dedalodaelus/ArmbianShrink：让你的 armbian 图像更小！ (github.com)
wget https://raw.githubusercontent.com/dedalodaelus/ArmbianShrink/master/armbianshrink.sh
chmod +x armbianshrink.sh
sudo mv armbianshrink.sh /usr/local/bin
[user@localhost ArmbianShrink]$ sudo armbianshrink.sh armbian.img
e2fsck 1.42.9 (28-Dec-2013)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
/dev/loop1: 88262/1929536 files (0.2% non-contiguous), 842728/7717632 blocks
resize2fs 1.42.9 (28-Dec-2013)
resize2fs 1.42.9 (28-Dec-2013)
Resizing the filesystem on /dev/loop1 to 773603 (4k) blocks.
Begin pass 2 (max = 100387)
Relocating blocks XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Begin pass 3 (max = 236)
Scanning inode table XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Begin pass 4 (max = 7348)
Updating inode references XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
The filesystem on /dev/loop1 is now 773603 blocks long.
Shrunk armbian.img from 30G to 3.1Gsudo armbianshrink.sh [-s] imagefile.img [newimagefile.img]dedalodaelus/ArmbianShrink: Make your armbian images smaller! (github.com)