This makes it easy to identify programs that have gone wild and are suddenly taking up your bandwidth. If there’s suddenly a lot of network traffic, you can fire up NetHogs and immediately see which PID is causing this. NetHogs does not rely on a special kernel module to be loaded. Instead of breaking the traffic down per protocol or per subnet, like most tools do, it groups bandwidth by process. It is designed as an alternative to the Unix program top. The htop program is an interactive system-monitor process-viewer and process-manager. The same as TIME, but reflecting more granularity through hundredths of a second. Total CPU time the task has used since it started. A task’s currently resident share of available physical memory. The task’s share of the elapsed CPU time since the last screen update, expressed as a percentage of total CPU time. A subset of resident memory (RES) that may be used by other processes. It includes all code, data and shared libraries plus pages that have been swapped out and pages that have been mapped but not used. The total amount of virtual memory used by the task. A negative nice value means higher priority, whereas a positive nice value means lower priority. USER: the effective username of task’s owner.
This is one of my favorite tools in Unix/Linux. It can display system summary information as well as a list of processes or threads currently being managed by the Linux kernel. The top program provides a dynamic real-time view of a running system.
ESS and other disk subsystem - AIX only.Machine details, CPU and OS specification.Network I/O rates, transfers, and read/write ratios.Disks I/O rates, transfers, and read/write ratios.It can output the data on screen or save the data to a comma separated file. This free tool gives you a huge amount of important performance information in one go. Nigel Griffiths in the creator and developer for the first two decades years.
This article lists some useful monitoring tools in Linux.
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