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Dropbox and zfs
by stripes theotoky 28 Oct '18

28 Oct '18

As of November Dropbox are dropping support for Linux file systems other than ext4, as I run zfs this is less than helpful. I am wondering as a temporary measure until I move to Pcloud if it would be possible to format a 64GB SD card as ext4, copy the contents of my Dropbox folder to it and then mount it at /home/<username>/Dropbox. Assuming this works it would leave the system drive as zfs and Dropbox in its own ext4 flashcard. Are there better ways to do this and if so how? What will happen with the zfs snapshots that the box takes every minute? What is the life expectancy of an SD card used like this? Thanks in advance Stripes -- Stripes Theotoky -37 .713869 145.050562

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Symmetric Key Management and Distribution
by Usman Saeed 28 Oct '18

28 Oct '18

Hi, I am working on a project involving distributed radio nodes connected over a wireless network. We are using symmetric key cryptography for ciphering (AES-256). The radio nodes are running Linux on a 250MHz processor. I need a solution to manage the symmetric keys in this network of nodes, written in C/C++. The solution should be able to manage the life cycle of the keys. It should be able to auto-generate a new key (upon expiry or when manually instructed by the user) and securely disseminate it in the network and archive the old key after activation of the new key. I have looked at Key Management Interoperability Protocol (KMIP). It provides all of these features but sadly there is no open-source implementation available in C. Does anyone know a solution for symmetric key management that can provide these features and implemented in the open-source domain? Thanks, Usman

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noobish help with Virtualisation (virtual box)
by h 23 Oct '18

23 Oct '18

I am a hobbyist, running a desktop, latest version, open-suse (15.0) system. I have recently changed to an AMD processor having used intel for a long time. I generally format and do a clean install on /, but have a /home partition which has been around for many years and may contain entries related to the intel processor rather than the amd one. I am trying to install and run virtual box. On starting a virtual machine I get a message: AMD-V is disabled in the BIOS (or by the host OS) (VERR_SVM_DISABLED). My BIOS says that "Secure Virtual Machine" is enabled. cat cpuinfo |grep svm shows that svm is on each core. dmidecode does NOT list the svm flag Further system info: Base Board Information Manufacturer: Micro-Star International Co., Ltd. Product Name: B350M PRO-VDH (MS-7A38) Version: 2.0 Processor Information Socket Designation: AM4 Type: Central Processor Family: Zen Manufacturer: Advanced Micro Devices, Inc. Signature: Family 23, Model 1, Stepping 1 Thinking there may be detritus in my /home partition, I have created a new user, but experienced the same problem when starting the virtual machine. Any help on 'how to make virtual box work' would be appreciated, also any info on why cpuinfo says svm is available, but dmidecode does not? I am on and off line at the moment, so may take time to respond. Thank you in advance! H

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strange date issue
by Russell Coker 14 Oct '18

14 Oct '18

I'm running kvm with the -rtc option to try and test a bug related to the start of daylight savings time. Anyway when the VM boots up it gets the acutal time rather than the hwclock time: root@stretch:/etc# hwclock 2018-10-05 10:39:30.993531+1000 root@stretch:/etc# date Sun 14 Oct 13:17:23 AEDT 2018 root@stretch:/etc# cat /etc/systemd/timesyncd.conf # This file is part of systemd. # # systemd is free software; you can redistribute it and/or modify it # under the terms of the GNU Lesser General Public License as published by # the Free Software Foundation; either version 2.1 of the License, or # (at your option) any later version. # # Entries in this file show the compile time defaults. # You can change settings by editing this file. # Defaults can be restored by simply deleting this file. # # See timesyncd.conf(5) for details. [Time] #NTP= #FallbackNTP=0.debian.pool.ntp.org 1.debian.pool.ntp.org 2.debian.pool.ntp.org 3.debian.pool.ntp.org root@stretch:/etc# dpkg -l "*ntp*"|grep ^ii Any ideas for where this might be set? It's a fairly standard Debian/Stretch system with systemd. When I boot with "init=/bin/bash" it has the correct time, so something after going multi-user sets the time via NTP (presumably). -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/

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strange swaks error
by Russell Coker 14 Oct '18

14 Oct '18

Received: from othello.dycom.com.au (othello [203.15.121.80]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: ***(a)coker.com.au) by smtp.sws.net.au (Postfix) with ESMTPSA id 02BDEEC07 for <***(a)coker.com.au>; Sun, 7 Oct 2018 10:31:14 +1100 (AEDT) Date: Sun, 07 Oct 2018 10:31:10 +1000 Above are partial headers from a test message sent by swaks. Seems that the VM receiving mail had the right daylight savings configuration while the system running swaks had the right date but gave the wrong timezone (thus triggering an alert for mail taking an hour to deliver). Any ideas for why swaks would do this? I'm setting up a VM to test swaks as mentioned in my previous message. -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/

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apcupsd / system reboot
by Brian May 14 Oct '18

14 Oct '18

Hello, For a while now I have had this problem that apcupsd doesn't restart properly on system boot - e.g. after power failure. The log appears fine: 2018-10-11 16:43:44 +1100 apcupsd 3.14.14 (31 May 2016) debian startup succeeded I can't remember for sure if the process is running or not. I think it might be, just to confuse matters more. However there is no connection been establed to the device (using SNMP over IP) and "apcaccess" reports dummy values. Furthermore it doesn't do anything on a power failure. If I manually restart it it starts working fine: /etc/init.d/apcupsd restart The logs appear as before: 2018-10-11 18:48:15 +1100 apcupsd exiting, signal 15 2018-10-11 18:48:15 +1100 apcupsd shutdown succeeded 2018-10-11 18:48:15 +1100 apcupsd 3.14.14 (31 May 2016) debian startup succeeded But now "apcaccess" returns correct values. Any ideas? I thought maybe the problem was using the hostname in /etc/apcupsd/apcupsd.conf and putting the lookup in /etc/hosts - should work but was wondering if it was trying to use DNS regardless and DNS is provided by a VM on the box that is still booting. So I now put the IP address in /etc/apcupsd/apcupsd.conf, but it is still failing. Regards -- Brian May <brian(a)linuxpenguins.xyz> https://linuxpenguins.xyz/brian/

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strange 6in4 errors - what does "RX errors" mean?
by Russell Coker 29 Sep '18

29 Sep '18

# ifconfig 6in4 6in4: flags=209<UP,POINTOPOINT,RUNNING,NOARP> mtu 1280 inet6 2a01:4f8:140:71f5:1::ffff prefixlen 128 scopeid 0x0<global> inet6 fe80::a08:1 prefixlen 64 scopeid 0x20<link> inet6 fe80::2e04:7ca5 prefixlen 64 scopeid 0x20<link> inet6 fe80::a0a:a01 prefixlen 64 scopeid 0x20<link> sit txqueuelen 1 (IPv6-in-IPv4) RX packets 563 bytes 69361 (67.7 KiB) RX errors 1200 dropped 0 overruns 0 frame 1200 TX packets 600 bytes 164726 (160.8 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 Above is the result of running ifconfig on my 6in4 device. The problem is the "RX errors" which correspond to ICMP packets missing. The system at the far end of the 6in4 link has monitoring that includes "ping6 www.google.com", until recently that was fine, since upgrading to Debian kernel 4.9.0-7-amd64 #1 SMP Debian 4.9.110-1 problems have started. The problems are somewhat intermittent. I don't expect that the recent Debian kernel upgrade broke this, maybe the reboot exposed some other problem. Does anyone know what "RX errors" means in the context of 6in4 interfaces on Linux? Is there any way of getting the kernel to log every error to dmesg or something? I expect this will be a really easy problem to solve once I know what the errors mean. When the errors happen I run tcpdump on the far end of the 6in4 link and see the packets going out, I run tcpdump on the ethernet device and see the encapsulated packets going in, and when I run tcpdump on the 6in4 device I don't see those packets but I do see packets for local ipv6 addresses. Here's the /etc/network/interfaces section from the server: auto 6in4 iface 6in4 inet6 v4tunnel address 2a01:4f8:140:71f5:1::ffff netmask 128 endpoint 203.15.121.80 ttl 64 up ip link set mtu 1280 dev 6in4 up ip route add 2a01:4f8:140:71f5:1::/96 dev 6in4 Here's the /etc/network/interfaces section from the other end: auto 6in4 iface 6in4 inet6 v4tunnel address 2a01:4f8:140:71f5:1::1 netmask 128 endpoint 46.4.124.165 ttl 64 up ip route add 2a01:4f8:140:71f5:1::ffff dev 6in4 up ip link set mtu 1280 dev 6in4 up ip route add 2000::/3 dev 6in4 Here's the result of running tcpdump on the server, those encapsulated packets look ok and should go to the 6in4 device. # tcpdump -i br0 -n host 203.15.121.80 tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on br0, link-type EN10MB (Ethernet), capture size 262144 bytes 01:18:57.333752 IP 203.15.121.80 > 46.4.124.165: IP6 2a01:4f8:140:71f5:1::4 > 2404:6800:4006:800::2004: ICMP6, echo request, seq 14, length 64 01:18:58.357831 IP 203.15.121.80 > 46.4.124.165: IP6 2a01:4f8:140:71f5:1::4 > 2404:6800:4006:800::2004: ICMP6, echo request, seq 15, length 64 01:18:59.381702 IP 203.15.121.80 > 46.4.124.165: IP6 2a01:4f8:140:71f5:1::4 > 2404:6800:4006:800::2004: ICMP6, echo request, seq 16, length 64 01:19:00.405686 IP 203.15.121.80 > 46.4.124.165: IP6 2a01:4f8:140:71f5:1::4 > 2404:6800:4006:800::2004: ICMP6, echo request, seq 17, length 64 Any ideas? -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/

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Apache + Open Office Headless
by Piers 26 Sep '18

26 Sep '18

Hi there, I have a VM with 16GB RAM and 8 Cores. It's job is to accept a HTTP request using PHP, take the data (documents) and run open office to convert it to plain text and return it. Up until now this process has been fine. It seems that the server hangs as it just gets overloaded. I've just changed the cron jobs from the sending servers to space them apart and also upped max / min spare servers. Previously I have tried other approaches like the JAVA headless and running OO as services and using HA Proxy. They haven't been successful (could have been my implementations). The script loads its own version of OO each time a connection is made. Is there a better way of doing this? Seems like an awfully big VM to falls over/hang all the time. Your help / ideas / rants are appreciated. Thanks Piers

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Appointment reminder app
by Lindsay W 13 Sep '18

13 Sep '18

I am looking for a simply appointment reminder app, I am NOT interested in anything online. As well as normal appointments I would like to be able to put in events that occur on particular day of the month, such as "2nd saturday, Local market". BSD Calendar would do exactly what I want but i cannot get it to print anything. When the command is run it does read the "calendar" file (checked that with ltrace), but never prints anything. Has anybody got BSD calendar to work, what should the data file look like. It would not be to difficult to write a simple app to do this but SURELY there must be something out there, hmmmmm a look at the source of BSD Calendar would probably be usefull. Lindsay

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Re: ArgyllCMS, DisplayCal and the X-Rite i1 Studio
by Andrew Greig 06 Sep '18

06 Sep '18

Hi All, If we have any photographers in the list, has anyone been able to use the Display Colorimeter and Photo Spectrometer features of this device under Linux? (Specifically Ubuntu 18.04)? It is an expensive piece of kit, but I need to be able to print with certainty, because printing is so damn expensive. The alternative is to find a way to profile the roll printers used by Office works or other print services. Many thanks Andrew Greig

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