Collections: Integer factorization

By @sskaje
Link: https://sskaje.me/2013/12/collections-integer-factorization/

Integer factorization: http://en.wikipedia.org/wiki/Integer_factorization

In number theory, integer factorization or prime factorization is the decomposition of a composite number into smaller non-trivial divisors, which when multiplied together equal the original integer.

msieve: http://sourceforge.net/projects/msieve/

Msieve is a C library implementing a suite of algorithms to factor large integers. It contains an implementation of the SIQS and GNFS algorithms; the latter has helped complete some of the largest public factorizations known

msieve has CUDA supported!!

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Collections: Integer factorization by @sskaje: https://sskaje.me/2013/12/collections-integer-factorization/

Virtualized ARM on Ubuntu

By @sskaje
Link: https://sskaje.me/2013/12/virtualized-arm-ubuntu/

I was finding articles/wikis how to emulate an arm linux (armel) on centos/ubuntu, then I found this from MDN: https://developer.mozilla.org/en-US/docs/Developer_Guide/Virtual_ARM_Linux_environment.

This article uses an old release by linaro which based on Ubuntu natty that can no longer be found on http://ports.ubuntu.com.
As Ubuntu says, armel would not be supported, that’s why the latest code name of ubuntu supporting armel is begin with ‘Q’.

I found another server release and a new nano, tried that with similar commands, notes are below:

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Virtualized ARM on Ubuntu by @sskaje: https://sskaje.me/2013/12/virtualized-arm-ubuntu/

Incoming search terms:

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wget 416 Requested Range Not Satisfiable

By @sskaje
Link: https://sskaje.me/2013/11/wget-416-requested-range-not-satisfiable/

I tried to use wget -crmmirroring http://archive.cloudera.com, but 416 Requested Range Not Satisfiable is reported when files have been updated.

The -c uses a range header to perform a partially download especially for incomplete download tasks, but if I want to replace old files with new ones, this is a bad choice.

wget provides an -m/–mirror, as it’s said in the manual, is the shorthand for ‘-r -l inf -N’, which means wget -m/–mirror is enough for mirroring sites.

wget 416 Requested Range Not Satisfiable by @sskaje: https://sskaje.me/2013/11/wget-416-requested-range-not-satisfiable/

nginx regex match server name and redirect

By @sskaje
Link: https://sskaje.me/2013/10/nginx-regex-match-server-name-and-redirect/

CNAME: sskaje.name => sskaje.me, *.sskaje.name => sskaje.name
HTTP redirect: http://xxx.sskaje.name/aaa/bbb => http://xxx.sskaje.me/aaa/bbb

server {
    server_name sskaje.name;
    rewrite ^(.*) http://sskaje.me$1 redirect;
}

server {
    server_name ~^(?<domain>.+).sskaje.name;
    rewrite ^(.*) http://$domain.sskaje.me$1 redirect;
}

server {

server_name sskaje.name;

rewrite ^(.*) http://sskaje.me$1 redirect;

}

server {

server_name ~^(?<domain>.+).sskaje.name;

rewrite ^(.*) http://$domain.sskaje.me$1 redirect;

}

nginx regex match server name and redirect by @sskaje: https://sskaje.me/2013/10/nginx-regex-match-server-name-and-redirect/

Create OS X Mavericks Bootable USB Drive from AppStore Release

By @sskaje
Link: https://sskaje.me/2013/10/create-os-x-mavericks-bootable-usb-drive-from-appstore-release/

1 Download Mavericks installer

Download from Mac App Store or anywhere.
The default folder name is ‘Install OS X Mavericks.app‘ not accessible directly from Mac Finder. There’s a DMG file locate at ‘Install OS X Mavericks.app/Contents/SharedSupport/InstallESD.dmg‘, this DMG contains all files we need.

2 Mount DMG directly from Terminal

Open Terminals,

hdiutil attach Install OS X Mavericks.app/Contents/SharedSupport/InstallESD.dmg

1	hdiutil attach Install OS X Mavericks.app/Contents/SharedSupport/InstallESD.dmg

The DMG will be mount at /Volumes/OS X Install ESD/

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Create OS X Mavericks Bootable USB Drive from AppStore Release by @sskaje: https://sskaje.me/2013/10/create-os-x-mavericks-bootable-usb-drive-from-appstore-release/