How do you understand top command?
S – indicates the status of the process: S=sleep R=running Z=zombie (S) %CPU – This is the percentage of CPU used by this process (0.3) %MEM – This is the percentage of RAM used by the process (0.7) TIME+ –This is the total time of activity of this process (0:17.75)
What does Top output mean?
“Top” displays system summary information and a list of all processes and threads currently being managed by the Linux kernel. … It is also an interactive program, meaning that the output can be customized and manipulated while it’s running.
Does top show all processes?
1 Answer. Top only displays the most cpu heavy tasks, take a look at the documentation.
What is virt in top command?
VIRT stands for the virtual size of a process, which is the sum of memory it is actually using, memory it has mapped into itself (for instance the video card’s RAM for the X server), files on disk that have been mapped into it (most notably shared libraries), and memory shared with other processes.
What does netstat command do in Linux?
The network statistics ( netstat ) command is a networking tool used for troubleshooting and configuration, that can also serve as a monitoring tool for connections over the network. Both incoming and outgoing connections, routing tables, port listening, and usage statistics are common uses for this command.
What is WA in top command output?
%wa – this is iowait percentage. When a process or program requests some data, it first checks the processor caches (there are 2 or three caches there), then goes out and checks memory, and finally will hit disk.
What is the nice value in Linux?
In Linux system priorities are 0 to 139 in which 0 to 99 for real-time and 100 to 139 for users. Nice value — Nice values are user-space values that we can use to control the priority of a process. The nice value range is -20 to +19 where -20 is highest, 0 default and +19 is lowest.
How do you read the top command output?
How to Read Linux Top Command Output and Uses
- The Row 1 results show about server uptime from the last reboot, currently logged in users and CPU load on the server. …
- Row 4 shows the memory utilization on the server, you can find here how much memory is used, the same results you can find using free command.
How do I find the top 10 processes in Linux?
The ps command command displays every process ( -e ) with a user-defined format ( -o pcpu ). First field is pcpu (cpu utilization). It is sorted in reverse order to display top 10 CPU eating process.
How do I list all processes in Linux?
Check running process in Linux
- Open the terminal window on Linux.
- For remote Linux server use the ssh command for log in purpose.
- Type the ps aux command to see all running process in Linux.
- Alternatively, you can issue the top command or htop command to view running process in Linux.
How do I find the top process in Linux?
The Linux ‘top’ command is the best and widely used command that everyone uses to monitor Linux system performance. It displays a real-time view of the system processes running on the interactive interface. You should run the top command in batch mode to identify top memory consuming processes in Linux.