ROS命令管理器-压缩树莓派sd卡镜像的空间

说明

• 通过dd方式备份出来是原SD卡的大小，通常一个32G/64G的sd卡，备份时间就比较旧，加上恢复的时间就更久。
• 通过压缩镜像空间，可以大大缩短传输和恢复镜像的时间
• 环境： 独立的ubuntu主机 + rcm

步骤

• 利用rcm工具实现对镜像的缩减
• 假设源镜像地址位于： ~/ailibot.img, 大小为15G

# 安装rcm
curl -k https://www.ncnynl.com/rcm.sh | bash - 

# 缩小镜像
rcm common --imgsrc ~/ailibot.img  --imgdes ~/ailibot_s.img 

• 效果如下：

sd_system_smaller
This script is under DEV state !
Base on project :  https://github.com/Drewsif/PiShrink
sd_system_smaller start ...
/home/ubuntu/ailibot.img - /home/ubuntu/ailibot_s.img
PiShrink have installed!!
Begin to make image smaller!
Your imgsrc is:/home/ubuntu/ailibot.img
Your imgdes is:/home/ubuntu/ailibot_s.img
pishrink.sh v0.1.3
pishrink.sh: Copying /home/ubuntu/ailibot.img to /home/ubuntu/ailibot_s.img... ...
pishrink.sh: Gathering data ...
Creating new /etc/rc.local
pishrink.sh: Checking filesystem ...
PI_ROOT: 336607/969136 files (0.9% non-contiguous), 2386754/3873152 blocks
resize2fs 1.46.5 (30-Dec-2021)
pishrink.sh: Shrinking filesystem ...
resize2fs 1.46.5 (30-Dec-2021)
Resizing the filesystem on /dev/loop26 to 2567698 (4k) blocks.
Begin pass 2 (max = 360713)
Relocating blocks             XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Begin pass 3 (max = 119)
Scanning inode table          XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Begin pass 4 (max = 37334)
Updating inode references     XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
The filesystem on /dev/loop26 is now 2567698 (4k) blocks long.

pishrink.sh: Shrinking image ...
pishrink.sh: Shrunk /home/ubuntu/ailibot_s.img from 15G to 9.9G ...

• 首次使用，会自动下载脚本
• 经过压缩之后，原来15G的空间，缩小到9.9G
• 再按平常恢复镜像的方法来恢复就可以，会根据你的新sd卡大小自动扩充系统分区大小