bitbake常用命令

分享一些yocto常用命令

http://wiki.kaeilos.com/index.php/Bitbake_options

bitbake

Build package (including creating package)

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$ bitbake -c cleansstate <pkgname>

Cleans up all the tasks state with regard to the given This =ption is frequently used during the development of new recipes

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$ bitbake -e <pkgname>

Displays the internal state of variables used by BitBake =E6��示bb有哪些任务

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$ bitbake <pkgname> -c listtasks

Tasks available for a package/recipe

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$ bitbake <pkgname> -c rebuild -f

Clean and build again a package

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$ bitbake <pkgname> -c fetch -f 强制下载代码

Download again the source program 交互模式

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$ bitbake <pkgname> -c devshell

Expand a gnome xterm ready to raise commands

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$ bitbake <pkgname> -c clean/compile 编译或者清理单个包

Clean or compile package.

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$ bitbake package-index

Make package index files for feeds

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$ bitbake <target_image>

Build image contains task-base packages

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$ bitbake <target_image> -c buildall -f

Build pending packages for \code{target_image}

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$ bitbake <target_image> -c rootfs -f

Populate rootfs again for \code{target_image}

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$ bitbake -e <pkgname> | grep ^S=

Finds the source code. 输出包代码的位置

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$ bitbake -e <target> | grep ^WORKDIR=

Finds bitbakes’s working directory.

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$ bitbake -e <image-target> | grep ^IMAGE_FSTYPES=

Finds the image types being build

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$ bitbake -h

Prints out the following help page

Show package dependencies

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$bitbake -g <pkg> && cat pn-depends.dot | grep -v -e '-native' | grep -v =igraph | grep -v -e '-image' | awk '{print $1}' | sort | uniq

bitbake-layers

usage: bitbake-layers [arguments]

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Available commands:
 help
   display general help or help on a specified command
 show-recipes =E6��看所有的recipes名字
   list available recipes, showing the layer they are provided by
 show-cross-depends
   figure out the dependency between recipes that crosses a layer =oundary.
 show-appends
   list bbappend files and recipe files they apply to
 flatten
   flattens layer configuration into a separate output directory.
 show-layers
   show current configured layers
 show-overlayed
   list overlayed recipes (where the same recipe exists in another =ayer)

bitbake-layers show-layers 察看层

bitbake-layers show-overlayed

bitbake agl-demo-platform-crosssdk 编译SDK

bitbake virtual/kernel -c menuconfig  图形化配置内核

Linux添加swap交换分区(虚拟内存)

确认是否有swap

可以执行free -m 命令查看，如果有swap一行且total项下不为零的话就是存在swap，就不适合再进行添加swap。

添加swap

以下以添加2GB SWAP为例。
（SWAP一般设置为内存的2倍，并非完全以此为标准，只适合4GB以下内存，count后面的数为要设置的swap大小xxMB）

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$ dd if=/dev/zero of=/var/swapfile bs=1M count=2048 # 生成文件块
$ /sbin/mkswap /var/swapfile
$ /sbin/swapon /var/swapfile # 激活swap文件
$ /sbin/swapon -s # 查看一下swap是否正确：
$ chmod 0600 /var/swapfile # 修改文件权限

添加开机自动挂载设置

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$ vi /etc/fstab
$ echo "/var/swapfile swap swap defaults 0 0" >>/etc/fstab

SWAP删除方法：

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$ /sbin/swapoff /var/swapfile # 无效swap
$ rm -f /var/swapfile # 删掉添加的自动挂载swap的设置

删除开机自动挂载设置

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vi /etc/fstab

Use ubuntu in docker

Search Docker images

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$ docker search ubuntu

Download Ubuntu docker images

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$ docker run --name Ubuntu -dt ubuntu

Run bash in Ubuntu docker

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$ docker exec -it Ubuntu bash

Leave Ubuntu docker

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$ exit

Start Docker

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$ docker stop Ubuntu

Stop Docker

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$ docker stop Ubuntu

How to install docker on Ubuntu 16.04

Install using the repository

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$ sudo apt-get update
$ sudo apt-get install \
    apt-transport-https \
    ca-certificates \
    curl \
    gnupg-agent \
    software-properties-common
$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
$ sudo apt-key fingerprint 0EBFCD88
$ sudo add-apt-repository \
   "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
   $(lsb_release -cs) \
   stable"
$ sudo apt-get update
$ sudo apt-get install docker-ce docker-ce-cli containerd.io

Install specific version

List the available versions in the repo, then select and install.

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$ apt-cache madison docker-ce
$ sudo apt-get install docker-ce=<VERSION_STRING> docker-ce-cli=<VERSION_STRING> containerd.io

Test with hello-world

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$ sudo docker run hello-world

Use docker without root

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cat /etc/group | grep docker # 查找 docker 组，确认其是否存在
groups # 列出自己的用户组，确认自己在不在 docker 组中

# 如果 docker 组不存在，则添加之：
sudo groupadd docker

# 将当前用户添加到 docker 组
sudo gpasswd -a ${USER} docker

# 重启服务
sudo service docker restart

# 切换一下用户组（刷新缓存）
newgrp - docker;
newgrp - `groups ${USER} | cut -d' ' -f1`; # TODO：必须逐行执行，不知道为什么，批量执行时第二条不会生效
# 或者，注销并重新登录
pkill X

How to install node on Ubuntu

Node.js v11.x:

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$ curl -sL https://deb.nodesource.com/setup_11.x | sudo -E bash -
$ sudo apt-get install -y nodejs

Node.js v10.x:

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$ curl -sL https://deb.nodesource.com/setup_10.x | sudo -E bash -
$ sudo apt-get install -y nodejs