Linux command --- top

1. description of the process information area: Detailed description: Serial Number column name meaning aPID process idbPPID parent process idcRUSERRealusern

Serial Number	Column name	Description
A	PID	Process id
B	PPID	Parent process id
C	RUSER	Real user name
D	UID	User ID of the process owner
E	USER	User name of the process owner
F	GROUP	Group name of the process owner
G	TTY	The terminal name of the startup process. Processes not started from the terminal are displayed?
H	PR	Priority
I	NI	Nice value. A negative value indicates a high priority, and a positive value indicates a low priority.
J	P	The last CPU used is only meaningful in multiple CPU environments.
K	% CPU	CPU usage from the last update to the present
L	TIME	Total CPU time used by the process, in seconds
M	TIME +	Total CPU time used by the process, in 1/100 seconds
N	% MEM	Percentage of physical memory used by the process
O	VIRT	Total virtual memory used by the process, in kb. VIRT = SWAP + RES
P	SWAP	In the virtual memory used by the process, the swap size, in kb.
Q	RES	Physical memory used by the process, not swapped out, in kb. RES = CODE + DATA
R	CODE	Physical memory occupied by executable code, in kb
S	DATA	Physical memory occupied by parts other than executable code (data segment + stack), in kb
T	SHR	Size of shared memory, in kb
U	NFLT	Page error count
V	MCM T	The number of pages that have been modified since the last write to the present.
W	S	Process status. D = uninterrupted sleep R = run S = sleep T = tracking/stopping Z = Zombie process
X	COMMAND	Command name/command line
Y	WCHAN	If the process is sleeping, the system function name displayed in sleep
Z	Flags	Task flag, refer to sched. h

1.

Description of the process information area:

Detailed description:
2. commands in the command line.
1) field display management
Input f:

2) field order management
Enter the o key to change the column display sequence. A lower-case a-z can move the corresponding column to the right, while an upper-case A-Z can move the corresponding column to the left. Press Enter.
3) h help
4) 'd OR's: Set the display refresh interval
5) c: whether to display the complete path and program name when the process starts.
6) I: Switch to display idle tasks.
7) 'Z': change the color
'Z': Switch Color Display 8) u: Display the process of a specific user. 9) n: set the maximum number of tasks displayed. 10) 'K': End Task 11) 'A': switch to alternate display mode. this command classifies all commands into four types:
Def (default field Group)
Job (task field Group)
Mem (memory field Group)
Only one of the four windows in Usr (user field Group) is the current window, and only the current window is involved in the commands in the Command Line for interactive operations, use 'a' and 'W' to switch between the four windows.