explore sha1 in pharo
# Sha1 exploring use of Sha1 hash using pharo , upto pharo 13 # md5 some large files 41978439 1254400 -r--r--r-- 1 terry terry 1284499606 Aug 29 17:48 /home/terry/bin/cuis-smalltalk/Cuis-Smalltalk-Dev/.git/objects/pack/pack-61fe230b540d7d815ff049a3895f03c1f6657c11.pack 41767078 1498016 -rw-rw-r-- 1 terry terry 1533963181 Aug 4 08:43 /home/terry/bin/android/android-studio-2025.1.2.11-linux.tar.gz 42217982 2264068 -rw-rw-r-- 1 terry terry 2318401536 Aug 4 08:54 /home/terry/Android/Sdk/system-images/android-36/google_apis_playstore/x86_64/system.img 42469278 2096996 -rw-r--r-- 1 terry terry 2147483648 Aug 4 09:30 /home/terry/.android/avd/Medium_Phone.avd/snapshots/default_boot/ram.img 42356916 2352200 -rw-r--r-- 1 terry terry 2408710144 Aug 4 09:30 /home/terry/.android/avd/Medium_Phone.avd/userdata-qemu.img.qcow2 md5sum /home/terry/bin/cuis-smalltalk/Cuis-Smalltalk-Dev/.git/objects/pack/pack-61fe230b540d7d815ff049a3895f03c1f6657c11.pack echo md5sum /home/terry/bin/android/android-studio-2025.1.2.11-linux.tar.gz echo md5sum /home/terry/Android/Sdk/system-images/android-36/google_apis_playstore/x86_64/system.img echo md5sum /home/terry/.android/avd/Medium_Phone.avd/snapshots/default_boot/ram.img echo md5sum /home/terry/.android/avd/Medium_Phone.avd/userdata-qemu.img.qcow2 echo ********************************************************************************************************************************************************** c8dc00f395230ff7a0844e96db7c43e2 /home/terry/bin/cuis-smalltalk/Cuis-Smalltalk-Dev/.git/objects/pack/pack-61fe230b540d7d815ff049a3895f03c1f6657c11.pack > >>d330e882e3179d0d7926e7863d3576a4 /home/terry/bin/android/android-studio-2025.1.2.11-linux.tar.gz > >>e6f50fc996f47a96de85405325a20d2c /home/terry/Android/Sdk/system-images/android-36/google_apis_playstore/x86_64/system.img > >>67ecea33f0bb5e5dbfd765b049fefc7c /home/terry/.android/avd/Medium_Phone.avd/snapshots/default_boot/ram.img > >>f474529b8a34f4f8c81e562f2f3114d3 /home/terry/.android/avd/Medium_Phone.avd/userdata-qemu.img.qcow2 > ********************************************************************************************************************************************************** "we can get a file reference how read bytes ?" '/home/terry/bin/cuis-smalltalk/Cuis-Smalltalk-Dev/.git/objects/pack/pack-61fe230b540d7d815ff049a3895f03c1f6657c11.pack' asFileReference .