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PiePhy
Asked: 2017-09-12 06:17:03 +0800 CST

unable to generate the hash for netbeans 8.2

  • 772

I am unable to generate the hash for the netbeans 8.2 for Ubuntu 16.04 after I write the command: 

ravi@Dell:~/Downloads$ sha256 netbeans-8.2-linux.sh 
mlockall: Cannot allocate memory
Warning: couldn't lock memory, are you root?
Enter passphrase:

Now what is this passphrase?
What should I do now?

sha256

3 Answers

  1. I suspect that you should have execute sha256sum which calculate the checksum.

    sha256sum netbeans-8.2-linux.sh

    I also found NetBeans 8.2 C / C ++ for Linux Xubuntu 16.04 64/32 which specify:

    and check its sha256 (from Terminal: sha256sum path / filename).

    See below the difference between sha256 and sha256sum

    man sha256sum - compute and check SHA256 message digest
    man sha256 - hashalot - read a passphrase and print a hash

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  2. From man sha256 passphrase is just used to produce the hashing any thing is fine.

    DESCRIPTION
       hashalot is a small tool that reads a passphrase from standard input, hashes it using the given hash type, and
       prints the result to standard output.

       Warning: If you do not use the -x option, the hash is printed in binary. This may  wedge  your  terminal  set‐
       tings, or even force you to log out.

       This  is  not  a  general  purpose  hasher, only the first line is used, not even including the final newline.
       Thus, don't be surprised if the output seems to be different from other tools -- you'd have  to  hash  exactly
       the same string.
    • 2

  3. it hashes from std in, so perhaps this would work:

    cat netbeans-8.2-linux.sh  |sha256

    However, you have another issue there, you must set the the memory allocation, to get rid of the mlockall error.

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