The Logfile Navigator, lnav for short, is a curses-based tool for viewing and analyzing log files. The value added by lnav over text viewers or editors is that it takes advantage of any semantic information that can be gleaned from the log file, such as timestamps and log levels. Using this extra semantic information, lnav can do things like interleaving messages from different files, generate histograms of messages over time, and provide hotkeys for navigating through the file. These features a
Pimp my Log is a prettifying log viewer for web servers. It's written in PHP, understands Apache, NGINC, IIS webserver logs, but also PHP, sshd, Tomcat, RoR and syslogs. It can render any text source, multi-line logs, supports major browsers, provides desktop tail and rotation notifications, can search and filter logs, by regex even, sort entries, mark and hide columns, works with large files. It's easy to set up due to its initial auto-configuration, still allows overriding settings, and is l
SSHGuard is an automated log watcher which quickly sets up firewall blocks for detected brute-force attacks. It supports not just SSH, but also sendmail, exim, dovecot, Cucipop, UWimap, vsftpd, proftpd, pure-ftpd and FreeBSD ftpd. It understands syslog/-ng, metalog, multilog and raw log formats. And works with netfilter/iptables, PF, ipfw, or just hosts.allow to set up firewalling rules.
Elogviewer provides a convenient browser for "elogs" as used by Gentoos portage system. It's implemented in Python atop Qt4/Qt5.
Webfwlog is a Web-based firewall log reporting and analysis tool. It allows users to design reports to use on logged firewall data in whatever configuration they desire. Included are sample reports as a starting point. Reports can be sorted with a single click, or "drilled-down" all the way to the packet level, and saved for later use. Supported log formats are netfilter, ipfilter, ipfw, ipchains, Cisco routers, Snort, and Windows XP. Netfilter support includes ulogd MySQL or PostgreSQL database