在Releases · Openwrt-Passwall/openwrt-passwall2 获取版本号

# 进入临时目录
cd /tmp

# 下载最新包 (以26.1.27为例)
wget https://github.com/Openwrt-Passwall/openwrt-passwall2/releases/download/26.1.27-1/luci-app-passwall2_26.1.27-r1_all.ipk
wget https://github.com/Openwrt-Passwall/openwrt-passwall2/releases/download/26.1.27-1/luci-i18n-passwall2-zh-cn_26.1.27_all.ipk

# 安装
opkg install luci-app-passwall2*.ipk luci-i18n-passwall2-zh-cn*.ipk

# 清理
rm -f *.ipk