ssh登录后
apt update
apt install lrzsz
cd /usr/share/plymouth/themes/
tar -czf portrait.tar.gz portrait
# cd /usr/share/plymouth/themes/portrait
cd portrait
rz # 上传图片
# 替换默认图片
mv progress-0_ym.png progress-0.png
mv progress-1_ym.png progress-1.png
plymouth-set-default-theme -l
plymouth-set-default-theme -R portrait
update-grub
reboot
效果如下：
