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Called regularly by cron, sadc does the monitoring and stores its measurements to files in the /var/log/sa/ folder. The sar client can be used to explore this data. System Activity Report ( sar ) is a Unix System V -derived system monitor command used to report on various system loads, including CPU activity, memory/paging, interrupts, device ...
inotify (inode notify) is a Linux kernel subsystem created by John McCutchan, which monitors changes to the filesystem, and reports those changes to applications.It can be used to automatically update directory views, reload configuration files, log changes, backup, synchronize, and upload.
This is particularly useful for monitoring log files. Ancient versions of tail poll the file every second by default but tail from the GNU coreutils as of version 7.5 support the inotify infrastructure introduced in Linux kernel version 2.6.13 in August 2005 which only check the file when is notified of changes by the kernel.
To display and monitor the collected logs one needs to use a client application or access the log file directly on the system. The basic command line tools are tail and grep. The log servers can be configured to send the logs over the network (in addition to the local files).
Open Source Tripwire is a free software security and data integrity tool for monitoring and alerting on specific file change(s) on a range of systems [2] [3] originally developed by Eugene H. Spafford and Gene Kim. [4]
Arm MAP, a performance profiler supporting Linux platforms.; AppDynamics, an application performance management solution [buzzword] for C/C++ applications via SDK.; AQtime Pro, a performance profiler and memory allocation debugger that can be integrated into Microsoft Visual Studio, and Embarcadero RAD Studio, or can run as a stand-alone application.
Prepackaged monitors include CPU Utilization Monitor, DNS Monitor, Directory Monitor, Disk Space Monitor, Log File Monitor, Memory Monitor, Network Monitor, Ping Monitor, Port Monitor, Script Monitor, Service Monitor, URL Monitor, URL List Monitor, URL Sequence Monitor, Web Server Monitor, WebLogic Application Server Monitor and threshold values.
Security Onion is a free and open Linux distribution for threat hunting, enterprise security monitoring, and log management. [2] Its first release was in 2009. [3]Security Onion combines various tools and technologies to provide a robust IDS solution, including: