In order to ensure that the files that are downloaded from a site has been saved in its entirety and to give the added security that no intruders have modified the content of the files, various techniques have been used by source providers like MD5 checksum, SHA1 checksum, PGP verification. To explain how MD5 checksum, SHA1 checksum or PGP verification of the files happen, I will go ahead by explaining the steps by using a copy of openSSL program. (more…)

Following are the listing of tools that can be used for various purposes in Linux, Windows environments and those which are available FREE of cost for downloads. This is the first compilation and will continue to grow as time progresses. (more…)