ccheck
App-perlbrew
ccheck | App-perlbrew | |
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5 | 19 | |
26 | 713 | |
- | - | |
0.0 | 6.9 | |
about 3 years ago | 15 days ago | |
Perl | Perl | |
MIT License | GNU General Public License v3.0 or later |
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ccheck
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Anyone know what causes intermittent corruption of random visual media files across drives and machines?
Grab a friends computer and amass a large batch of good known files, make sure they are of all different file formats. I am pretty sure you will be able to find entire archives of test data in different formats online, to really reproduce this I am going to assume it should be multiple gb in size. Make sure it contains jpg, videos, text files, pdfs, etc. Now write a script or use some tool like this (https://github.com/jwr/ccheck) to basically compute the sha256 checksum of every file in this test package and write it to a file. Take this package of files and copy them to as many media sources as you have access to, CD/DVDs are great, thumb drive, your laptop, a nas with ZFS (and ECC ram) would be amazing, probably throw it up on cloud storage just to be safe. I would then have the same script run as a cron job, maybe on your main machine to basically continuously check that checksums match their original value. As soon as you notice a checksum mismatch you will want to isolate that file and locate the same one across all the other systems and do a deeper inspection. Open it up in a HEX editor and do a bit by bit comparison to see were the corruption occurred and how bad it is. This will start to give you a better picture of what may be going on.
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Show HN: Off-site, encrypted backups for $1/TB/month at 99.999999999% durability
Here's my "me too" — I've been happily using rclone for things like photo archives (together with my small consistency checker to check file hashes for corruption https://github.com/jwr/ccheck). I also use Arq Backup with B2 as the destination. This gives me very reasonable storage costs and backups I can access and test regularly.
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What Happened to Perl 7?
Perl is very well suited for certain tasks (not large software systems, but programs that process data). It is also one of very few languages/ecosystems where you can expect your code to work after >10 years. This is why I sometimes use it, for example my fs consistency checker (https://github.com/jwr/ccheck) was written in Perl specifically because it's a long-term tool and I would like to be able to run it on any system in 15 years.
Compare this long-term approach with the fires in Python or (heaven forbid) Node ecosystems, where things break all the time.
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I Nearly Lost the Lightroom Catalog with All My Photos
This sort of thing scares me. It's why I started running consistency checks on my important archives (like my photo library), which I keep backed up in multiple places. We tend to think that in a digital world bits are just bits and do not get corrupted — which is decidedly untrue.
I wrote my own consistency checker, as I wasn't happy with what was out there. I wanted it to be simple, and maintainable in the long term (>10 years horizon). See https://github.com/jwr/ccheck if you need something like this. I now update my checksums regularly and check for corruption.
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How do I safely store my files?
Good point about bitrot. This is why I wrote ccheck.pl (https://github.com/jwr/ccheck) — I wanted to be able to check and detect bitrot in a way that depends on as little technology as possible.
App-perlbrew
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Perl support in Liquidprompt
Perlbrew on github
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Setting up a free Oracle Database for Perl development
Note that this Oracle Linux VM comes with Perl 5.26, if you want a more recent version, you could use use Perlbrew.
- Perlbrew – a tool to manage multiple Perl installations
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perl on WSL, Visual Studio code, Perl::LanguageServer
Install your own Perl with perlbrew, instead of using the system Perl. Then every needed dependency is installed in an isolated Perl with cpanm.
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Segregate Perl Projects with App::plx
The final and most exciting way to call --init is with a Perl version number. When called with a version number, Plx will look for a Perl of the given version first in your PATH and otherwise via Perlbrew.
- What Happened to Perl 7?
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perlbrew - Installation of Perl on User Directries 2022
perlbrew is a command line tool to intall Perl on user directries. You can install any version of Perl on your user directries and use it.
- Request for comments to perlbrew users
- 新しいPerlの資料が少ない
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Corinna: Why is Perl not putting Moose in the core?
Can't perlbrew be an option? AFAIK, it installs the Perl of your choice "next to" the Perl that comes with the OS, so both will continue to work.
What are some alternatives?
glacier_deep_archive_backup - Extremely low cost, off-site backup/restore using AWS S3 Glacier Deep Archive
plenv - Perl binary manager
voidvault - Bootstrap Void with FDE
Corinna - Corinna - Bring Modern OO to the Core of Perl
darktable - darktable is an open source photography workflow application and raw developer
Inline-Perl5 - Use Perl 5 code in a Raku program
berrybrew - Perlbrew for Windows!
(R)?ex - Rex, the friendly automation framework
roast - 🦋 Raku test suite
docker-perl - Dockerfiles for index.docker.io (official Perl Docker image)
zfs-on-mac - My personal ZFS on macOS instructions and scripts
perl-debug-adapter