View and delete processes in Linux

1. after 1-2 characters are entered on the LINUX Command platform, pressing the Tab key will automatically complete the following parts (the premise is that you have this thing, for example, when tomcat is installed, enter tomcat to tab ).
2. The ps command is used to view the currently running process.
Grep is search
Example: ps-ef | grep java
Displays information about java CMD processes in all processes.
Ps-aux | grep java
-Aux: Show All statuses
Ps
3. The kill command is used to terminate the process.
Example: kill-9 [PID]
-9 indicates that the process is forced to stop immediately.
You can use ps to view the process PID and kill to terminate the process.
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1. ps Overview
Ps command is a very powerful process view command in the most fundamental circumstances. this command can be used to determine which processes are in the running and running status, whether the process is terminated, whether the process is dead, and which processes occupy excessive resources. in short, most of the information can be obtained by executing this command.
2. ps command and its parameters
Ps commands are most often used to monitor the working conditions of background processes because background processes do not have standard input/output settings such as the screen keyboard.
To detect the situation, you can use the ps command.
The syntax of this command is as follows:
Ps [Option]
-E: displays all processes and environment variables.
-F full format
-H: No title is displayed.
-L long format
-W width output
A
Display All processes on the terminal, including those of other users
R
Only processes in the running state are displayed.
X
Show no terminal processes under control
O [+ |-] k1 [, [+ |-] k2 [,…] The process list is displayed in the multi-level sorting order specified by the shortcut KEYS in short keys, k1, and k2.
The default sequence is specified for different ps formats. these default sequence can be overwritten by user-specified. here, the "+" character is optional, and the "-" character is used to reverse the specified key direction.
Pids lists only process identifiers separated by commas (,). The process list must be followed by the last option of the command line parameter. spaces cannot be inserted in the list. For example, ps-f1.
The following describes long command line options. These options start:
-- Sort X [+ |-] key [, [+ |-] key [,…] Select a multiple KEYS from the sort keys segment. the "+" character is optional, because the default direction is in ascending order of numbers or dictionary order. for example, ps-jax-sort = uid,-ppid, + pid.
-- Help: displays help information.
-- Version: displays the local version of the command.
The sort key is mentioned in the preceding option description. Next, we will further describe the sort key. note that the land use value in the sorting operation is the internal value of the ps application, not only the pseudo value in some output formats. the sorting Key List is shown in Table 4-3.
Table 4-3 sorting Key List
C
Cmd
Executable simple name
C
Cmdline
Complete command line
F
Flags
Long MODE flag
G
Pgrp
Process location group ID
G
Tpgid
Control tty Process Group ID
J
Cutime
Cumulative user time
J
Cstime
Accumulative system time
K
Utime
User time
K
Stime
System time
M
Min_flt
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