[ATfL] Add package documentation

Author: pawosm-arm

arm-software/linux/1-install.atfl.md

@@ -0,0 +1,86 @@
+## Installation
+
+This document describes how to download and install the  Arm(R) Toolchain for
+Linux.
+
+### Pre-installation step
+
+The first step is to configure your Linux package manager to be able to fetch
+packages from Arm.  This step only needs to be performed once.
+
+From the options below, select the packages repository matching with your
+installed Linux distribution.
+
+#### Ubuntu 22.04
+
+```
+??? $ curl "http://obs.oss.arm.com:82/arm-toolchains:/ubuntu-22/linux/Release.key" | sudo gpg --dearmor -o /usr/share/keyrings/obs-oss-arm-com.gpg
+
+??? $ echo "deb [signed-by=/usr/share/keyrings/obs-oss-arm-com.gpg] http://obs.oss.arm.com:82/arm-toolchains:/ubuntu-22/linux/ ./" | sudo tee /etc/apt/sources.list.d/obs-oss-arm-com.list
+
+$ sudo apt update
+```
+
+#### Ubuntu 24.04
+
+```
+??? $ curl "http://obs.oss.arm.com:82/arm-toolchains:/ubuntu-24/linux/Release.key" | sudo gpg --dearmor -o /usr/share/keyrings/obs-oss-arm-com.gpg
+
+??? $ echo "deb [signed-by=/usr/share/keyrings/obs-oss-arm-com.gpg] http://obs.oss.arm.com:82/arm-toolchains:/ubuntu-24/linux/ ./" | sudo tee /etc/apt/sources.list.d/obs-oss-arm-com.list
+
+$ sudo apt update
+```
+
+#### Red Hat Entrprise Linux 8
+
+```
+$ sudo dnf install 'dnf-command(config-manager)'
+
+??? $ sudo dnf config-manager -y --add-repo http://obs.oss.arm.com:82/arm-toolchains:/rhel-8/linux/arm-toolchains:rhel-8.repo
+```
+
+#### Red Hat Entrprise Linux 9
+
+```
+$ sudo dnf install 'dnf-command(config-manager)'
+
+??? $ sudo dnf config-manager -y --add-repo http://obs.oss.arm.com:82/arm-toolchains:/rhel-9/linux/arm-toolchains:rhel-9.repo
+```
+
+#### Amazon Linux 2023
+
+```
+$ sudo dnf install 'dnf-command(config-manager)'
+
+??? $ sudo dnf config-manager -y --add-repo http://obs.oss.arm.com:82/arm-toolchains:/amzn-2023/linux/arm-toolchains:amzn-2023.repo
+```
+
+#### SUSE Linux Enterprise Server 15
+
+```
+$ sudo zypper ar -f http://obs.oss.arm.com:82/arm-toolchains:/sles-15/linux/arm-toolchains:sles-15.repo
+```
+
+### Installation step
+
+Please select the command below appropriate for your Linux distribution. This
+will install Arm Toolchain For Linux, along with Arm Performance Libraries,
+which is a required dependency.
+
+#### Ubuntu systems
+
+```
+$ sudo apt install arm-toolchain-for-linux
+```
+
+#### Red Hat Enterprise Linux and Amazon Linux systems
+
+```
+$ sudo dnf install arm-toolchain-for-linux
+```
+
+#### SUSE Linux Enterprise Server systems
+
+```
+$ sudo zypper install arm-toolchain-for-linux
+```