How to check crc of a file?

Question

I was looking this question and appears everything but crc. Is there a good Ubuntu way around there to do this?

Answer 1

$ sudo apt-get install libarchive-zip-perl
$ crc32 my_file

Answer 2

One way to calculate it is this:

cksum "file"

Another one is

crc32 "file"

To use this last command you need to install libarchive-zip-perl package

Answer 3

You can try to use rhash.

• http://rhash.sourceforge.net/
• https://github.com/rhash/RHash
• http://manpages.ubuntu.com/manpages/bionic/man1/rhash.1.html

Test:

$ sudo apt-get install rhash
$ echo -n 123456789 | rhash --simple -
cbf43926  (stdin)

Answer 4

I'd use the internal md5sum one of the provided sha programs:

sha1sum (1)          - compute and check SHA1 message digest
sha224sum (1)        - compute and check SHA224 message digest
sha256sum (1)        - compute and check SHA256 message digest
sha384sum (1)        - compute and check SHA384 message digest
sha512sum (1)        - compute and check SHA512 message digest

cksum is pretty much outmoded these days because of its problems.

Answer 5

cksfv app from cksfv package generates CRC32 checksum as well.

Answer 6

you can accomplish this with a very simple perl script. use String::CRC32;

my $s = <STDIN>;
my $crc = crc32($s);
printf "%08x\n", $crc;