June 2012 - luv-main - example.com

[luv-main] flashing a Samsung Galaxy S
by Russell Coker 18 Oct '12

18 Oct '12

http://wiki.cyanogenmod.com/wiki/Samsung_Galaxy_S:_Full_Update_Guide I've got a Galaxy S that I want to use for Cyanogenmod. I went through the part of the above that starts with "assumes the Samsung Galaxy S already has Android 2.3" while my phone had Android 2.2. The result is that it just flashes on the kernel boot screen. I can still get into download mode so all is not lost (yet). http://www.samfirmware.com/WEBPROTECT-i9000.htm I tried getting other zImage files from the above, I tried the 2011 March copy of Android 2.2 from the "America Australia Samsung I9000 Firmwares" section of the above. http://www.samfirmware.com/apps/blog/show/8512833-android-2-3-5-for-galaxy-… I also tried the 2.3.5 from the above. Neither worked. Any suggestions on what I should try next? The phone came from Optus and was running Android 2.2 when I got it. -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/

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BTRFS conversion
by Russell Coker 04 Jul '12

04 Jul '12

I've got some filesystems that I want to convert to BTRFS. They currently are Ext3/4 on Linux Software RAID-1. My plan is to break the RAID, convert one of the constituent devices with the btrfs-convert program, and then add the other one via "btrfs device add". How do I get the new BTRFS device to use RAID-1 for data and metadata? Avi, from your talk I got the impression that this was already possible but the man page doesn't reveal how. I'm using btrfs-tools version 0.19+20120328-3 and kernel 3.2.0-2-amd64 from Debian/Unstable. Do I need to get a newer version of the kernel or the tools? PS Great talk Avi, it was good that you had more than an hour. Could you give another talk in Dec or Feb? -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/

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Periodic ntp loss of synchronisation problems
by Andrew Worsley 03 Jul '12

03 Jul '12

I am having periodic ntp synchronisation problems. ntp doesn't directly log anything - but I am using nagios3 to track it's synchronisation and I periodically get problems - several times a day. I can't figure out what is causing the loss of synchronisation. Perhaps a burst of ntp packets dropped? But wouldn't ntp log something about this? Any suggestions on logging more info to find the cause or deeper insights into what is going wrong would be appreciated. Andrew Here's the output of commands when things are bad: config(0)# check_ntp_peer -H 127.0.0.1 -w 1.0 -c 2.0 NTP WARNING: Server has the LI_ALARM bit set, Offset 0.210925 secs|offset=0.210925s;1.000000;2.000000; LI_ALARM apparently means not in sync ??? config(1)# ntpq -c rl associd=0 status=c618 leap_alarm, sync_ntp, 1 event, no_sys_peer, version="ntpd 4.2.6p2(a)1.2194-o Sun Oct 17 13:35:13 UTC 2010 (1)", processor="x86_64", system="Linux/2.6.32-5-amd64", leap=11, stratum=3, precision=-23, rootdelay=95.696, rootdisp=263.117, refid=192.189.54.33, reftime=d2bccf2f.4854b34f Sun, Jan 15 2012 15:06:07.282, clock=d2bcd1d6.e9ffea4c Sun, Jan 15 2012 15:17:26.914, peer=16519, tc=10, mintc=3, offset=0.000, frequency=500.000, sys_jitter=35.804, clk_jitter=0.000, clk_wander=91.828 It thinks it's in error by 16s??? config(0)# ntpdc -c kerninfo pll offset: 0 s pll frequency: 500.000 ppm maximum error: 16 s estimated error: 16 s status: 4041 pll unsync mode=fll pll time constant: 10 precision: 1e-06 s frequency tolerance: 500 ppm ntptime gives the same info config(0)# ntptime ntp_gettime() returns code 5 (ERROR) time d2bcd2be.08d3a000 Sun, Jan 15 2012 15:21:18.034, (.034479), maximum error 16000000 us, estimated error 16000000 us ntp_adjtime() returns code 5 (ERROR) modes 0x0 (), offset 0.000 us, frequency 500.000 ppm, interval 1 s, maximum error 16000000 us, estimated error 16000000 us, status 0x4041 (PLL,UNSYNC,MODE), time constant 10, precision 1.000 us, tolerance 500 ppm, Then mysertiously everything is okay: config(0)# ntpdc -c kerninfo pll offset: 0.00998 s pll frequency: 500.000 ppm maximum error: 1.6291 s estimated error: 0.004771 s status: 0001 pll pll time constant: 10 precision: 1e-06 s frequency tolerance: 500 ppm My leap becomes none (no leap_alarm) and things are ok? config(0)# ntpq -c rl associd=0 status=0618 leap_none, sync_ntp, 1 event, no_sys_peer, version="ntpd 4.2.6p2(a)1.2194-o Sun Oct 17 13:35:13 UTC 2010 (1)", processor="x86_64", system="Linux/2.6.32-5-amd64", leap=00, stratum=3, precision=-23, rootdelay=95.272, rootdisp=983.007, refid=192.189.54.33, reftime=d2bcd33b.bbc10580 Sun, Jan 15 2012 15:23:23.733, clock=d2bcd852.ec6be1b9 Sun, Jan 15 2012 15:45:06.923, peer=16519, tc=10, mintc=3, offset=13.497, frequency=500.000, sys_jitter=7.251, clk_jitter=4.772, clk_wander=151.809

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Debian repository software
by Toby Corkindale 03 Jul '12

03 Jul '12

Hi, I wonder if I can get some advice from the list? I want to run a little Debian repository -- but I have a requirement which seems to be missing from the software tried so far. I want the repository to maintain multiple versions of the same package. ie. So I could do this: dput my-package_1.00-1_all.deb dput my-package_1.11-1_all.deb dput my-package_2.00-1_all.deb And then on a machine using my repo, be able to say something like: aptitude install my-package (> 1.10 & < 1.99) while on another machine, say: aptitude install my-package (>= 2.00) So far, repo management software I've seen will purge the older version out when you upload a new one. Any thoughts? Thanks, Toby

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apache2 and ssl accelerator
by James Harper 29 Jun '12

29 Jun '12

I have squid functioning nicely as a https accelerator for tomcat6 and IIS7 (Outlook web access and terminal server gateway), and now I want to publish a mantis server that way too. The problem is that squid takes the https request and proxies it as a http request to the server running mantis. apache2 gets the http request and so any hard links in there are prepended with http, which doesn't work (eg browser tries to get css via http which isn't reachable). Squid is adding the front-end-https header to the requests which should tell apache that the front end request was https:// but it doesn't seem to be working. What do I need to do to make apache understand that the user request was https not http? Thanks James

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ipsec.
by Andrew Spiers 29 Jun '12

29 Jun '12

Thought I might play around with IPSEC. It seems there are a few different linux implementations, Strongswan, openswan, racoon (which I think is based on a project called KAME) and I think you can do it with Shorewall. Have I missed any notable implementations? Which is your favourite, and why?

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partx in modern kernels
by James Harper 23 Jun '12

23 Jun '12

I get the following when I try and partx an lvm volume containing a Windows 7 machine: root@hostname:~# partx /dev/vg-fast/virt-capture1-0 # 1: 2048-125827071 (125825024 sectors, 64422 MB) The above is the correct dimensions of the partition. root@hostname:~# partx -a /dev/vg-fast/virt-capture1-0 partx: /dev/vg-fast/virt-capture1-0: error adding partition 1 The interesting bits from an strace: open("/sys/dev/block/254:26", O_RDONLY) = 3 newfstatat(3, "partition", 0x7ffff554a660, 0) = -1 ENOENT (No such file or directory) openat(3, "dm/uuid", O_RDONLY) = 4 fcntl(4, F_GETFL) = 0x8000 (flags O_RDONLY|O_LARGEFILE) fstat(4, {st_mode=S_IFREG|0444, st_size=4096, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f83f10b0000 lseek(4, 0, SEEK_CUR) = 0 read(4, "LVM-QUSNncQ5s6iHG1gMD7g9dNFQGV6Y"..., 4096) = 69 close(4) = 0 munmap(0x7f83f10b0000, 4096) = 0 close(3) = 0 ... stat("/dev/vg-fast/virt-capture1-0", {st_mode=S_IFBLK|S_ISVTX|0660, st_rdev=makedev(254, 26), ...}) = 0 open("/dev/vg-fast/virt-capture1-0", O_RDONLY) = 3 fadvise64(3, 0, 0, POSIX_FADV_RANDOM) = 0 fstat(3, {st_mode=S_IFBLK|S_ISVTX|0660, st_rdev=makedev(254, 26), ...}) = 0 uname({sys="Linux", node="keechvs3", ...}) = 0 ioctl(3, BLKGETSIZE64, 0x12ef0e0) = 0 ioctl(3, CDROM_GET_CAPABILITY, 0) = -1 ENOTTY (Inappropriate ioctl for device) lseek(3, 0, SEEK_SET) = 0 read(3, "3\300\216\320\274\0|\216\300\216\330\276\0|\277\0\6\271\0\2\374\363\244Ph\34\6\313\373\271\4\0"..., 1024) = 1024 ioctl(3, BLKSSZGET, 0x12ef0f8) = 0 ioctl(3, BLKPG, 0x7ffff554b880) = -1 EINVAL (Invalid argument) ... close(3) Any suggestions? Kernel is debian 3.2.0-2-amd64 Thanks James

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Re: [luv-announce] Speakers, please?
by Russell Coker 22 Jun '12

22 Jun '12

On Thu, 21 Jun 2012, lev(a)levlafayette.com wrote: > This is a general pitch to all members of LUV on whether they would > consider stepping up to the speaker's plate for the community. So what happened to all the people who answered that survey about speaking at a LUV meeting? Maybe we should have such polls ask people for their email address... -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/

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Linux Journal digital edition and wget
by Mark Trickett 20 Jun '12

20 Jun '12

Hello All, As are others, I am a Linux Journal subscriber, and they have discontinued the print edition, providing a PDF from the web instead. I get a monthly email, with a link, and clicking on that brings up a page in FireFox, and an auto start download with the FireFox download manager. Sometimes it "completes" short of the whole file, useless, but usually I can get with multiple tries. This month, no such luck. I have tried copying and pasting the link into wget, but without success, there is a stub document, and wget then exits instead of listening for the following file. I have looked at the wget man page, and there is a provision for getting, and saving, session cookies, as well as ways to do login credentials, but I am not certain of quite what is required. I do have login credentials available, but appear not needed. The URL is, without all the final string as I am required to not pass that on, but of 6 alphanumeric characters, a hyphen, then fourteen characters, another hyphen, then ten characters. There is a shortened version follows, which should fail in a browser, but provide the first portion for reference. http://linuxjournalservices.com/portal/wts/cgmciy- I am wondering whether I need recursion, or some other option to get wget to wait for the download to start on the opened connection. Regards, Mark Trickett

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RAID (md) bug in some 3.2.x and 3.3.x kernels
by Chris Samuel 19 Jun '12

19 Jun '12

Hi all, For those who've not yet seen this yet, Neil Brown has reported a nasty bug in the MD software RAID driver introduced into 3.4-rc1 and fixed in 3.4-rc5, but unfortunately the bad commit was copied to the stable@ address and so got backported into the 3.2.14 release (and fixed in 3.2.17) and the 3.3.1 release (fixed in 3.3.4). http://neil.brown.name/blog/20120615073245 # The bug will only fire if, while the machine is shutting down, # and array is partially assembled but not yet started. If the # array is started and running it is safe ... as long as it stays # that way. # # The typical way that an array can get into this "partially # assembled by not started" start is for "mdadm --incremental" # to have been run on some, but not all, of the devices in the # array. If it had been run on all it would have started the # array, but until then it is assembled but not started and this # is the dangerous situation. It won't toast your data, but will toast the MD metadata and break your array. Your best way to recover is to have an already existing copy of the output of "mdadm -Evvvvs" for your arrays. See Neils blog for more info. cheers, Chris -- Chris Samuel : http://www.csamuel.org/ : Melbourne, VIC

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