The Advanced Bash Scripting Guide is both a reference and a tutorial on shell scripting. This comprehensive book, the equivalent of 1,032 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.
TrinityOS is a step-by-step, example-driven HOWTO on building a very functional Linux box with strong security in mind. TrinityOS is well known for its strong packet firewall ruleset, Chrooted and Split DNS (v9 and v8), secured Sendmail (8.x), Linux PPTP, Serial consoles and Reverse TELNET, DHCPd, SSHd, UPSes, system performance tuning, the automated TrinityOS-Security implementation scripts, and much more.
The Header and Envelope rewrite mini-HOWTO explains how to rewrite your from address differently in the mail header and the mail envelope. This may be necessary, for example, if your ISP requires you to send mail with one address, but you are subscribed to mailing lists with a different address, or want others to see a forwarding address instead of your ISP's address.
DB Visual Architect (DBVA) is a powerful tool that provides support for Object Relational Mapping (ORM) and Entity Relationship Diagrams (ERD), which assist with realizing UML designs as relational database implementations. By drawing a class diagram for the system, you can generate the required database tables and persistent source code for database manipulation. It can also be used with existing software.
Murdoc is a system for documenting system management departments. All documents of a system management department can be put in Murdoc for convenient browsing and searching. It comes with several tools for creating content, like a Unix documenter (for automatically documenting Unix servers on a daily basis), a Windows documenter (for automatically documenting Microsoft Windows servers on a daily basis), and a Logbook writer (for entering logbook entries by the system administrators). A searching feature is included.
systeminfo.sh is a system information gathering script for Linux. It is non-intrusive and simply gathers information from commands that are already available. It outputs a single file or generates a menu driven Web page. The information includes hostname, software packages, memory, OS information, process information, kernel modules, network routes, socket ports, ulimits, chkconfig, hardware devices, swap, disks, DNS info, top, processor, meminfo, dmesg, cron jobs, network interfaces, and more.