How to Fix “failed in buffer_write(fd) (8, ret=-1)” Cydia Error When Installing Packages

Restore Cydia If any circumstances, Cydia will crash, it is easy to restore it with iFile. Use following step guides to restore Cydia with iFile. Both of These methods work for iPhone, iPod or iPad. These are the easiest ways to restore Cydia. 

Requrements for both step guides.  

iFile    Step guide 01 to restore Cydia with iFile   Step 01. Go Home screen and run the iFile and navigate following location (if you haven’t iFile, search and install it before start the guide) iFile — > etc — > apt — > sources.list.d
Step 02. There will be a source’s lists. Click on the edit button and highlight unnecessary soucre’s lists and delete. Then done editing.
Step 03. We advise you to delete any sources list if you don’ t want besides default sources as following list.
BigBoss.list, iSpazio.net.list, Modmyi.com.list, saurik.list yellowsn0w.com.list, and Zodttd.list
Step 04. Recommend you to delete cydia.list file. Then save and done editing.
Step 05. Open Cydia again. See there is no any Cydia errors now.
Here is another way to restore Cydia with iFile. This method little bit different than previous one. If you couldn’t fix Cydia crashing error problems with using previous step guide, please use this step guide too.
Step guide 02 to restore Cydia with iFile
Step 01. Go Home screen and open iFile. Then navigate following location.  iFile — > var — > lib — > apt — > lists
Step 02. Delete all the files, which are available in “lists” folder. Make sure not to delete the “Partial” Folder.
Step 03. Now navigate following location and Delete the all files, if it is available in “updates” folder. iFile — > var — > lib — > dpkg — > updates
Step 04. Finally, reboot your iDevice and open Cydia. See, now you have fixed Cydia crashing errors successfully.
Both of these step guides will help you to fix Cydia errors easily. So, recommend to use both trusted guides.