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28.6.3. 升級您的電腦
先前的開機選項
upgrade，已由安裝過程中的一個階段代替，在此情況下安裝程式會提示您升級，或重新安裝在您電腦上所偵測到的較早版本的 Red Hat Enterprise Linux。
然而，如果
/etc/redhat-release 檔案的內容遭到變更的話，安裝程式可能無法正確地偵測出舊版的 Red Hat Enterprise Linux。upgradeany 這項開機選項會略過安裝程式的這項測試，並允許您在舊版本未被正確識別的情況下升級 Red Hat Enterprise Linux。
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