Program and Resource Management |
Category |
Command |
Option |
Annotation |
Background Management |
& |
Command + & |
Move the task to the background |
Ctrl + z |
|
Pause a task |
Fg |
[% Number] |
When the background program is pushed to the foreground, the number indicates the process number. If no parameter is added, the latest process is pushed to the foreground. |
Jobs |
|
Query all background tasks |
System status monitoring |
Ps |
|
Displays the processes running in the current system. ps-aux = ps-ef indicates that all processes in the current system are displayed. |
-A (-e) |
All processes |
-U |
Show user |
-X |
List all tty Processes |
-F |
Complete display of Process Information |
W |
|
View the current system load. The displayed content is time, system running time, number of logged-in users, and average load. |
Vmsat |
|
Monitor the current system status. The displayed content is procs, memory, swap, io, system, and cpu. |
Procs (r, B) |
Displays process information. r: Number of processes running and waiting for cpu time slice. If the number of cpu is greater than the number of cpu for a long time, the cpu is insufficient. B: The number of processes waiting for resources, note that |
Memory |
Memory information; swpd: the number of memories in the SWAp partition. free: the number of idle memories. buff: the buffer size. cache: the cache size. |
Swap |
Memory switching si: Number of memory entries in the SWAp zone; so Number of memory entries in the SWAp Zone |
Io |
Disk usage; bi read disk bo write Disk |
System |
Display the number of interruptions during the collection Interval |
Cpu |
Display cpu usage status |
Top |
|
The resources occupied by the dynamic monitoring process are changed every 3 seconds. |
Free |
[Option] |
View memory usage |
-B (-k,-m) |
Unit with bytes (unit with kb and mb) |
-T |
Show total |
Netstat |
[Option] |
Display network conditions |
-Lnp |
Ports enabled by the current system |
- |
Used to display network connection status |
Ping |
[Option] Target |
Connection status between the test target and the Local Machine |
|
-C |
The number of tests specified by the user. If this parameter is not added, the test will continue endlessly and the crtl + c can be forcibly stopped. |
Kill |
[Option] PID or task number |
Used to stop or kill a process |
-1 |
Allow the process to re-read the configuration file |
-9 |
Force kill process or task |
-15 |
Stop a process |
Network Settings |
Ifconfig |
|
Displays IP information about the current NIC (subnet mask, gateway, etc) |
Device Name (such as eth0) |
View the NIC information of this device |
Device Name (such as eth0) + IP Address |
Configure an IP address for this Nic |
Device Name (such as eth0) + down = ifdown |
Disable eth0 Nic |
Device Name (such as eth0) + up = ifup |
Enable eth0 |
Service script |
Service |
Service Script Name Script Parameters |
For example, service network restart restarts the network service. |
Start/stop restart status |
|
Chkconfig |
|
View All background services |