Monit is a utility for managing and monitoring processes, files, directories, devices and network services on a Unix system. Monit conducts automatic maintenance and repair and can execute meaningful causal actions in error situations. monit supports: * Daemon mode - poll services at a specified interval * Group and manage groups of services, service dependencies * Logging - syslog or own logfile * Alert, start, stop and restart of services based on it's characteristics * MD5 and SHA1 checksums * Runtime Unix socket and TCP/IP port checking (tcp and udp) * Process status, timeout, memory and cpu usage, etc. * Device usage monitoring (inodes and space) * File monitoring (timestamp, checksum, permission, owner, etc.) * Directory monitoring (timestamp, permission, owner, etc.) * Remote network services monitoring (ping, response time, protocol, etc.) * System load average monitoring * Flexible and customizable email alert messages and notifications * Protocol verification such as HTTP, FTP, SMTP, POP, IMAP, NNTP, NTP, etc. * A HTTP interface with XML output option and many more features :) WWW: http://www.tildeslash.com/monit/