main September 2014

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25 participants
31 discussions

Raspberry Pi hwclock
by Mark Rogers 15 Sep '14

15 Sep '14

Anyone here added a real time clock to the Pi? It's pretty trivial in principle but "The Internet" seems to be littered with various ways to configure the Pi to use it, most of which include adding it to /etc/rc.local rather than (for example) /etc/init.d/hwclock.sh. My objective is to have a solution that (a) requires minimal changes to a stock Raspbian (ie the fewer files to add/modify the better), (b) will detect whether an RTC has been added and roll back to using the fake hwclock concept otherwise, (c) use NTP to maintain the clock (including writing to hwclock) when an Internet connection is available and (d) do all this as early into the boot process as possible so minimal services start up with an inaccurate clock. All of that sounds like a fairly desirable standard but most solutions I've found seem to fall short of at least part, and frequently most, of that. -- 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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How to find IPs on a wireless network?
by Chris Green 15 Sep '14

15 Sep '14

If I have a wired connection to my LAN I can use 'arp-scan -l' to find the IP addresses of other systems on the LAN. However arp-scan only works if *I* have a hard-wired connection. How can one find IP addresses on a LAN when connected by WiFi? -- Chris Green

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Re: [ALUG] How to find IPs on a wireless network?
by Chris Green 15 Sep '14

15 Sep '14

On Sat, Sep 13, 2014 at 07:12:29PM +0100, Laurie Brown wrote: > On 13 September 2014 19:09:17 BST, Chris Green <cl(a)isbd.net> wrote: > > If I have a wired connection to my LAN I can use 'arp-scan -l' to find > the IP addresses of other systems on the LAN. However arp-scan only > works if *I* have a hard-wired connection. > > How can one find IP addresses on a LAN when connected by WiFi? > > Try an Android device running fring... > Not a lot of help when I'm sitting here on a boat in France with two Beaglebone Black systems, an IBM Lenovo laptop, a Siemens Gigaset VOIP phone, an internet radio, but nothing running Android. -- Chris Green

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Broadband puzzle
by Bev Nicolson 11 Sep '14

11 Sep '14

Me again. I hope this is on topic. I like to download a few podcasts from time to time from the BBC and audioboo but recently it's been taking roughly twice as long for them to be saved. It also looks as though it's trying to do two at a time though only one remains on my desktop at the end. Any ideas? (Firefox 26.0) (It's fine for using iPlayer, though.) Bev

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nologin warning - any ideas what causes it?
by Chris Green 09 Sep '14

09 Sep '14

I keep getting the following in my logwatch output:- --------------------- Connections (secure-log) Begin ------------------------ **Unmatched Entries** nologin: Attempted login by UNKNOWN on UNKNOWN: 1 Time(s) Does anyone have any idea what might be causing it? It's separate from the sshd report so isn't an ssh attempt from 'outside'. ... and here's the /var/log record of it:- auth.log:Sep 8 08:20:04 chris nologin: Attempted login by UNKNOWN on UNKNOWN auth.log:Sep 9 08:27:00 chris nologin: Attempted login by UNKNOWN on UNKNOWN auth.log.1:Sep 2 08:05:26 chris nologin: Attempted login by UNKNOWN on UNKNOWN auth.log.1:Sep 3 08:31:55 chris nologin: Attempted login by UNKNOWN on UNKNOWN auth.log.1:Sep 4 08:26:50 chris nologin: Attempted login by UNKNOWN on UNKNOWN auth.log.1:Sep 5 08:21:08 chris nologin: Attempted login by UNKNOWN on UNKNOWN auth.log.1:Sep 6 08:24:48 chris nologin: Attempted login by UNKNOWN on UNKNOWN auth.log.1:Sep 7 08:23:18 chris nologin: Attempted login by UNKNOWN on UNKNOWN So it's happening some time after eight every morning. ... and further, here's the context from auth.log :- Sep 8 08:20:01 chris CRON[16693]: pam_unix(cron:session): session opened for user chris by (uid=0) Sep 8 08:20:02 chris CRON[16693]: pam_unix(cron:session): session closed for user chris Sep 8 08:20:03 chris su[16743]: Successful su for news by root Sep 8 08:20:03 chris su[16743]: + ??? root:news Sep 8 08:20:03 chris su[16743]: pam_unix(su:session): session opened for user news by (uid=0) Sep 8 08:20:03 chris systemd-logind[1106]: Removed session c6. Sep 8 08:20:03 chris systemd-logind[1106]: New session c7 of user news. Sep 8 08:20:04 chris nologin: Attempted login by UNKNOWN on UNKNOWN Sep 8 08:20:04 chris su[16743]: pam_unix(su:session): session closed for user news Sep 8 08:20:04 chris su[16800]: Successful su for nobody by root Sep 8 08:20:04 chris su[16800]: + ??? root:nobody Sep 8 08:20:04 chris su[16800]: pam_unix(su:session): session opened for user nobody by (uid=0) Sep 8 08:20:04 chris systemd-logind[1106]: Removed session c7. Sep 8 08:20:04 chris systemd-logind[1106]: New session c8 of user nobody. Sep 8 08:20:04 chris su[16800]: pam_unix(su:session): session closed for user nobody Sep 8 08:20:04 chris su[16813]: Successful su for nobody by root Sep 8 08:20:04 chris su[16813]: + ??? root:nobody Sep 8 08:20:04 chris su[16813]: pam_unix(su:session): session opened for user nobody by (uid=0) Sep 8 08:20:04 chris systemd-logind[1106]: Removed session c8. Sep 8 08:20:04 chris systemd-logind[1106]: New session c9 of user nobody. Sep 8 08:20:04 chris su[16813]: pam_unix(su:session): session closed for user nobody Sep 8 08:20:04 chris su[16834]: Successful su for nobody by root Sep 8 08:20:04 chris su[16834]: + ??? root:nobody Sep 8 08:20:04 chris su[16834]: pam_unix(su:session): session opened for user nobody by (uid=0) Sep 8 08:20:04 chris systemd-logind[1106]: Removed session c9. Sep 8 08:20:04 chris systemd-logind[1106]: New session c10 of user nobody. Sep 8 08:25:01 chris CRON[16935]: pam_unix(cron:session): session opened for user chris by (uid=0) Sep 8 08:30:34 chris CRON[16935]: pam_unix(cron:session): session closed for user chris Sep 8 08:31:39 chris su[16834]: pam_unix(su:session): session closed for user nobody -- Chris Green

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Disabling BEL on tab auto-complete
by Mark Rogers 08 Sep '14

08 Sep '14

I like to have my PC respond to BEL characters in the terminal, eg to report servers that I'm SSH'd into shutting down when I'm not looking at them. But doing this and retaining the tab auto-complete BEL sound means my PC is constantly making bell sounds. Putting set bell-style none in /etc/inputrc fixes this, except I need to put it into each server I ever SSH into, which is neither practical or desirable (as it affects other users of those servers). Any suggestions? I suspect that I'm going to be stuck as I need my local PC to recognise that the BEL it received came from another server's auto-complete, as opposed to something on another server that I care about. But maybe someone here has an intelligent suggestion that I'm too dumb to have thought of? 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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[ALUG Announce] ALUG Norwich Pub Meet Thursday 11th September
by Viperfang 08 Sep '14

08 Sep '14

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, 11th September 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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Apache mod_rewrite
by Barry Samuels 05 Sep '14

05 Sep '14

I have an .htaccess rule so: RewriteCond %{REMOTE_HOST} !beenthere-donethat\.org\.uk$ [NC] RewriteRule ^(folder/colchester1\.html)$ /folder/tempredir.php?page=$1 [R=302,L] The second line has been wrapped by the mailer but it is actually all on one line. That doesn't work. If I ask for http://www.beenthere-donethat.org.uk/folder/colchester1.html then that is what I get. No redirection. What am I doing wrong? I do have other rules in .htaccess which all work normally. What I'm trying to achieve is this - I want, eventually, to redirect all pages to the tempredir page with a link on that page which will then take the vistor to the page they requested originally. I don't want any visitor to be redirected yet until I've finished testing so I've put a page (colchester1.html) in a sub-directory that visitors do not normally visit so that I can test it first. I would test it locally on my home version of the site but, for some reason, redirection on my home computer won't work at all even though the Apache module is enabled. -- Barry Samuels http://www.beenthere-donethat.org.uk The Unofficial Guide to Great Britain

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Is it safe to abort a duplicate dd reimage?
by Mark Rogers 05 Sep '14

05 Sep '14

So I have dd running in one terminal, copying an image to an SD card, and occasionally run "kill -USR1 <pid>" (where <pid> is the dd process id) in another to prod dd into giving me some status info. Every so often I go back to the second terminal, hit "up"+"enter" to re-run the command, and flick back to the first to check progress. Except on one occasion I hit "up"/"enter" on the first terminal, where it had no effect as dd was already running, so I forgot about it. Of-course when dd finished the terminal then grabbed the up/enter from the keyboard buffer and started to re-image the SD card. Given that I'm writing a duplicate image over the top of the SD card is it "safe" to kill the second dd or is there a risk that the SD card will end up corrupt? It's only a 4GB card so I'm not expecting an answer before it's too late to matter, this is more idle curiosity. Unless it turns out I hit up+enter more times than I thought.... 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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2600 meeting at 18:00 on Friday the 5th September.
by Viperfang 02 Sep '14

02 Sep '14

Quick heads up about this months Norwich 2600 meeting, more info at http://www.norwich2600.co.uk

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