here we go again with hash sum mismatch after sudo apt-get update Ign http://mirrors.yun-idc.com trusty InRelease
Ign http://mirrors.yun-idc.com trusty-security InRelease
Ign http://mirrors.yun-idc.com trusty-updates InRelease
Hit http://mirrors.yun-idc.com trusty InRelease
Hit http://mirrors.yun-idc.com trusty Release.gpg
Hit http://mirrors.yun-idc.com trusty-security Release.gpg
Hit http://mirrors.yun-idc.com trusty-updates Release.gpg
Hit http://mirrors.yun-idc.com trusty/main Sources
Hit http://mirrors.yun-idc.com trusty/universe Sources
Hit http://mirrors.yun-idc.com trusty/non-free Sources
Get:1 http://mirrors.yun-idc.com trusty/main i386 Packages [167 kB]
Get:2 http://mirrors.yun-idc.com trusty/universe i386 Packages [123 kB]        
Hit http://mirrors.yun-idc.com trusty/non-free i386 Packages                  
Hit http://mirrors.yun-idc.com trusty Release
Hit http://mirrors.yun-idc.com trusty-security Release
Hit http://mirrors.yun-idc.com trusty-updates Release
Hit http://mirrors.yun-idc.com trusty/main Sources                             
Hit http://mirrors.yun-idc.com trusty/restricted Sources                       
Hit http://mirrors.yun-idc.com trusty/universe Sources                     
Get:3 http://mirrors.yun-idc.com trusty/multiverse Sources [174 kB]         
Hit http://mirrors.yun-idc.com trusty/restricted i386 Packages                 
Hit http://mirrors.yun-idc.com trusty/main i386 Packages                       
Hit http://mirrors.yun-idc.com trusty/universe i386 Packages                  
Hit http://mirrors.yun-idc.com trusty/multiverse i386 Packages            
Hit http://mirrors.yun-idc.com trusty-security/main Sources               
Hit http://mirrors.yun-idc.com trusty-security/restricted Sources         
Hit http://mirrors.yun-idc.com trusty-security/universe Sources
Hit http://mirrors.yun-idc.com trusty-security/multiverse Sources
Hit http://mirrors.yun-idc.com trusty-security/main i386 Packages
Hit http://mirrors.yun-idc.com trusty-security/restricted i386 Packages
Hit http://mirrors.yun-idc.com trusty-security/universe i386 Packages
Hit http://mirrors.yun-idc.com trusty-security/multiverse i386 Packages
Hit http://mirrors.yun-idc.com trusty-updates/main Sources
Hit http://mirrors.yun-idc.com trusty-updates/restricted Sources
Hit http://mirrors.yun-idc.com trusty-updates/universe Sources
Hit http://mirrors.yun-idc.com trusty-updates/multiverse Sources
Hit http://mirrors.yun-idc.com trusty-updates/main i386 Packages
Hit http://mirrors.yun-idc.com trusty-updates/restricted i386 Packages
Hit http://mirrors.yun-idc.com trusty-updates/universe i386 Packages
Hit http://mirrors.yun-idc.com trusty-updates/multiverse i386 Packages
Fetched 464 kB in 6s (69.0 kB/s)                                               
W: Failed to fetch http://mirrors.yun-idc.com/deepi ... inary-i386/Packages  Hash Sum mismatch

E: Some index files failed to download. They have been ignored, or old ones used instead.