main June 2020

main@lists.alug.org.uk

6 participants
7 discussions

Start a nNew thread

2600 meeting at 18:00 on Friday the 3rd July.
by Viperfang 30 Jun '20

30 Jun '20

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

1 0

ePub reader, is there really not one in Ubuntu/Debian?
by Chris Green 27 Jun '20

27 Jun '20

I want to read (well, 'use', it's a programming manual) that's in ePub format. There seems to be no default, or even available, ePub reader in Ubuntu. There are dozens of programs for creating ePub format but nothing for simply reading it. Am I missing something obvious somewhere? -- Chris Green

2 2

Ensuring that a systemd unit starts *before* any networking
by Mark Rogers 25 Jun '20

25 Jun '20

Not sure if there are any systemd experts here, but I'll ask on the off-chance; I've already posted on Stack Overflow [1] if anyone knows the answer and wants credit for answering it there. How do I ensure a systemd unit runs to completion before any network tasks start? It sounds like a simple task but I've been banging my head on this for ages and every time I think it's working it turns out I was just lucky with timing. I have some code which generates dhcpcd.conf and wpa_supplicant.conf from settings in a database so obviously that needs to happen before any of those network tools start. But whatever magic I try in my unit configuration seems to have no impact on the start order of the unit. My current attempt is: [Unit] Description=Config generation from DB Before=networking.service [Service] Type=oneshot ExecStart=/home/mark/bin/db2config.py [Install] RequiredBy=network.target Any ideas? [1] https://stackoverflow.com/questions/62574482/ensuring-that-a-systemd-unit-s… -- Mark Rogers // More Solutions Ltd (Peterborough Office) // 0844 251 1450 Registered in England (0456 0902) 21 Drakes Mews, Milton Keynes, MK8 0ER

1 0

Mint mirrors
by Bev Nicolson 14 Jun '20

14 Jun '20

Anyone else having issues refreshing the mirrors? (WiFi is fine generally so I don't think it's problem at my end.) This isn't a one-off. I get this message: <<Failed to fetch http://www.mirrorservice.org/sites/packages.linuxmint.com/packages/dists/te… 503 Service Unavailable [IP: 91.230.243.15 80]Some index files failed to download. They have been ignored, or old ones used instead.>> Bev

2 2

dhcpcd fallback
by Mark Rogers 04 Jun '20

04 Jun '20

I have the following in /etc/dhcpcd.conf (on a Pi), which (as I understand it) should seek an IP via DHCP but fallback to 192.168.60.100 if none is offered. My problem is that more often than not I end up with the fallback IP address rather than one from DHCP, despite the Pi being on a network with a DHCP server. (The connection to DHCP is a bit convoluted: Pi cabled to Wifi access point, which is on my home wifi network, which gives it access to my home router's DHCP server.) Any suggestions how I can diagnose this? I'm not sure if the complex connection to DHCP is the issue or not (and it does sometimes work so I don't think it's a config issue) but I'm not sure where to start looking and I'd like this to work over unreliable links if possible. If I comment out the fallback line I get a reliable DHCP address. # fallback to static profile on eth0 profile static_eth0 static ip_address=192.168.60.100/24 static routers=192.168.60.250 static domain_name_servers=192.168.60.250 interface eth0 fallback static_eth0 -- Mark Rogers // More Solutions Ltd (Peterborough Office) // 0844 251 1450 Registered in England (0456 0902) 21 Drakes Mews, Milton Keynes, MK8 0ER

1 2

2600 meeting at 18:00 on Friday the 5th June.
by Viperfang 02 Jun '20

02 Jun '20

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

1 0

Updating Ubuntu from 16.04 to 18.04 (xenial to bionic)
by Christopher Dawkins 01 Jun '20

01 Jun '20

I tried this first a year or two ago and came across the same problem - a problem with the rfkill package, one for which I have no use anyway. Last Friday I had three desktop Ubuntu 16.04 systems, set up at three different times. On Saturday one updated smoothly to 18.04 using the proper 'sudo do-release-upgrade' method. Both the others failed with the nasty 'Hash Sum mismatch' error on rfkill. As one did last year, when I learnt that it was a repository sync problem that would clear up later. I have googled widely and implemented (I think) every solution. I have cleaned, updated, upgraded, done dist-upgrade, autoremoved, wiped /var/lib/apt/lists and /var/cache/apt/archives, and made sure both Acquire-by-hash and Acquire::CompressionTypes::Order::=gz are operating. I have downloaded (with wget) both the 4945 bytes of the xenial version and the 5005 bytes of the bionic version and installed them at separate times in /var/cache/apt/archives before trying the update again. Every time, it barfs on rfkill with a 'Hash Sum mismatch'. I find in my notes three other reported sizes for rfkill: 5045, 8530, 8580 and 8612 bytes. Since I don't need rfkill, can anyone suggest any way to get over this? Maybe the problem is that I purged it half way through a long weekend of wrestling. It refuses to reinstall with the following message. ==================================================================================== Need to get 8,530 B of archives. After this operation, 33.8 kB of additional disk space will be used. Get:1 http://gb.archive.ubuntu.com/ubuntu xenial-updates/main amd64 rfkill amd64 0.5-1ubuntu3.1 [8,530 B] Err:1 http://gb.archive.ubuntu.com/ubuntu xenial-updates/main amd64 rfkill amd64 0.5-1ubuntu3.1 Hash Sum mismatch Fetched 4,945 B in 0s (238 kB/s) E: Failed to fetch http://gb.archive.ubuntu.com/ubuntu/pool/main/r/rfkill/rfkill_0.5-1ubuntu3.… Hash Sum mismatch E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing? =================================================================================== and I note that it fetched only around half of what it needed, but it seems to always do this. When I try again with apt --fix-missing install rfkill I get the same with a final error: E: Internal Error, ordering was unable to handle the media swap The usual error message involves two GETs: ==================================================================================== Get:1 http://gb.archive.ubuntu.com/ubuntu bionic-updates/main amd64 rfkill amd64 2.31.1-0.4ubuntu3.6 [24.8 kB] Err http://gb.archive.ubuntu.com/ubuntu bionic-updates/main amd64 rfkill amd64 2.31.1-0.4ubuntu3.6 Hash Sum mismatch Fetched 4,945 B in 0s (0 B/s) Get:1 http://gb.archive.ubuntu.com/ubuntu bionic-updates/main amd64 rfkill amd64 2.31.1-0.4ubuntu3.6 [24.8 kB] Err http://gb.archive.ubuntu.com/ubuntu bionic-updates/main amd64 rfkill amd64 2.31.1-0.4ubuntu3.6 Hash Sum mismatch Fetched 5,005 B in 0s (0 B/s) Could not download the upgrades ====================================================================================== though at times there is a second occurrence of the second four-line message. -- Christopher Dawkins Garnetts Corner, Jollyboys Lane North, Felsted, Dunmow, Essex CM6 3DU 07816 821659

1 0

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

1997

main June 2020