Summary of common commands for Linux systems (iv) procedures and resource management

Program and Resource Management
Classification	Command	Options	Annotations
Background management	&	command+&	Put a task in the background
	CTRL + Z		Pausing a task
	Fg	[%number]	The background program is pushed to the foreground, number represents the process numbers, and no parameter indicates that the most recent process is pushed to the foreground
	Jobs		Query all background tasks
System Status Monitoring	Ps		Displays the processes running on the current system, PS-AUX=PS-EF, all of which represent all current processes of the system
		-A (-e)	All processes
		-U	Show Users
		-X	List all TTY processes
		-F	Full display of process information
	W		View current system load, display the content in order: time, System run time, number of logged on users, average load
	Vmsat		Monitor the current system status and display the contents in turn procs,memory,swap,io,system,cpu
		Procs (R,B)	Show process-related information; R: The number of processes running and waiting for CPU time slices, if the long-term is greater than the number of CPUs, it indicates that the CPU is not enough; B: Indicates the number of processes waiting for a resource, if long-term greater than 1 requires attention
		Memory	memory-related information; SWPD: Amount of memory switched to the swap partition free: Amount of memory currently idle buff: Buffer size cache: Buffer size
		Swap	Memory Exchange Situation SI: The number of memory into the swap area; So the amount of memory entered by the swap zone
		Io	disk usage; Bi Read disk Bo write disk
		System	Shows the number of interrupts that occurred during the acquisition interval
		Cpu	Displaying CPU usage and loading state
	Top		Dynamically monitor the resources of the system, changing every 3 seconds
	Free	Options	View Memory usage
		-B (-K,-M)	Units in bytes (in KB,MB units)
		-T	Show total Totals
	Netstat	Options	Show Network status
		-lnp	Which ports are currently enabled on the system
		-an	Used to display network connection status
	Ping	[Options] Target	Test the connection status of the target to the local machine
		-C	User-specified test how many times, if not add, will be endless testing, can be crtl+c forcibly stop
	Kill	Options PID or task number	Used to stop or kill a process
		-1	Let the process read the configuration file again
		-9	Force a process or task to be killed
		-15	Stop process
Network settings	Ifconfig		Displays IP-related information for the current network card (subnet mask, gateway, etc.)
		Device name (e.g. eth0)	View network card information for this device
		Device name (such as eth0) +ip address	Configure the IP address for the NIC
		Device name (such as eth0) +down=ifdown	Disabling the eth0 NIC
		Device name (such as eth0) +up=ifup	Enable Eth0
Service scripts	Service	Service Script Name script parameter	Restart network services such as service network restart
		Start/stop Restart Status
	Chkconfig		View all back-office services

Summary of common commands for Linux systems (iv) procedures and resource management