- luv-main - luv.asn.au

Re: Reworking filenames
by Craig Sanders 06 May '17

06 May '17

On Fri, May 05, 2017 at 08:16:52PM +1000, Mark Trickett wrote: > > Most rename scripts you'll write are just one or more > > 's/search/replace/' one-liner statements, but they can be a quite > > complicated perl script if required. > > I need to learn perl, but will do a lot better around other people, most renames won't need much perl, just regular expression search & replace. > > $ rename --version > > /usr/bin/rename using File::Rename version 0.20 > > > > or check 'man rename' - if it mentions perl, it's good. > > That reported perl, but the --version option is not supported on the > rename on this install. that sounds like the default rename included in the perl package. it should work but has some problems that are fixed in later versions. the rename package is only 12 KB in size, so won't use much bandwidth to download. it has no dependencies other than perl, either so I could mail it to you if you want. or download direct from your nearest debian mirror without bothering with 'apt-get' (updating the package lists will be tens of megabytes). install with 'dpkg -i' (as root, of course). Package: rename Version: 0.20-4 Installed-Size: 36 Maintainer: Debian Perl Group <pkg-perl-maintainers(a)lists.alioth.debian.org> Architecture: all Replaces: libfile-rename-perl Provides: libfile-rename-perl Depends: perl Conflicts: libfile-rename-perl Description-en: Perl extension for renaming multiple files This package provides both a perl interface for renaming files (File::Rename) and a command line tool 'rename' which is intended to replace the version currently supplied by the perl package. Description-md5: f25bdadb8b97cbf70a4a78c50ca2e8af Homepage: https://metacpan.org/release/File-Rename Section: perl Priority: optional Filename: pool/main/r/rename/rename_0.20-4_all.deb Size: 12464 MD5sum: 11987300e5cbab887e2b34692665dc3a SHA256: 51ed56802ac8f84b588cc9db117469071e7b434cf8544aab2ef1d66c6686a00f > > but in the meantime, try something like this to start with: > > > > # DD MM YYYY (nnn) > > rename -n 's/(\d\d)(\d\d)(\d{4})\./$3-$2-$1(000)./; > > s/(\d\d)(\d\d)(\d{4})($\d{3}$)\./$3-$2-$1$4./; > > ' *.jpg > > > > the first s/// statement matches and replaces filenames WITHOUT > > the 3-digit sequence (and adds a sequence of "(000)"). The second > > matches filenames WITH them. > > I think I can start to follow what you are doing, and I need to be > careful, In typing emails and the like, I am hitting extra keys the s/// statements above should work with the filenames you listed. and copy-and-paste the rename command into a terminal should also work, no need for error-prone typing. that's part of the reason why I used the '-n' option, so it only does a dry-run and doesn't actually rename anything. or paste it into a text file, insert a first line of '#!/bin/sh', and make it executable with 'chmod +x'. and change *.jpg to "$@" so you can specify the filenames on the command line. like so: #!/bin/bash rename -n 's/(\d\d)(\d\d)(\d{4})\./$3-$2-$1(000)./; s/(\d\d)(\d\d)(\d{4})($\d{3}$)\./$3-$2-$1$4./; ' "$@" get rid of the '-n' when you've tested it and seen that it will work as required. craig -- craig sanders <cas(a)taz.net.au>

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Re: Reworking filenames
by Andrew Pam 05 May '17

05 May '17

On 05/05/17 20:16, Mark Trickett via luv-main wrote: > I was very familiar with the old IBM keyboards, the > ones with a wedge connector and that could have a cable with an AT or > PS/2 connector, but I have yet to find an adaptor from AT/PS/2 to USB > that I can rely on. I have seen a USB mouse with adaptor to PS/2, but > not for a keyboard, yet. They definitely exist; I have both USB keyboard to PS/2 connector and PS/2 keyboard to USB adapters, and have successfully used a AT to PS/2 keyboard adapter stacked with one of the latter. > Having a second keyboard on a laptop would be > "interesting" My Samsung phone supports USB OTG, so in the past I have plugged in a small hub and a mouse and keyboard to use with my phone! The mouse pointer appears as soon as you plug in a mouse. Cheers, Andrew

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Re: Reworking filenames
by Erik Christiansen 05 May '17

05 May '17

On 05.05.17 20:16, Mark Trickett via luv-main wrote: > I need to learn perl, For other tasks, perhaps? > but will do a lot better around other people, which is not so easy > when in a rural area with less population and an excess of Windows and > mac users who have no interest in more than using the bare minimum of > provided utilities. Have you tried Russel's elegantly minimalist solution? Just trying the first action on the command line: $ n="01032017(001).jpg" $ echo $(echo $n|cut -c 5-8)$(echo $n|cut -c 3-4)$(echo $n|cut -c 1-2) gives a very fine: 20170301 The "(001).jpg" is added in the third line. If time is short, and mental energy drained by other demands, then KISS is key, so you can gain a quick success, I figure. (This one isn't a task which needs later upscaling.) Erik

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Old laptops needed
by Russell Coker 04 May '17

04 May '17

A friend will be going to Vietnam soon and has some baggage space for laptops for Vietnamese kids. They don't need to be new, and don't need to be fully working (broken display and keyboard isn't necessarily a problem as long as VGA and USB ports work). They will all be used for Linux. But if you don't know the hardware specs then tell me the Windows version listed on the sticker (IE a Windows 7 laptop is more desirable than a Windows XP laptop). Contact me off-list if you have something to spare that I can collect within 6 days. Thanks. -- Sent from my Nexus 6P with K-9 Mail.

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Podcast: James Turnbull on Declarative Programming with Terraform - given tomorrow's talk
by Rodney Brown 01 May '17

01 May '17

http://www.se-radio.net/2017/04/se-radio-episode-289-james-turnbull-on-decl… SE-Radio Episode 289: James Turnbull on Declarative Programming with Terraform James Turnbull rejoins the show with Robert Blumen <http://www.se-radio.net/team/#Blumen> for a conversation mostly about Terraform, as well as a bit about Puppet. Terraform is a declarative programming tool for automating infrastructure resource creation; it targets resource providers, such as Amazon AWS, Microsoft Azure, Digital Ocean, and other cloud and SAAS back ends. The discussion explores the programming language used by Terraform (TF); what TF does when it runs; why a declarative language is a good fit for infrastructure resource creation; and how infrastructure operation is becoming more like programming, with a build pipeline, testing, and deployment. The episode considers TF’s internals, its similarities and differences with Puppet, and some speculation about whether declarative programming is the future of programming. About SE-Radio Software Engineering Radio is a podcast targeted at the professional software developer. The goal is to be a lasting educational resource, not a newscast. Three to four times per month, we publish a new episode talking to experts from the software engineering world about the full range of topics that matter to professional developers. All SE Radio episodes feature original content; we don’t record conferences or talks given in other venues. SE Radio is managed by the volunteers and staff of IEEE Software, a leading technical magazine for software professionals published by the IEEE Computer Society. All content is licensed under the Creative Commons 2.5 license. SE Radio was founded in January 2006 by Markus Voelter. It joined forces with IEEE Software in February 2012.

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Laptop free to good home
by Andrew Pam 29 Apr '17

29 Apr '17

I'm trying to cut down on the number of computers in my house. Here's the first one I'm offering free to anyone who wants it: Compaq Evo N410c laptop with docking bay and a D-Link DWL-G630 PC-card WiFi adapter 1.2GHz Pentium III-M, 1GB RAM, 63GB HDD, 1024x768 LCD with ATI Radeon Mobility M6 LY chipset Ports: VGA, audio, 2xUSB, IRDA, internal modem, Ethernet, PC-card slot, serial, parallel and composite video out (!) The docking bay has stereo speakers, 2x drive bays with a DVD drive and a 3.5" floppy drive and the following ports: VGA, audio, 2xUSB, Ethernet, PS/2 keyboard and mouse, serial and parallel. I can bring it to the LUV meeting on Tuesday night, or you can pick it up from my office in North Richmond during office hours next week. Cheers, Andrew

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reported nasty bash bug -- arithmetic problem, incorrect return code with ((var++)) when var is 0 before operation
by Andrew McGlashan 29 Apr '17

29 Apr '17

Configuration Information [Automatically generated, do not change]: Machine: x86_64 OS: linux-gnu Compiler: gcc Compilation CFLAGS: -DPROGRAM='bash' -DCONF_HOSTTYPE='x86_64' -DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='x86_64-pc-linux-gnu' -DCONF_VENDOR='pc' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash' -DSHELL -DHAVE_CONFIG_H -I. -I../. -I.././include -I.././lib -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -Wall uname output: Linux andrewm-Satellite-P50-A 4.4.0-72-generic #93-Ubuntu SMP Fri Mar 31 14:07:41 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux Machine Type: x86_64-pc-linux-gnu Bash Version: 4.3 Patch Level: 42 Release Status: release Description: The return code from ((i++)) operation is different when i has an initial value of 0. This problem was discovered when running run a bash script with "set -ue" and having "((i++))" as the last command in a loop. Repeat-By: The following script will quit with an error after the first iteration due to the return code errantly being 1. #!/bin/bash set -eu i=0 for a in a b c do echo "${a}" ((i++)) done NB: If i starts as 1, the script works as expected. Also, using ((i+=1)) works fine, but I prefer the ((i++)) format. Proof outside a loop: $ c=0;((c++));echo $? 1 $ c=1;((c++));echo $? 0 Only the above was reported, but this also yeilds more proof: $ for c in {-3..3};do ((c++));echo $? "${c}";done 0 -2 0 -1 0 0 1 1 0 2 0 3 0 4 Cheers AndrewM

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smaller pavucontrol
by Tim Connors 28 Apr '17

28 Apr '17

Is there a smaller version of pavucontrol that can access all the mixers and give a quick visual indication of current volume levels, but still fit on the screen when you have more than 5 or 6 audio applications open at once? -- Tim Connors

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Connecting to Wi-Fi, alternatives to network manager
by Mark Trickett 25 Apr '17

25 Apr '17

Hello All, Having a Telstra supplied Netgear Mobile modem, nominally a Telstra4GA device, I am not happy with the way that Network Manager connects, or fails, silently. What software and procedures do you use to connect to Wi-Fi networks? I am looking for something I can largely script, but also adapt to coping with connecting to other devices elsewhere now and then. I am also wanting something a little more informative and verbose, I may not initially understand all the returned information, but I can work on that. Regards, Mark Trickett

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SNMP monitoring
by Brian May 25 Apr '17

25 Apr '17

Hello, What is the easiest way of monitor SNMP data from a small number of VMs, servers, routers, switches and UPS? Previously I used zenoss for this. It is good in that I can tell it to monitor a switch, and I automatically get statistics recorded for every port on the switch (without having to configure each port manually). On the downside zenoss seems to be bulky and complicated at times. Or at least my legacy version (3.2.1-0) - I doubt this has changed although I might be mistaken. However I noticed that I am on a legacy version, and the latest version only seems to support RHEL/Centos based systems (my current install is on Debian). So considering that I might need to do a complete reinstall anyway, I thought I might us well check to seem what other options there are. http://wiki.zenoss.org/Install_Zenoss Thanks. -- Brian May <brian(a)linuxpenguins.xyz> https://linuxpenguins.xyz/brian/

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