md1 : active raid5 sdi1[4](S) sdh1[2](F) sdg1[1] sdf1[0] 5860145664 blocks super 1.2 level 5, 512k chunk, algorithm 2 [4/2] [UU__] The history of this array is that it was a functioning RAID5 array, that wasn't really being used. I pulled one of the disks out for other uses temporarily, then wiped it and returned it, the idea being that it was returned to the array as a "new" disk to replace the "failed" (removed) one, albeit that it was actually the same disk. This is the RAID array that's been causing problems via a USB caddy (I now have a cheap SATA card that seems to work reliably). I was able to mount the array (albeit degraded because it was missing a disk) with the disk removed. Now I can't (makes sense, 2-out-of-4 disks in a RAID5 array isn't going to work very well!). My reading of mdstat is that sdi1 is currently "spare" (I think that's the one that came out and went back in), and that sdh1 has failed. Seems like quite a coincidence. As I said, the data on the array wasn't important, I'm using this as an opportunity to learn more about what's going on because next time the data may well matter. Mark -- Mark Rogers // More Solutions Ltd (Peterborough Office) // 0844 251 1450 Registered in England (0456 0902) @ 13 Clarke Rd, Milton Keynes, MK1 1LG

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Re: [ALUG] Exit Script if sudo password not entered
by Ewan Slater 12 Jun '13

12 Jun '13

Hi Steve, What's wrong with kicking the script off with sudo? For example: ewan@bluebox:~$ cat dist-upgrade.sh #!/bin/bash sudo apt-get update sudo apt-get dist-upgrade Bad typing: ewan@bluebox:~$ sudo ./dist-upgrade.sh [sudo] password for ewan: Sorry, try again. [sudo] password for ewan: Sorry, try again. [sudo] password for ewan: Sorry, try again. sudo: 3 incorrect password attempts ewan@bluebox:~$ Good typing: ewan@bluebox:~$ sudo ./dist-upgrade.sh [sudo] password for ewan: Hit http://extras.ubuntu.com quantal Release.gpg Hit http://ppa.launchpad.net quantal Release.gpg Hit http://security.ubuntu.com quantal-security Release.gpg Hit http://gb.archive.ubuntu.com quantal Release.gpg Hit http://extras.ubuntu.com quantal Release Hit http://ppa.launchpad.net quantal Release.gpg Hit http://gb.archive.ubuntu.com quantal-updates Release.gpg ...<yada-yada/> Cheers, Ewan On 12 June 2013 12:00, <main-request(a)lists.alug.org.uk> wrote: > Send main mailing list submissions to > main(a)lists.alug.org.uk > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.alug.org.uk/mailman/listinfo/main > or, via email, send a message with subject or body 'help' to > main-request(a)lists.alug.org.uk > > You can reach the person managing the list at > main-owner(a)lists.alug.org.uk > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of main digest..." > > > Today's Topics: > > 1. Exit Script if sudo password not entered (steve-ALUG(a)hst.me.uk) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 11 Jun 2013 21:16:34 +0100 > From: steve-ALUG(a)hst.me.uk > To: ALUG <main(a)lists.alug.org.uk> > Subject: [ALUG] Exit Script if sudo password not entered > Message-ID: <51B785A2.20502(a)hst.me.uk> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Hi geniuses! > > I have a few scripts with several commands prefixed by sudo. > I often mistype my password, as it's complex, and, if I mistype it 3 > times, I want the script to exit, rather than continue on to the next > line and ask for the password again. > > Is there a recommended way of doing this? I've googled & thought. > One example I've seen asks for the password via zenity, then passes it > through to a sudo line which does something like sudo cat /dev/nul > >dev/nul and then checks if it failed - if it fails it displays a > message and quits. See: > http://ubuntuforums.org/showthread.php?t=2052976&page=2 > > Another alternative I dreamt up whilst reading another webpage was: > sudo echo || { echo 'Login Failed'; exit; } > > Is there a recommended/preferred/suggested/best way of doing this? > > Cheers > Steve > > > > ------------------------------ > > _______________________________________________ > main(a)lists.alug.org.uk > http://www.anglian.lug.org.uk/ > http://lists.alug.org.uk/mailman/listinfo/main > > > End of main Digest, Vol 96, Issue 15 > ************************************

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Diagnosing USB3 HDD disconnections
by Mark Rogers 12 Jun '13

12 Jun '13

I'm having problems with a USB3 HDD caddy of four disks randomly disappearing from my Ubuntu box. As the fours disks are set up as RAID5 this is a particular nuisance, not least because I recently replaced one of the disks and it is unable to complete resyncing. I think this is a clue; it was stable until it reached ~93% complete but now every time I reassemble the array it gets to a little over 94% before it drops out again, returning to 93.7% on each reassemble. The array isn't being used (in most cases it isn't even mounted). Looking at the logs: http://paste.ubuntu.com/5757858/ .. it starts with: --snip-- Jun 12 09:57:14 FileServer kernel: [ 3973.912073] usb 6-2: USB disconnect, device number 2 Jun 12 09:57:14 FileServer kernel: [ 3973.912079] sd 6:0:0:2: Device offlined - not ready after error recovery Jun 12 09:57:14 FileServer kernel: [ 3973.912099] sd 6:0:0:2: [sdh] Unhandled error code Jun 12 09:57:14 FileServer kernel: [ 3973.912104] sd 6:0:0:2: [sdh] Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK Jun 12 09:57:14 FileServer kernel: [ 3973.912111] sd 6:0:0:2: [sdh] CDB: Read(10): 28 40 de c4 0a 98 00 00 f0 00 --snip-- A couple of seconds later the caddy reconnects on its own, although does not reassemble the array (see link to full logs above). Googling the error has found a number of suggestions that this is a software issue: https://bugs.launchpad.net/ubuntu/+source/hdparm/+bug/515023 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/580983 One suggestion is that this is down to /lib/udev/rules.d/85-hdparm.rule and I've made the tweak suggested to prevent it running on USB-connected drives, but I don't understand what the rule does and as such have no idea whether this is happening, or whether I have correctly disabled it for USB drives). Suggestions? Aside: The caddy also supports eSATA but because it needs to talk to 4 drives over one connection would need multiplier support on the eSATA card, so any suggestions for a suitable card welcomed. -- Mark Rogers // More Solutions Ltd (Peterborough Office) // 0844 251 1450 Registered in England (0456 0902) @ 13 Clarke Rd, Milton Keynes, MK1 1LG

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Exit Script if sudo password not entered
by steve-ALUG＠hst.me.uk 11 Jun '13

11 Jun '13

Hi geniuses! I have a few scripts with several commands prefixed by sudo. I often mistype my password, as it's complex, and, if I mistype it 3 times, I want the script to exit, rather than continue on to the next line and ask for the password again. Is there a recommended way of doing this? I've googled & thought. One example I've seen asks for the password via zenity, then passes it through to a sudo line which does something like sudo cat /dev/nul >dev/nul and then checks if it failed - if it fails it displays a message and quits. See: http://ubuntuforums.org/showthread.php?t=2052976&page=2 Another alternative I dreamt up whilst reading another webpage was: sudo echo || { echo 'Login Failed'; exit; } Is there a recommended/preferred/suggested/best way of doing this? Cheers Steve

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[ALUG Announce] ALUG Norwich Pub Meet Thursday 13th June
by Viperfang 10 Jun '13

10 Jun '13

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, 13th June 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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Why are some of my ports appearing in a port scan?
by steve-alug＠hst.me.uk 10 Jun '13

10 Jun '13

Hi folks. I'm confused. Every now and again, I use Shields UP! at grc.com to check that there's unexpectedly open ports on my system. I checked last night and I found 2 open ports, 5 closed ports and all the rest were "stealth" ports. The 2 open ports I was expecting. Stealth ports mean simply that they don't reply in any shape or form to the outside world. I expect, and usually get, all my ports except for the two open ones to appear as "stealthy". I don't understand why I'm now getting 5 closed ports showing up. I have a cable modem that's configured to do NAT for me. It has 3 port forwarding rules, each for single tcp ports. (One of these rules is outside the range usually scanned for by SheildsUp, that's why it's not included in the count of open ports) I don't forward any port ranges. I don't have a DMZ. UPnP is disabled. The ports that are appearing as closed are: 135, 137, 138, 139, 445 I turned off my server's smbd service and rescanned, and I got 135, 137, 138, 445 i.e. port 139 disappeared. So it does seem that services running on the server directly affect ports that are being shown as closed on the router, despite there being no port forwarding rule for them to get past the router onto the server. 135 DCOM Service Control Manager 137 NetBIOS Name Service 138 NETBIOS Datagram Service 139 NETBIOS Session Service 445 Microsoft Directory Services I've just used NetScan on my mobile, (whilst not connected to wifi), and scanning my public IP address I got two expected ports open, and also 80 HTTP 110 POP 143 Internet Message Access I tried with a different mobile app (Port Scan) and I got 1 of the expected ports listed as open, and 80 HTTP 110 POP 143 Internet Message Access 8080 Alternate HTTP I tried with an on-line port scanner, http://nmap.online-domain-tools.com/, and I got only the two expected ports open. I've just tried rerunning GRC's Shields up and now it reports the two expected open ports and also just 137 and 138 as closed. I'm rather confused as to what's going on. Anyone got any ideas? Regards Steve

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Can someone check this site?
by Ted.Harding＠wlandres.net 09 Jun '13

09 Jun '13

Greetings all! I am having trouble connecting to http://oald8.oxfordlearnersdictionaries.com which just hangs indefinitely for me. A traceroute traceroute oald8.oxfordlearnersdictionaries.com proceeds reasonably rapidly down to step 11, which is where it hangs: 10 * 178.236.0.58 (178.236.0.58) 59.452 ms 178.236.3.129 (178.236.3.129) 64.219 ms 11 ec2-79-125-0-77.eu-west-1.compute.amazonaws.com (79.125.0.77) 57.412 ms ec2-79-125-0-73.eu-west-1.compute.amazonaws.com (79.125.0.73) 68.999 ms ec2-79-125-0-5.eu-west-1.compute.amazonaws.com (79.125.0.5) 57.819 ms 12 * * * This may be a problem to do with routing via my ISP's DNS lookups. The ISP in question is zen.co.uk. The server 178.236.0.58 at the preceding step (10) is (from whois): inetnum: 178.236.0.0 - 178.236.7.255 netname: IE-AMAZON descr: Amazon Data Services Ireland Any comments? With thanks, Ted. ------------------------------------------------- E-Mail: (Ted Harding) <Ted.Harding(a)wlandres.net> Date: 09-Jun-2013 Time: 13:26:17 This message was sent by XFMail -------------------------------------------------

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