sabi notesNotes mostly about Linux and computer topicssabico computinghttp://www.sabi.co.uk/Copyright 2021 Peter G.http://www.sabi.co.uk/2023-01-17T20:05:00ZAccount and identity, PulseAudio, etc.2020-03-19T19:30:00Z2020-03-19T19:30:00Zhttp://www.sabi.co.uk/blog/210319PulseAudio confuses user numbers and account
names, making it harder to have multiple account names per user
numbers, but there is a workaround.Booting with GRUB2 from EFI, some details2020-08-10T22:30:00Z2020-08-10T22:30:00Zhttp://www.sabi.co.uk/blog/200810Booting from EFI using GRUB2 involves several
steps, some of which, at least under Ubuntu, are not so obvious.Two factors, things you have, things you know2020-11-07T14:10:00Z2020-11-07T14:10:00Zhttp://www.sabi.co.uk/blog/201107Two factor authentication can be done in
different ways, as long as it is recognized that the usual
description of factor types is somewhat misleading, in particular
for biometrics.Multiple passwords per UNIX account2020-11-08T12:00:00Z2020-11-08T12:00:00Zhttp://www.sabi.co.uk/blog/201108it is possible in the default UNIX/Linux to
have multiple user names per user number, but not multiple passwords
per user name, which prevents some useful configurations.Impressions of a Lenovo E495 laptop2020-12-30T11:10:00Z2020-12-30T11:10:00Zhttp://www.sabi.co.uk/blog/201230The ThinkPad E495 is excellent value for money
with good performance, great expandability, the only non-trivial
issue being a battery with limited capacity.Short proper names for devices and media2021-05-03T20:20:00Z2021-05-03T20:20:01Zhttp://www.sabi.co.uk/blog/210503With some simple configuration it is possible
and desirable to give proper names to specific media and devices.Updated CSS styles for ATOM and RSS feeds2021-05-23T13:30:00Z2021-05-23T13:30:00Zhttp://www.sabi.co.uk/blog/210523I have updated and improved my CSS styles to
render directly in a web browser ATOM and RSS feed files.A really nice typeface2021-06-12T16:50:00Z2021-06-12T16:50:00Zhttp://www.sabi.co.uk/blog/210612Over the years I have become a fan of the
Ubuntu typeface, which is highly legible and compact, and I prefer
it even to DejaVu.Identifiable or self-identified targets2021-06-23T18:10:00Z2021-06-23T18:10:00Zhttp://www.sabi.co.uk/blog/210623By using conveniences like online ordering
it is much easier to be targeted by hostile operations.Much slower battery capacity decrease2021-07-02T14:10:00Z2021-07-02T14:10:00Zhttp://www.sabi.co.uk/blog/210702After 6 months the battery of a new laptop had
already lost 14% of its capacity. Setting a maximum charge threshold
has dramatically slowed that down.A couple details about authentication tokens2021-07-04T21:50:00Z2021-07-04T21:50:00Zhttp://www.sabi.co.uk/blog/210704Usuall three distinct second authentication
factors should be registered with account. Also they are effectively
unique identifiers, so using one for multiple accounts will mark
them as belonging to the same entity, which may or may not
matter.NFS and filesystem instances with multiple roots2021-08-04T22:30:00Z2021-08-04T22:30:00Zhttp://www.sabi.co.uk/blog/210804A debate among Linux kernel developers about
NFS and filesystem instances with multiple roots has one side
arguing that there should be only one root per filesystem instance,
but this is both a misunderstanding of UNIX filesystem semantics
and unnecessary.Trends in computing in the past 20 years2022-01-07T20:40:00Z2022-01-07T20:40:00Zhttp://www.sabi.co.uk/blog/220107A summary of some major and minor trends in computing.Changing DPI in X-Windows, 2022 edition2022-03-05T18:20:00Z2022-03-05T18:20:00Zhttp://www.sabi.co.uk/blog/220305A script to change DPI reported or rendered by
X Windows or major GUI libraries.Standard ratio for storage2022-07-10T11:40:00Z2022-07-10T11:40:00Zhttp://www.sabi.co.uk/blog/220710For general purpose storage size, IOPS and
transfer rate should increase together in the same proportion.A very odd behaviour of 'find'2023-01-17T18:40:00Z2023-01-17T18:40:00Zhttp://www.sabi.co.uk/blog/230117The find option -size has a
very odd with rounding up, and can only test for less-than a given
size in a special case.