Here is EduUnix.ccut.edu.cn/index/pdf,offering many freely available Linux and Unix programming and I.T.ebooks, in pdf format, in the following topics and categories:Networking, Snort, C++ Programming, Python Programming, JavaProgramming, JDBC, JavaBeans, Java RMI, JBoss, Tomcat, RubyProgramming, Perl, XML, XSLT, VPN, Linux Programming, Linux Security,Linux Networking, Linux System Administration, Debian Linux, Red HatRHCE, Apache, PHP, MySQL, Oracle 10g, […]

More: continued here