![]() ![]() Here we compare the two to verify the integrity of the files. In such cases, the issues usually lie in the transmission of the file. We use the scp command to transfer files securely between remote systems, sometime, the file or program might be working in the source location but presents issues in the destination location.If they match it means that the data was replicated successfully. For this, we compare the checksums of both backups. While we make incremental backups to files and directories, we may want to be sure that both versions match. ![]() We can also use this command to verify the checksums of two versions of a backup.If they match then the file is correct otherwise it is corrupt. To verify the validity of a downloaded file, in this case, we compare the checksum of the original version with the checksum of the downloaded version.There are many use cases where we would use these commands. This is the same for sha256sum command except that it uses the SHA-256 algorithm which is more secure and has fewer collisions compared to the former The command puts the specified file through the MD5 algorithm to produce a checksum. In Linux, we use the md5sum command which uses the MD5 algorithm to validate a checksum. MD5(message-digest algorithm) and SHA-256 are hashing algorithms that take in a message and produce a fixed-length digest we can use to verify the integrity of a file or directory. We learn about md5sum and sha256sum commands in Linux. MD5 (message-digest algorithm) and SHA-256 are hashing algorithms that take in a message and produce a fixed-length digest/hash we can use to verify the integrity of a file or directory. ![]()
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