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Compile OpenWrt on Ubuntu 22.04.4

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### Environment Setup - Prepare a virtual machine with 8 CPU cores, 4GB RAM, and at least 40GB hard disk. ### Software Update - Run `sudo apt-get update` and `sudo apt-get upgrade`. ### Install Dependencies - Install a list of required packages using `sudo apt install -y ...`. ### Compile Firmware 1. **Download Source Code**: Choose one of the repositories to clone: - Official version: `git clone https://github.com/openwrt/openwrt` - LEDE version: `git clone https://github.com/coolsnowwolf/lede` - Lienol version: `git clone -b 22.03 --single-branch https://github.com/Lienol/openwrt` 2. **Add Plugins/Themes**: After cloning, edit `feeds.conf.default` to include necessary plugins and themes. 3. **Update Source Code**: Run `./scripts/feeds update -a` and `./scripts/feeds install -a`. 4. **Customize Plugins**: Use `make menuconfig` to configure the build. 5. **Download Libraries and Compile Firmware**: Use `make -j8 download V=s` and `make V=s -j8` to compile. Adjust the thread count as needed. 6. **Output Path**: Compiled firmware will be found in `home/username/openwrt/bin/targets`. ### Example Configuration for Xiaomi R4A - A sample `.config` file is provided with specific package configurations. ### Enable SSH Access on Ubuntu 1. Switch to root: `sudo -i`. 2. Set root password: `passwd root`. 3. Allow root login by modifying `/etc/ssh/sshd_config`. 4. Enable password authentication. 5. Restart SSH service: `service sshd restart`. ### Install and Start SSH 1. Switch to root: `sudo -i`. 2. Update software

Environment Preparation:
Virtual machine ready, 8-core CPU, 4GB RAM, recommended 40GB hard disk

1. Update Software#

sudo apt-get update
sudo apt-get upgrade

2. Install Dependencies#

sudo apt install -y ack antlr3 asciidoc autoconf automake autopoint binutils bison build-essential \
bzip2 ccache cmake cpio curl device-tree-compiler fastjar flex gawk gettext gcc-multilib g++-multilib \
git gperf haveged help2man intltool libc6-dev-i386 libelf-dev libglib2.0-dev libgmp3-dev libltdl-dev \
libmpc-dev libmpfr-dev libncurses5-dev libncursesw5-dev libreadline-dev libssl-dev libtool lrzsz \
mkisofs msmtp nano ninja-build p7zip p7zip-full patch pkgconf python2.7 python3 python3-pyelftools \
libpython3-dev qemu-utils rsync scons squashfs-tools subversion swig texinfo uglifyjs upx-ucl unzip \
vim wget xmlto xxd zlib1g-dev

3. Compile Firmware#

1. Download Source Code, choose any one of the three#

git clone https://github.com/openwrt/openwrt # Official version
git clone https://github.com/coolsnowwolf/lede # lede version
git clone -b 22.03 --single-branch https://github.com/Lienol/openwrt # lienol version

2. Add Plugins or Themes#

After cloning any of the above versions, enter
Open the openwrt folder, find the feeds.conf.default file, open it, and add to the bottom!

src-git amlogic https://github.com/ophub/luci-app-amlogic   Must add
src-git alist https://github.com/sbwml/luci-app-alist               Alist plugin
src-git passwall_packages https://github.com/xiaorouji/openwrt-passwall.git;packages
src-git passwall_luci https://github.com/xiaorouji/openwrt-passwall.git;luci  
src-git kenzo https://github.com/kenzok8/openwrt-packages
src-git argonnew https://github.com/jerrykuku/luci-theme-argon.git;main    Theme

3. Update Source Code#

./scripts/feeds update -a # Update source code
./scripts/feeds install -a # Copy source code

4. Customize Plugins#

make menuconfig

If reconfiguration is needed

Method: Use the command
rm -rf ./tmp && rm -rf .config
make menuconfig
make V=s -j$(nproc)

5. Download dl library, compile firmware (the number after -j is the number of threads)#

make -j8 download V=s  # Download dl library, V=s shows detailed task information

make V=s -j8  # 8 represents threads, adjust according to personal situation

If the compilation fails, you can execute the following commands:

“make clean” deletes files in the compilation directory /bin and /build_dir

“make dirclean” deletes not only the compilation directory but also the compilation tool directory, deletes files in /bin and /build_dir (make clean) as well as files in /staging_dir, /toolchain, /tmp, and /logs, generally only operated when changing CPU architecture.

6. Download Compiled Compressed Package#

After compilation, output path: home/username/openwrt/bin/targets

Appendix: Xiaomi R4A Gigabit Version .config Configuration File#

CONFIG_TARGET_ramips=y
CONFIG_TARGET_ramips_mt7621=y
CONFIG_TARGET_ramips_mt7621_DEVICE_xiaomi_mi-router-4a-gigabit=y
CONFIG_PACKAGE_6in4=y
CONFIG_PACKAGE_frpc=y
CONFIG_PACKAGE_ip6tables=y
CONFIG_PACKAGE_ipv6helper=y
CONFIG_PACKAGE_kmod-ip6tables=y
CONFIG_PACKAGE_kmod-ipt-nat6=y
CONFIG_PACKAGE_kmod-iptunnel=y
CONFIG_PACKAGE_kmod-iptunnel4=y
CONFIG_PACKAGE_kmod-nf-ipt6=y
CONFIG_PACKAGE_kmod-nf-log6=y
CONFIG_PACKAGE_kmod-nf-nat6=y
CONFIG_PACKAGE_kmod-nf-reject6=y
CONFIG_PACKAGE_kmod-sit=y
CONFIG_PACKAGE_luci-app-frpc=y
CONFIG_PACKAGE_luci-app-nps=y
CONFIG_PACKAGE_luci-i18n-frpc-zh-cn=y
CONFIG_PACKAGE_luci-i18n-nps-zh-cn=y
CONFIG_PACKAGE_luci-theme-argon-mod=y
CONFIG_PACKAGE_npc=y

Appendix: Enable Root Login SSH Permission on Ubuntu#

  1. Switch to root after logging in as a normal user
    sudo -i

  2. Create root administrator password

passwd root

  1. Enable root login

sudo sed -i 's/^#?PermitRootLogin.*/PermitRootLogin yes/g' /etc/ssh/sshd_config

  1. Enable password authentication

sudo sed -i 's/^#?PasswordAuthentication.*/PasswordAuthentication yes/g' /etc/ssh/sshd_config

  1. Restart ssh service

service sshd restart

Appendix: Method to Enable SSH Login:#

  1. Must switch to root user

sudo -i

  1. First update the software list and update software

sudo apt-get update

  1. First update the software list and update software

sudo apt-get upgrade

  1. Install ssh

apt-get install ssh

  1. Start ssh service

sudo /etc/init.d/ssh start

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