how to cross compile openssl

http://openssl.6102.n7.nabble.com/cross-compiling-questions-td21307.html

how to escape $(dollor sign) in makefile

to escape $ sign in Makefile, you will have to use double dollor sign. i.e

$$ will be interpreted as "$"

sed search lines and comment out or uncomment

comment out..

             sed '/pattern/s/^/#/' 

uncomment out...
             sed '/pattern/s/^/# *//'

srpms introduction

http://www.rpm.org/max-rpm/s1-rpm-miscellania-srpms.html

http://crashcourse.ca/content/working-source-rpms-under-centos

echo '%_topdir %(echo $HOME)/rpmbuild' > ~/.rpmmacros

extract source rpms

1. rpm2cpio - Extract cpio archive from RPM Package Manager (RPM) package.
2. copy files to and from archives

rpm2cpio | cpio -id

ubuntu CTRL+ALT+F10

CLTRL+ALT+F10 - kill desktop
CTRL+ALT+F7 - restore desktop