Top Command Options for Admnistrators

There are lot of option with top command but some parameters which i found very useful are following :


1. Type top on terminal you will get interface something like :




So mostly What do we need to see??

Memory wise sorted processes
CPU utilization wise sorted process and 
The process name which is using the memory and the CPU Right?





So after entering the "top" command press following to sort process on memory basis or CPU basis

P –To sort by CPU utilization
M –To sort by RAM utilization
c –To display or hide command full path

For more option press Shift+o and you will get list of alphabets by pressing which you have output accordingly

Following are the options you will get by pressing Shift+o




Current Sort Field:  K  for window 1:Def
Select sort field via field letter, type any other key to return

  a: PID        = Process Id
  b: PPID       = Parent Process Pid
  c: RUSER      = Real user name
  d: UID        = User Id
  e: USER       = User Name
  f: GROUP      = Group Name
  g: TTY        = Controlling Tty
  h: PR         = Priority
  i: NI         = Nice value
  j: P          = Last used cpu (SMP)
* K: %CPU       = CPU usage
  l: TIME       = CPU Time
  m: TIME+      = CPU Time, hundredths
  n: %MEM       = Memory usage (RES)
  o: VIRT       = Virtual Image (kb)
  p: SWAP       = Swapped size (kb)
  q: RES        = Resident size (kb)
  r: CODE       = Code size (kb)
  s: DATA       = Data+Stack size (kb)
  t: SHR        = Shared Mem size (kb)
  u: nFLT       = Page Fault count
  v: nDRT       = Dirty Pages count
  w: S          = Process Status
  x: COMMAND    = Command name/line
  y: WCHAN      = Sleeping in Function
  z: Flags      = Task Flags <sched.h>

So accordingly choose what you like to do :) Hope that you know .. Just Kiddin :)