Difference between revisions of "How to use xdelta and download only differential update files"

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(check integrity and minor clarification)
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For those having a slow connection, it is possible to download a smaller differential file that contains only the new Alpine version changes. You can then use the downloaded xdelta file to update your previous Alpine release iso file to the new one. You will still need to download the new iso checksum file and test the integrity of the newly built iso file. For xdelta to work you should have the three files on the same directory level, i.e.: alpine-1.10.3-1.10.4.xdelta, alpine-1.10.3-x86.iso and the alpine-1.10.4-x86.iso.sha1    
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For those having a slow connection, it is possible to download a smaller differential file that contains only the new Alpine Linux version changes. If you have an ISO file of the version immediately prior to the latest version, you can then use the downloaded xdelta file to update to the latest ISO. You will still need to download the new ISO checksum file and test the integrity of the newly built ISO file. For xdelta to work you should have the three files on the same directory level, i.e.: alpine-1.10.3-1.10.4.xdelta, alpine-1.10.3-x86.iso (previous release) and the alpine-1.10.4-x86.iso.sha1
 
      
 
      
 
  wget –c http://www.alpinelinux.org/cgi-bin/dl.cgi/v1.10/releases/alpine-1.10.3-1.10.4.xdelta
 
  wget –c http://www.alpinelinux.org/cgi-bin/dl.cgi/v1.10/releases/alpine-1.10.3-1.10.4.xdelta
 
  wget http://www.alpinelinux.org/cgi-bin/dl.cgi/v1.10/releases/alpine-1.10.4-x86.iso.sha1
 
  wget http://www.alpinelinux.org/cgi-bin/dl.cgi/v1.10/releases/alpine-1.10.4-x86.iso.sha1
  
Make sure you have xdelta3 installed and build the new iso
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Make sure you have xdelta3 installed and build the new ISO:
  
 
  apk add xdelta3
 
  apk add xdelta3
 
  xdelta3 -d alpine-1.10.3-1.10.4.xdelta
 
  xdelta3 -d alpine-1.10.3-1.10.4.xdelta
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Check the integrity of the file:
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sha1sum -c alpine-1.10.4-x86.iso.sha1
  
 
If checking the integrity of the file shows: alpine-1.10.4-x86.iso: OK then you are ready to continue.
 
If checking the integrity of the file shows: alpine-1.10.4-x86.iso: OK then you are ready to continue.

Revision as of 05:06, 10 June 2010

For those having a slow connection, it is possible to download a smaller differential file that contains only the new Alpine Linux version changes. If you have an ISO file of the version immediately prior to the latest version, you can then use the downloaded xdelta file to update to the latest ISO. You will still need to download the new ISO checksum file and test the integrity of the newly built ISO file. For xdelta to work you should have the three files on the same directory level, i.e.: alpine-1.10.3-1.10.4.xdelta, alpine-1.10.3-x86.iso (previous release) and the alpine-1.10.4-x86.iso.sha1

wget –c http://www.alpinelinux.org/cgi-bin/dl.cgi/v1.10/releases/alpine-1.10.3-1.10.4.xdelta
wget http://www.alpinelinux.org/cgi-bin/dl.cgi/v1.10/releases/alpine-1.10.4-x86.iso.sha1

Make sure you have xdelta3 installed and build the new ISO:

apk add xdelta3
xdelta3 -d alpine-1.10.3-1.10.4.xdelta

Check the integrity of the file:

sha1sum -c alpine-1.10.4-x86.iso.sha1

If checking the integrity of the file shows: alpine-1.10.4-x86.iso: OK then you are ready to continue.