What is Arch Linux?
Note: Arch Linux still has GUI installers for new Linux users who are not ready to do it the hard way but where is the fun? Whether you’re on pure Arch or an Arch-based distro like Manjaro and Garuda Linux, we’ll show you how to safely update your system with one or two simple commands.
Differences between arm64 and aarch64
I have two «unlocked» devices, an iPad mini 3, and a Galaxy Edge 6, both endowed with a terminal and a minimalistic set of unix commands. I thought both devices have arm64 processors but when I ran
on both devices I got the following :
xxxxs-iPad:/var/mobile root# uname -a Darwin xxxx-iPad 14.0.0 Darwin Kernel Version 14.0.0: Wed Jun 24 00:50:15 PDT 2015; root:xnu-2784.30.7-30/RELEASE_ARM64_S5L8960X iPad4, **arm64**, J85mAP for the Samsung Galaxy s6 Edge :
u0_a203@zerolte:/ $ uname -a Linux localhost 3.10.61-4497415 #1 SMP PREEMPT Thu Apr 9 15:06:40 KST 2015 **aarch64** GNU/Linux If I am not wrong, the last info in both case, J85mAP and GNU/Linux, stand for firmwares, and the antepenultimate infos, arm64 and aarch64, stand for the processors.
My questions are the following : obviously the strings «arm64» and «aarch64» are not the same, but I always thought arm64 and aarch64 were the same. (It’s even told when you put the arm64 tag to a question here.)
So, are they really identical?
Especially, what should I worry about in case of cross-building libraries for both targets ? In fact, I have gcc 5.2.0 in mind, but maybe also lower versions. Can I just pass
according to which device I target and just worry about the rest of options to configure?
EDIT Hum, look for this again, without success.
AArch64 is the 64-bit state introduced in the Armv8-A architecture (https://en.wikipedia.org/wiki/ARM_architecture#ARMv8-A). The 32-bit state which is backwards compatible with Armv7-A and previous 32-bit Arm architectures is referred to as aarch32. Therefore the GNU triplet for the 64-bit ISA is aarch64. The Linux kernel community chose to call their port of the kernel to this architecture arm64 rather than aarch64, so that’s where some of the arm64 usage comes from.
As far as I know the Apple backend for aarch64 was called arm64 whereas the LLVM community-developed backend was called aarch64 (as it is the canonical name for the 64-bit ISA) and later the two were merged and the backend now is called aarch64.
So AArch64 and ARM64 refer to the same thing.
It seems that ARM64 was created by Apple and AARCH64 by the others, most notably GNU/GCC guys.
After some googling I found this link:
The LLVM 64-bit ARM64/AArch64 Back-Ends Have Merged
So it makes sense, iPad calls itself ARM64, as Apple is using LLVM, and Edge uses AARCH64, as Android is using GNU GCC toolchain.
It is easy to make the mistake that they are not the same. I have a library from Maxim Integrated developed presumably with GNU toolchain (aarch64). It is completely unusable in the XCode development environment for arm64. The MacBook Pro is model A1278. XCode is version 12.4. macOS Catalina v10.15.7. The ld command on the Mac will indicate that we are trying to link with an unknown-unsupported file format. Further investigation shows that the Maxim library, created with the ar command I believe, needs to be modified by running ranlib on it. At first I thought this was an aarch64 vs arm64 issue; I was wrong.
GCC thinks they differ;
LLVM thinks they are the same;
Linux thinks they are the same;
find ./* -name aarch64 ./tools/testing/selftests/kvm/lib/aarch64 ./tools/testing/selftests/kvm/include/aarch64 ./tools/testing/selftests/kvm/aarch64 find ./* -name arm64 ./arch/arm64 ./Documentation/arm64 ./Documentation/translations/zh_CN/arm64 ./drivers/acpi/arm64 ./include/config/crypto/ghash/arm64 ./include/config/crypto/crct10dif/arm64 ./include/config/crypto/aes/arm64 ./include/config/crypto/sha1/arm64 ./include/config/crypto/sha2/arm64 ./include/config/crypto/sm3/arm64 ./include/config/crypto/sha512/arm64 ./include/config/arm64 ./include/config/exynos/arm64 ./scripts/dtc/include-prefixes/arm64 ./tools/testing/selftests/arm64 ./tools/arch/arm64 ./tools/perf/arch/arm64 ./tools/perf/pmu-events/arch/arm64 Tensorflow-aarch64, TensorFlow is an open source software library for high performance numerical computation. Its flexible architecture allows easy deployment of computation across a variety of platforms (CPUs, GPUs, TPUs), and from desktops to clusters of servers to mobile and edge devices. Originally developed by …
ARRCH GaregeSky Movie
ARRCH_Family Story_part1
ARRCH ModelHouse
What is Arch Linux?
Arch Linux is an independent Linux distribution that adheres to the principles of simplicity, modernity, pragmatism, user centrality, and versatility. It is a minimalist, lightweight, and bleeding edge distro targeting proficient GNU/Linux users over the idea of trying to be appealing to as many users as possible. Arch promotes the do-it-yourself (DIY) attitude among its users and thus provides you with the freedom to tweak your system according to your needs.
Advantages of Arch Linux:
Arch is bleeding-edge:
Arch Linux follows a rolling release model, this essentially means that you get all the new features and updates as soon as they roll out. There is no need for versions when updating and upgrading your system boils down to a simple command mentioned below.
Arch is what you want it to be:
Arch Linux offers absurd amounts of customizability to its users. A clean installation of Arch doesn’t even include a Desktop Environment or a Window Manager. The user builds their system from the ground up. This approach also makes Arch extremely lightweight because there is no preinstalled bloat on the system, you the user have full freedom of what you want and when you want it.
The Arch User Repository (AUR):
A unique feature that makes Arch stand out among other distros is the arch user repository (AUR). It is a community-driven repository for Arch users. It contains package descriptions (PKGBUILDs) that allow you to compile a package from source with makepkg and then install it via pacman. The AUR was created to organize and share new packages from the community and to help expedite popular packages’ inclusion into the community repository. AUR extends the software offerings of Arch’s official repository much further and beyond.
The Holy Arch Wiki:
Arch Linux is one of the, if not the most well documented Linux distros out there. The Arch wiki is the stuff of legends among the Linux enthusiasts. It is extremely well documented and massive. Its offerings extend beyond Arch Linux itself at times. If you run into some trouble with your system, the Arch Wiki probably has the solution already.
It is a bridge:
Package Manager (pacman), the package manager of Arch Linux is pretty unique in its own right. It is flexible enough to support the installation of binary packages from the Arch repository, as well as binaries compiled from source via makepkg. This makes Arch a bridge between the distros which allow the installation of binary packages via their package management systems and the distros which trade ease of users to allow their users to compile binaries from source with variable configurations.
Improve your understanding of Linux:
You won’t know how rewarding it is to get a clean installation of an Arch system unless you experience it yourself. The installation process is pretty complex since most of the things you will be doing won’t be GUI-assisted and you will be using CLI commands. Although this kind of complexity might sound scary to new users, it still has its own perks. The installation teaches you a lot about how Linux actually works, which you won’t bother learning because modern-day GUI installers take care of that for you. You are introduced to concepts like display managers, chroot, configuring networks, and much more during the installation itself.
Note: Arch Linux still has GUI installers for new Linux users who are not ready to do it the hard way but where is the fun?
If you are into cybersecurity, you must have heard of Black Arch. The Black Arch repository contains a massive list of security tools for penetration testers and security researchers. The downside of installing Black Arch for some users might be its massive size as it comes with all the tools which include the ones you are never going to use. The good news is you can integrate the Black Arch repository in your Arch system and fetch tools you need on-demand from the repository.
Other popular Linux distributions based on Arch:
Disadvantages of Arch Linux:
It is an advanced distribution:
Although, you might find Arch to be a very likely contender for your next distro hop, let me remind you that it is not at all a newbie-friendly distro. It is not recommended that an absolute Linux newbie tries out Arch. With the amount of customizability Arch offers in question, it is highly likely that a new user might potentially break their system trying to configure it in a totally wrong way. If you really want to try out Arch and you are not confident with your Linux skills, it is a much better idea to try out the installation in a virtual machine and then make the jump on a real system once you are confident enough.
Torchvision, Image Backend. Torchvision currently supports the following image backends: Pillow (default); Pillow-SIMD — a much faster drop-in replacement for Pillow with SIMD. If installed will be used as the default. accimage — if installed can be activated by calling torchvision.set_image_backend(‘accimage’); libpng — can …
How to Update Arch Linux
Has the time come to update your Arch Linux system? Whether you’re on pure Arch or an Arch-based distro like Manjaro and Garuda Linux, we’ll show you how to safely update your system with one or two simple commands.
Keeping packages up-to-date is important on any Linux distro. Arch operates on a rolling release model, delivering bleeding-edge updates to your virtual door as soon as they’re ready. Because of that, frequent updates (combined with effective backups) are necessary to avoid a broken system and corrupt packages.
RELATED: How to Back Up Your Linux System With rsync
Most Arch-based distros use the pacman package manager to download and install updates, a process technically referred to as “syncing.” You’ll use pacman commands to keep your packages synced and operational.
Apply a System Update on Arch Linux
To begin an update of all installed packages, open any terminal app and pass the following command:
You’ll be prompted for your password before the command can proceed. This command checks for available updates. If there are any, it will list the packages, along with their new version numbers.
You’ll then be prompted to confirm that you want to apply a full upgrade. Type y and hit Enter to confirm, or use n to cancel.
If you have packages that you suspect are corrupt, you can force a database download with your update to take care of those issues. Even if no updates are available, pacman will verify the integrity of your currently installed packages. Add a second y to the string to make that happen.
How to Update a Specific Package in Arch Linux
If you only want to update a Specific Package, use the same command that you used to install it, replacing package_name with your choice.
sudo pacman -S package_name
Warning: We don’t recommend upgrading specific packages while ignoring other available updates often. Because of Arch’s rolling release process, cherry-picking updates can cause issues.
If you’re not sure what the name of a package is, you can search your installed packages using the -Qs flag.
Be sure to replace string with your search term. This will search both package names and descriptions, so you should find what you’re looking for easily.
RELATED: 37 Important Linux Commands You Should Know
2020 ARRCH MODEL HOUSE_contents3, 2020年 期間限定公開のモデルハウス「ガレージスカイ」。3部作の最終章contents3では、このモデルハウスのオススメポイントでもある2Fスカイ
Arch command in Linux with examples
arch command is used to print the computer architecture. arch command prints things such as “i386, i486, i586, alpha, arm, m68k, mips, sparc, x86_64, etc.
- arch –help : It displays help information.
- arch –version : It displays version information.
DJ Arch Jnr, Officially The Worlds Youngest DJ, Winner Of SA’s Got Talent 2015 and djay Pro Youngest Ambassador (8yrs old)