ROS系统安装配置复杂，一台机器安装完成之后，如何快速在其他机器上拷贝安装，是一个重要问题。这里给出一个基于systemback的ROS备份安装方案。
Install Systemback on Ubuntu 18.04, 19.10 and 20.04
Ubuntu 16.04 users can install Systemback from PPA by running the following commands in terminal.
sudo add-apt-repository ppa:nemh/systemback sudo apt update sudo apt install systemback
The author of Systemback stopped its development in 2016, so Ubuntu 18.04, 19.10 and 20.04 are not in the supported list. If you run the above command on Ubuntu 18.04, you will see the following error,
E: The repository 'http://ppa.launchpad.net/nemh/systemback/ubuntu bionic Release' does not have a Release file.
or
E: Unable to locate package systemback
To install systemback on Ubuntu 18.04/19.10, first remove the PPA.
sudo add-apt-repository --remove ppa:nemh/systemback
The Systemback binary for Ubuntu 16.04 is compatible with Ubuntu 18.04/19.10/20.04, so we can add the Ubuntu 16.04 PPA on 18.04/19.10. Run the following command to import the GPG signing key of this PPA so that the package manager can verify signature. The signing key can be found on launchpad.net.
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 382003C2C8B7B4AB813E915B14E4942973C62A1B
If you see the following error:
gpg: keyserver receive failed: no keyserver available
or
gpg: keyserver receive failed: No data
You can fix this error by using a different keyserver. So instead of keyserver.ubuntu.com you can use pgp.mit.edu.
sudo apt-key adv --keyserver pgp.mit.edu --recv-keys 382003C2C8B7B4AB813E915B14E4942973C62A1B
Then add the PPA on Ubuntu 18.04/19.10/20.04.
sudo add-apt-repository "deb http://ppa.launchpad.net/nemh/systemback/ubuntu xenial main"
Update package list and install Systemback.
sudo apt update sudo apt install systemback
注意：如果你遇到一下错误（不能访问cn.archive.ubuntu.com导致无法完成下载），那么需要更换访问源的网址
解决方案：终端输入
sudo vi /etc/apt/sources.list
将打开的文件中所有的http://cn.archive.ubuntu.com更换为镜像的网址即可（我这边用的阿里云 http://mirrors.aliyun.com/ubuntu/）
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Then you can start Systemback from your application menu. You need to enter your password to use this software. After you enter the password, click OK button.
As you can see, you can create restore points of your system, restore to a point, copy the system to another partition, install the system to a new partition, create live system (bootable ISO image), repair the system and upgrade software on the system.
标签：keyserver,备份,sudo,apt,systemback,Ubuntu,ROS,ubuntu From： https://www.cnblogs.com/carsonzhu/p/16715057.html