Htop

The Power-User's Guide to htop

The Power-User's Guide to htop
  1. How do you use Htop?
  2. How do you read Htop output?
  3. What does S mean in Htop?
  4. What does D mean in Htop?
  5. Why does Htop show multiple processes?
  6. What is difference between top and Htop?
  7. How do I save Htop output?
  8. What do the colors mean in Htop?
  9. How do you sort memory by top command?
  10. What is nice in Htop?
  11. What does Virt mean in top?
  12. What is virt in top command?

How do you use Htop?

Use htop like a pro:

  1. Scroll the process list horizontally and vertically using the arrow keys.
  2. Kill a process by pressing the F9' key.
  3. Renice a process by pressing the 'F7' or 'F8' key's.
  4. List open files used by a process by pressing the 'l' key.
  5. Display only processes of a single user by pressing the 'u' key.

How do you read Htop output?

Understanding CPU Usage in htop

  1. Blue: Display percentage of CPU used by low priority processes. ( ...
  2. Green: Displays percentage of CPU used for processes owned by normal users.
  3. Red: Displays percentage of CPU used by system processes.
  4. Orange: Displays percentage of CPU used by IRQ time.

What does S mean in Htop?

Process user. Process state. R - running or runnable (on run queue) S - interruptible sleep (waiting for an event to complete)

What does D mean in Htop?

D state code means that process is in uninterruptible sleep.

Why does Htop show multiple processes?

htop shows individual threads as separate processes by default, similarly to how ps -AL would. If you press capital H it will switch to only showing the main processes (pressing it again switches back). Each thread's summary information actually reflects the whole process, so they don't have separate memory counts etc.

What is difference between top and Htop?

top is the default command-line utility that comes pre-installed on Linux distributions and Unix-like operating systems. ... htop is interactive process-viewer and process-manager for Linux and Unix-like operating system based on ncurses. If you take top and put it on steroids, you get htop.

How do I save Htop output?

  1. 5 Answers. Active Oldest Votes. This answer is useful. This answer is not useful. ...
  2. save terminal output to file. echo | htop > /tmp/htop.out. //htop.out has terminal save/load console_sequence.
  3. show output in terminal. head -c -10 /tmp/htop.out | tail -c +10. // just use head & tail strip the screen reset console_sequence.

What do the colors mean in Htop?

Press h inside htop for quick help. CPU Blue : Low-priority threads Green : Normal priority threads Red : Kernel threads Turquoise : Virtualization threads. Memory Green : Used memory Blue : Buffers Yellow/Orange : Cache.

How do you sort memory by top command?

9 Answers

  1. press shift + m after running the top command.
  2. or you can interactively choose which column to sort on. press Shift + f to enter the interactive menu. press the up or down arrow until the %MEM choice is highlighted. press s to select %MEM choice. press enter to save your selection.

What is nice in Htop?

The nice command can be used to start a process with a nice value specified by the user. This basically alters the actual priority assigned by the kernel. By default, htop runs with a nice value of 0 . It must be duly noted that to run a command with nice value less than 0, the root permissions are necessary.

What does Virt mean in top?

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 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.

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