Tutorial of using PS command and gitps command in Linux system

ps

PS [- aacdefhjlmnvwy] [acefghlnrsstuvxx] [- C < instruction name >] [- G < group name >]

[- G < group ID >] [- P < process ID >] [- s < phase job >]

[- T < terminal number >] [T < terminal number >] [- U < user ID code >] [- U < user ID code >]

[U < user name >] [- < process ID >] [– cols < characters per column >]

[– columns < characters per column >] [– cumulative] [– deselect] [– forest]

[– headers] [– help] [– info] [– lines < display columns >] [– no headers]

[– group < group name >] [- group < group ID >] [– PID < process ID >]

[– rows < number of display columns >] [– Sid < phase job >] [– TTY < terminal number >]

[– user < user name >] [– user < user ID >] [– version]

[– width < characters per column >]

Parameter Description:

– a shows the progress executed under all terminals except the phase operation leader.
A. display all processes under the current terminal, including those of other users.
– a shows all processes.
– C displays the CLS and PRI fields.
C. when the process is listed, the actual instruction name of each process will be displayed, without path, parameter or resident service identification.
– C < instruction name > specifies the name of the execution instruction and lists the status of the process that executed the instruction.
– D shows all processes, but does not include the process of the phase job leader.
– e this parameter has the same effect as specifying the “a” parameter.
E when listing processes, displays the environment variables used by each process.
– f displays the uid, PPIP, C, and stime fields.
F displays the tree structure with ASCII characters to express the relationship between processes.
– G < group name > this parameter has the same effect as the “- G” parameter. It can also be specified by the name of the phase operation leader.
G shows all processes under the current terminal, including the process of group leader.
– G < group ID > list the status of the processes belonging to the group, or use the group name to specify.
H do not display the title column.
– H displays a tree structure representing the relationships between processes.
– J or j displays the process status in the format of work control.
– L or l displays the process status in a detailed format.
L lists information about the field.
– m or m shows all threads.
N number the user and wchan fields.
– N shows all processes except those under the PS instruction terminal.
– P < process ID > specifies the process ID and lists the status of the process.
P < process ID > the effect of this parameter is the same as the specified “- P” parameter, only slightly different in list format.
R only processes with row terminals running are listed.
– s < phase job > specifies the process ID of the phase job and lists the status of the process that belongs to the phase job.
S displays the process status in the format of process signal.
S lists the process, including the data of the interrupted subprocesses.
– T < terminal number > specifies the terminal number and lists the status of the processes belonging to that terminal.
T < terminal No. > the effect of this parameter is the same as the specified “- t” parameter, only slightly different in list format.
– t shows all processes under the current terminal.
– U < user ID > this parameter has the same effect as the “- U” parameter specified.
U displays the process status in a user-oriented format.
– U < user ID > lists the status of the processes belonging to the user, which can also be specified by the user name.
U < user name > lists the status of the processes that belong to that user.
V displays the process status in the form of virtual memory.
– V or V displays version information.
– W or W displays the process status in a wide format. 　
X shows all processes, not distinguished by terminals.
X uses the old Linux i386 login format to display the process status.
When – y is used with the parameter “- L”, the f (flag) field is not displayed, and the addr field is replaced by the RSS field
– < process ID > this parameter has the same effect as the specified “P” parameter.
— cols < characters per column > set the maximum characters per column.
— columns < characters per column > this parameter has the same effect as the “- columns” parameter.
— cumulative this parameter has the same effect as the specified “s” parameter.
— deselect this parameter has the same effect as the specified “- n” parameter.
— forest this parameter has the same effect as the specified “F” parameter.
— headers repeat the header column.
— help online help.
— info displays troubleshooting information.
— lines < number of display columns > set the number of columns in the display screen.
— no headers the effect of this parameter is the same as that of the specified “H” parameter, only slightly different in list format.
— group < group name > this parameter has the same effect as the specified “- G” parameter.
— group < group ID > this parameter has the same effect as the specified “- G” parameter.
— PID < process ID > this parameter has the same effect as the specified “- P” parameter.
— rows < display columns > this parameter has the same effect as the “- lines” parameter.
— Sid < phase job > this parameter has the same effect as the “- s” parameter specified.
— TTY < terminal number > this parameter has the same effect as the “- t” parameter specified.
— user < user name > this parameter has the same effect as the specified “- U” parameter.
— user < user ID > this parameter has the same effect as the specified “- U” parameter.
— version this parameter has the same effect as the specified “- V” parameter.
— width < characters per column > this parameter has the same effect as the “- cols” parameter specified.

Example 1

Example 2

Example 3

Example 4

Example 5

gitps

The gitps command is used to display the process status and has a visual interface, which is more convenient for operation

A show all process information
C shows only the real name of the process
E display environment variables
F shows the relationship between processes
N in figures
V display in the form of virtual memory
X terminal insensitive

U < user > specify user
P < process No. > specify process
T < terminal > designated terminal

Example: