sudo tar -xvJf arm-linux-gnueabi-5.4.0.tar.xz -C /

回答: 命令"sudo tar -xvJf arm-linux-gnueabi-5.4.0.tar.xz -C /"的作用是将arm-linux-gnueabi-5.4.0.tar.xz压缩包解压到根目录"/"下。\[1\]这个命令会将解压后的文件放置在"/usr/local/arm"目录下。\[1\]
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