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+----- Thread: iOS 9.3.3 Jailbreak: Fix Cydia Error failed in buffer_write(fd) (8, ret=-1) (/showthread.php?tid=5353185)
iOS 9.3.3 Jailbreak: Fix Cydia Error failed in buffer_write(fd) (8, ret=-1) - gmanthedMan - Jul 27, 2016
(BEFORE Bashing this thread, it is not my guide, however something very useful for new JB users on the new semi-tethered)
Reason i put this is because i had this issue and found out that this works.
(I recommend doing both)
Source: http://www.valuewalk.com/2016/07/ios-9-3-3-jailbreak-fix-cydia-error-failed-in-buffer/
^looks like it copy pasted as well
Step 1: To start with, you need to launch the Cydia app from the Home screen on your already jailbroken device. Once you have done that, you need to open the sources tab from the bottom.
Step 2: Now you need to add a new repository. So tap “edit” and then “add,” and then enter the following: https://coolstar.org/publicrepo
Step 3: Next, you need to search and install the Stashing tweak for iOS 9.2 – 9.3.3. This tweak can be considered to be a patch as it takes over the handling of where tweaks are installed on your device.
This enables it to circumvent the issues with the size of certain pieces of data areas on iPads and iPhones. Because you have installed “Stashing for iOS 9.2-9.3.3,” all tweaks will now be installed onto your iPhone’s or iPad’s data partition.
As you can see, all it takes is three simple steps to get you back up and running with a working jailbreak and Cydia.
If that didn’t work – Try this!
Not everyone will benefit from the fix above, so before you start to think that’s it for you, try out the second method below.
Step 1: Look for and install Apple File Conduit 2 from Cydia on your device.
Step 2: Now install iFunbox onto your computer and then connect your device to it.
Step 3: Next, launch iFunbox and once running, from the left column where your device is shown as connected, click the Raw File System.
Step 4: Look on the right-hand column where the files and folders are displayed and find and rename the file /.cydia_no_stash to /.cydia_no_stash-