MultiTail lets you view one or multiple files like the original tail program. The difference is that it creates multiple windows on your console (with ncurses). Merging of 2 or more log files is possible. It can also use colors while displaying the log files (through regular expressions) for faster recognition of what is important. It can also filter lines (again with regular expressions). It has interactive menus for editing given regular expressions and deleting and adding windows. One can also have windows with the output of shell scripts and other software. When viewing the output of external software, MultiTail can mimic the functionality of tools like 'watch'.
Monit is a utility for managing and monitoring processes, programs, files, directories, and devices on a Unix system. It conducts automatic maintenance and repair and can execute meaningful causal actions in error situations. It can be used to monitor files, directories, and devices for changes, such as timestamps changes, checksum changes, or size changes. It is controlled via an easy to configure control file based on a free-format, token-oriented syntax. It logs to syslog or to its own log file and notifies users about error conditions via customizable alert messages. It can perform various TCP/IP network checks, protocol checks, and can utilize SSL for such checks. It provides an HTTP(S) interface for access.
SecurityFocus ARIS Extractor is a sophisticated Intrusion Detection System (IDS) log analyzer and reporting system, integrated with the SecurityFocus ARIS web site. It allows administrators to upload Intrusion Detection System (IDS) logs to the SecurityFocus ARIS Web site, producing sophisticated reporting, and research attacks and events. By filtering out insignificant or benign data and converting it to a common (XML) format, ARIS extractor streamlines incident reporting for both security professionals and home users, allowing IDS operators to focus only on relevant attacks and incidents. It allows you to analyze and archive logged incidents, cross reference incidents/attacks with the SecurityFocus Vulnerability Database, look up contact information for offending IP addresses, generate personal incident statistics and reports, automatically identify and report important incidents, reduce the amount of time spent parsing IDS logs, and generate daily summary reports, delivered by email (optional). All of this is done without revealing any information that could be used to discern your identity. It can be configured to obfuscate IP addresses, names, and other pertinent details before submitting them to the ARIS Analyzer web site. It supports Snort, Cisco Secure IDS, Dragon, NetProwler, RealSecure, BlackICE Defender, and ICEPac.
The DAP daemon runs entirely as a non-privileged user and sends regular updates of the server status to a specified set of peers in a cluster. You can specify any number of information elements, such as uptime, networkdevice counters (packet/octet), logged in users (via utmp), load averages, and memory/swap usage.