Monthly Archives: December 2015

20 pmap Commands Examples in Linux / UNIX | pmap Commands Tutorial

You can find the memory used by a program (process) by looking into /proc directory or using standard command such as ps or top. However, you must calculate all memory usage by hand i.e. add Shared Memory + mapped file + total virtual memory size of the process + Resident Set Size + non-swapped physical… Read More »

20 mpstat Commands Examples in Linux / UNIX | mpstat Commands Tutorial

If you are using SMP (Multiple CPU) system, use mpstat command to display the utilization of each CPU individually. mpstat Report processors related statistics which includes Collecting and displays performance statistics for all logical processors in the system.. This display CPU statistics of individual CPU (or) Core. How to install mpstat? 1. Ensure you are… Read More »

20 iostat Commands Examples in Linux / UNIX | iostat Commands Tutorial

iostat command is a command that used for monitoring system input/output device loading by observing the time the devices are active in relation to their average transfer rates. The iostat create reports that can be used to change system configuration to better balance the input/output between physical disks. You can use iostat command which report… Read More »

20 vmstat Commands Examples in Linux / UNIX | vmstat Commands Tutorials

vmstat – Report virtual memory statistics. vmstat is a tool that collects and reports data about your system’s memory, swap, and processor resource utilization in real time. It can be used to determine the root cause of performance and issues related to memory use. vmstat reports information about processes, memory, paging, block IO, traps, and… Read More »

20 Xargs Commands Examples in Linux / UNIX | Xargs Commands Tutorials

Under Development The xargs command is extremely useful when we combine it with other commands.This tutorials explains the usage of xargs command using few simple examples. 1. Xargs Basic Example The xargs command (by default) expects the input from stdin, and executes /bin/echo command over the input. When you execute xargs without any argument, or… Read More »

20 Mount and Unmount Filesystem / Partition commands in Linux / UNIX

Once you create a partition, you should use mount command to mount the partition into a mount point (a directory), to start using the filesystem. You need to add the -t FILESYSTEMTYPE argument to the command, replacing FILESYSTEMTYPE with your filesystem type.valid filesystem types are: auto – this is a special one. It will try… Read More »