Ubuntu-ROS中出现的错误

环境：Ubuntu14.04，ROS Indigo

python-catkin-pkg-modules、python-catkin-pkg包无法安装

sudo apt-get install python-catkin-tools 时出现如下错误：
dpkg-deb：错误：归档 /var/cache/apt/archives/python-catkin-pkg-modules_0.4.11-1_all.deb 含有不合时宜的成员
…
以下的包无法安装：
/var/cache/apt/archives/python-catkin-pkg-modules_0.4.11-1_all.deb
/var/cache/apt/archives/python-catkin-pkg_0.4.11-100_all.deb
/var/cache/apt/archives/python-rosdistro-modules_0.7.3-1_all.deb
/var/cache/apt/archives/python-rosdistro_0.7.3-100_all.deb
/var/cache/apt/archives/python-rosdep_0.15.1-1_all.deb
/var/cache/apt/archives/python-rosinstall-generator_0.1.16-1_all.deb
解决：
sudo apt-get update
sudo apt-get upgrade
可能只与“Debian package management system”的更新有关–From https://blog.youkuaiyun.com/xiongmingkang/article/details/81325572

曾参考 https://blog.youkuaiyun.com/qq_35904625/article/details/81266079
尝试：gdk-pixbuf-query-loaders > /usr/lib/x86_64-linux-gnu/gdk-pixbuf-2.0/2.10.0/loaders.cache
结果：权限不够

曾参考 https://www.cnblogs.com/darklights/p/10542482.html
其解决策：sudo dpkg -i --force-overwrite /var/cache/apt/archives/python-rospkg-modules_1.1.7-1_all.deb
sudo apt-get -f install
根据：https://askubuntu.com/questions/148383/how-to-resolve-dpkg-error-processing-var-cache-apt-archives-python-apport-2-0/266912
结果：未尝试

Ubuntu更新时，boot空间不足

参考 https://blog.youkuaiyun.com/weixin_37272286/article/details/79897636 https://blog.youkuaiyun.com/forever__1234/article/details/80447834
结果：未解决问题

多工作空间的环境变量设置问题（.bashrc）

起因：
ROS每次执行命令都只能在一个工作空间中进行，连续运行多条source语句只有最后一条是有效的。
解决：
export ROS_PACKAGE_PATH=$ROS_PACKAGE_PATH:/home/siat/catkin_ws2/src:/home/siat/catkin_ws3/src
export语句要放到source语句的后面
From https://blog.youkuaiyun.com/u013453604/article/details/47423135

setup.*sh如何改变系统环境变量？ https://blog.youkuaiyun.com/kunLiu2011/article/details/61914971 devel下所有setup文件（setup.*sh）最后都指向setup.sh；–extend: skips the undoing of changes from a previously sourced setup file；ROS_PACKAGE_PATH变量中的多个目录是有先后顺序的；多工作空间配置问题
setup.bash解析 https://blog.youkuaiyun.com/robinhjwy/article/details/79597095 多工作空间串扰问题

http://answers.ros.org/question/205976/sourcing-from-multiple-workspaces/ You can also pass the --extend argument to the setup.bash file and it will only add to the environment rather than set the environment. This can be dangerous though.

https://stackoverflow.com/questions/31512079/setting-up-ros-catkin-rosbuild
It is possible to use multiple workspaces by sourcing the first one as usual and the following ones with the --extend flag. This worked for me with multiple catkin workspaces. Not sure if it will also work with a mixture of catkin and rosbuild but at least it is worth a try:
　source ~/rosbuild_ws/setup.bash
　source ~/catkin_ws/devel/setup.bash --extend