The Advanced Bash Scripting Guide is both a reference and a tutorial on shell scripting. This comprehensive book, the equivalent of 1,000+ print pages, covers almost every aspect of shell scripting. It contains 382 profusely commented illustrative examples, a number of tables, and a cross-linked index/glossary. Not just a shell scripting tutorial, this book also provides an introduction to basic programming techniques, such as sorting and recursion. Included scripts are the Game of Life, a Perquackey variant, a Morse code trainer, and an implementation of the Gronsfeld Cipher. This book is suited for both individual study and classroom use. It covers Bash, up to and including version 4.2. Note that users of miniaturized single-board computers running Linux, such as the Raspberry Pi and the Beagle Bone, would find this Guide useful for learning and running Bash scripts to explore and expand the capabilities of these small, but powerful machines.
ZABBIX is an enterprise-class distributed monitoring solution designed to monitor and track performance and availability of network servers, devices, and other IT resources. It supports distributed and Web-based monitoring, auto-discovery, real-time monitoring, SLA assurance, trending, and more.
Owl (Openwall GNU/*/Linux) is a small security-enhanced Linux distribution for servers. Owl also makes a good base system for customized virtual machine images and embedded systems, and Owl live CDs with remote SSH access are good for recovering or installing systems (whether with Owl or not). A single Owl CD includes the full live system, installable packages, the installer program, as well as full source code and the build environment capable of rebuilding the entire system from source. Owl supports multiple architectures (x86, x86-64, SPARC, and Alpha) and offers some compatibility for packages developed for other Linux distributions. The primary approaches to security are proactive source code review, privilege reduction, privilege separation, careful selection of third-party software, safe defaults, and "hardening" to reduce the likelihood of successful exploitation of security flaws.
FreeNIBS is a loadable plugin for the FreeRADIUS radius server. FreeNIBS provides authorization, authentication, and accounting for dial-in (PPP/PPPOE/PPTP) users. It can be used for real-time prepaid and postpaid billing. FreeNIBS can bill users based on service accuration, time, traffic, and both time and traffic. FreeNIBS has very flexible settings for groups, users, and prices. All data is stored in SQL databases such as MySQl, PgSQL, and Oracle.
ConfPoint is a distributed ontology-driven configuration tool for Linux services. It's meant to be a complete and integral instrument of easy administration of infrastructure servers for those who are not familiar with Linux internals. It consists of a server with plugins for each supported service and a graphical management console application that runs on Linux and Windows platforms. ConfPoint now supports DNS, DHCP, iptables, Samba, CUPS, and ACL management.
Squid Account Management System (SAMS) is a Web-based interface and tool to manage users of a squid proxy server. It can manage users' access to squid, prohibition of users' to access to specific URLs, rewriting of requested URLs to graphical resources, and delay pools for user groups. It can save and build reports of users' statistics.