Fix Failed to fetch

Fix Failed to fetch

Failed to fetch http://apt.thebigboss.org/repofiles/cydia/dists/stable/main/binary-iphoneos-arm/Package.bz2 Hash Sum mismatch
Some index files failed to download, they have been ignored, or old ones used instead

• 方法一

  1.在Cydia內刪除BigBoss源
  2.添加源，地址爲http://apt.thebigboss.org/repofiles/cydia/dists/stable/main/binary-iphoneos-arm/
      此時應該可以順利完成Download packages，而且此源內有內容
  3.在Cydia首頁內「更多軟件源」處繼續添加Bigboss源，添加後這個BigBoss源內應該爲空
  4.刪除步驟2中添加的源，數據從新加載後，步驟2的源的內容應當原封不動出如今BigBoss源內，大功告成。

• 方法二 有效

  try going to the Changes tab and then tap Refresh. If you still get those errors, you might be behind a proxy or firewall that's blocking the files Cydia is trying to download.

• 方法三

  Add this repo:
  cydia.angelxwind.net
  And install iCleaner Pro.
  Then run iCleaner pro and clean your system and try Cydia after respringing.