05-19-2004
Both commands give me the same blocksize with vxfs.
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Hi,
Somehow i have forgotten a comand that displays me the block size of the unix filesystem. Can someone letme know this command
regards
penguin (5 Replies)
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Hello Unix guru's
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If I execute this command:
$ ls -lt | awk '{print $5}' | sort -nr |head -1
it returns the following value
57441881
If I execute this command:
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112208
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Hi All,
drwxr-xr-x 2 root root 4096 May 31 14:47 test
Please let me know here 4096 indicating what?
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Hello,
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LEARN ABOUT MOJAVE
digest::hmac
Digest::HMAC(3) User Contributed Perl Documentation Digest::HMAC(3)
NAME
Digest::HMAC - Keyed-Hashing for Message Authentication
SYNOPSIS
# Functional style
use Digest::HMAC qw(hmac hmac_hex);
$digest = hmac($data, $key, &myhash);
print hmac_hex($data, $key, &myhash);
# OO style
use Digest::HMAC;
$hmac = Digest::HMAC->new($key, "Digest::MyHash");
$hmac->add($data);
$hmac->addfile(*FILE);
$digest = $hmac->digest;
$digest = $hmac->hexdigest;
$digest = $hmac->b64digest;
DESCRIPTION
HMAC is used for message integrity checks between two parties that share a secret key, and works in combination with some other Digest
algorithm, usually MD5 or SHA-1. The HMAC mechanism is described in RFC 2104.
HMAC follow the common "Digest::" interface, but the constructor takes the secret key and the name of some other simple "Digest::" as
argument.
The hmac() and hmac_hex() functions and the Digest::HMAC->new() constructor takes an optional $blocksize argument as well. The HMAC
algorithm assumes the digester to hash by iterating a basic compression function on blocks of data and the $blocksize should match the
byte-length of such blocks.
The default $blocksize is 64 which is suitable for the MD5 and SHA-1 digest functions. For stronger algorithms the blocksize probably
needs to be increased.
SEE ALSO
Digest::HMAC_MD5, Digest::HMAC_SHA1
RFC 2104
AUTHORS
Graham Barr <gbarr@ti.com>, Gisle Aas <gisle@aas.no>
perl v5.18.2 2011-07-25 Digest::HMAC(3)