Common commands in Linux System (4) program and resource management, Common commands in linux

Common commands in Linux System (4) program and resource management, Common commands in linux

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