Iphone

If you need to delete the calendar, remove /private/var/mobile/Library/Calendar/Calendar.sqlitedb and then start up the calendar app. It will create a new empty one.

To force a resync go to itunes -> edit -> preferences -> tab: devices -> button: reset sync history.

Backups

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In order to back up Cydia do:

dpkg --get-selections > myapps.txt

copy myapps.txt to a safe place on the computer. After a fresh install of Cydia, apt strict and SSH on the iphone, copy the file back and

dpkg --set-selections < myapps.txt

apt-get update

apt-get upgrade

rm /private/var/mobile/Library/Caches/com.apple.mobile.installation.plist

killall SpringBoard