John the Ripper VPS/Dedicated Server Cracking – Multiple Core & Thread Research Tutorial

John the Ripper, also know as john in yum & apt package managers, is an open source password cracker and hash decipher program.

Here is a “How To” tutorial for using John the Ripper on VPS or Dedicated instances so that you can leave it running overnight, for example.

John the Ripper CentOS & Fedora installation & usage:

# john requires openssl-devel package
yum install openssl openssl-devel -y

# get the latest JUMBO version of John

# extract and enter the src folder
tar -xzvf john*
cd john*
cd src

# configure and make john
./configure && make

# navigate and run the test and benchmark script
cd ../run
./john --test






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