我去看了一下該文章，他有提到JB重刷最好先關機
所以我早上刷b1，剛剛大膽刷b2，有成功!
原文:
Update #2: The b2 version of redsn0w includes the launchctl-related fix by @planetbeing as mentioned by @saurik here and here. As usual, you can just re-run redsn0w in jailbreak mode over your existing 5.0.1 jailbreak (even a PwnageTool one), making sure to de-select “Install Cydia” if you do. Always be sure to do a controlled “slide to power off” shutdown of your device before running redsn0w.
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更新:
剛刷完再檢查，CYDIA裝的軟體都失效
再刷一次b2，INSTALL CYDIA要勾，軟體才有效
怎會這樣
，記得要勾install cydia
