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有朋友問(wèn)到：
啟動(dòng)后，出現(xiàn)提示：是否升級(jí)到Ubuntu 14.04，點(diǎn)擊升級(jí)后，在進(jìn)行到第二步時(shí)出現(xiàn)提示：

W:Failed to fetch http://ports.ubuntu.com/dists/trusty/Release Unable to find expected entry 'main/binary-armel/P, W:Failed to fetch http://ports.ubuntu.com/dists/trusty-security/Release Unable to find expected entry 'main/bin, W:Failed to fetch http://ports.ubuntu.com/dists/trusty-updates/Release Unable to find expected entry 'main/bina, W:Failed to fetch http://ports.ubuntu.com/ubuntu-p ... ty-security/Release Unable to find expected en, W:Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/trusty/Release Unable to find expected entry 'main, W:Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/trusty-updates/Release Unable to find expected ent, E:Some index files failed to download. They have been ignored, or old ones used instead.

板子在啟動(dòng)后已經(jīng)能夠正常上網(wǎng)訪問(wèn)internet。

apt-get update 操作都正常，不知道是不是這個(gè)操作系統(tǒng)不能升級(jí)？

回復(fù)：

一般arm的不這樣升級(jí)Ubuntu系統(tǒng)

可通過(guò)更換鏡像來(lái)包來(lái)實(shí)現(xiàn)。