A service (also called a daemon process) is software that runs on a computer, generally in the background. This is usually because it's something that the administrator isn't likely to interact with directly. Show
For instance, a network service runs at the application layer to provide some form of service over a network. It's expected that client computers will contact the service for access. A common example is the Apache web server. It runs on a system so that devices connected to the internet can view a specific set of files on a computer. Red Hat Enterprise Linux (RHEL) provides an environment where these network services can run. RHEL also provides a utility named systemd to help you manage these services. systemd has been the default service manager since RHEL 7.
It's the first thing that gets started (PID 1), and it is responsible for starting the rest of the system. It activates server daemons, system resources, and various other processes. With systemd, you can start, stop, and check the status of the network services running on your server. You interact with systemd by using the Start a serviceTo start a given service, use:
For example, to start the sshd service, type:
You can ignore [ Free cheat sheet: Get a list of Linux utilities and commands for managing servers and networks. ] List servicesYou can list all loaded services on a server with:
Stop a serviceTo stop a service, type:
To find out whether a service is running, inactive, enabled, disabled, or has exited, use:
The
This command gives two possible outputs. The service is either Enable a serviceYou can configure a service to start automatically with the system so that you don't have to start it manually after the server reboots or restarts. To enable a service, which means the service starts automatically when the server boots, use:
To both start and enable a service, add the
To check whether a service is enabled, enter:
When a service is enabled, it starts automatically at boot. When it's disabled, it doesn't start automatically at boot. [ Free download: Advanced Linux commands cheat sheet. ] Disable a serviceTo disable a service, so the service will not start automatically at boot time, run:
Wrap upNot everything uses Systemd is full of features, and the Updated: 12/30/2021 by The net command is used to update or fix a network or view its settings. Net is an
external command that is available for the following Microsoft operating systems as net.exe. [/FORCELOGOFF:{minutes | NO}] [/MINPWLEN:length] \\computername {/ADD | /DEL} [SERVER | WORKSTATION] [service] [id [/CLOSE]] [groupname [/COMMENT:"text"]] [/DOMAIN] [groupname [/COMMENT:"text"]] [/DOMAIN] [name [/ADD | /DELETE]] [service] [\\computername] [/DELETE] sharename [service] [WORKSTATION | SERVER] service [\\computername | /DOMAIN[:domainname] | /RTSDOMAIN[:domainname]] [/SET] [devicename | *] [\\computername\sharename[\volume] [password | *]] NET USE {devicename | *} [password | *] /HOME NET USE [/PERSISTENT:{YES | NO}] [username [password | *] [options]] [/DOMAIN] [\\computername [/CACHE] | /DOMAIN[:domainname]] NET [ ACCOUNTS | COMPUTER | CONFIG | CONTINUE | FILE | GROUP | HELP | HELPMSG | LOCALGROUP | NAME | PAUSE | PRINT | SEND | SESSION | SHARE | START | STATISTICS | STOP | TIME | USE | USER | VIEW ] [/FORCELOGOFF:{minutes | NO}] [/MINPWLEN:length] \\computername {/ADD | /DEL} [SERVER | WORKSTATION] [service] [id [/CLOSE]] [groupname [/COMMENT:"text"]] [/DOMAIN] [groupname [/COMMENT:"text"]] [/DOMAIN] [name [/ADD | /DELETE]] [service] \\computername\sharename You can send a message only to a name that is active on the network. If the message is sent to a username, that user must be logged on and running the Messenger service to receive the message. {name | * | /DOMAIN[:name] | /USERS} message [\\computername] [/DELETE] sharename [service] [WORKSTATION | SERVER] service [\\computername | /DOMAIN[:domainname] | /RTSDOMAIN[:domainname]] [/SET] [devicename | *] [\\computername\sharename[\volume] [password | *]] NET USE {devicename | *} [password | *] /HOME NET USE [/PERSISTENT:{YES | NO}] [username [password | *] [options]] [/DOMAIN] [\\computername [/CACHE] | /DOMAIN[:domainname]] Windows 2000 syntax NET [ CONFIG | DIAG | HELP | INIT | LOGOFF | LOGON | PASSWORD | PRINT | SEND | SHARE | START | STOP | TIME | USE | VER | VIEW ] NET CONFIG [/YES] NET DIAGNOSTICS [/NAMES | /STATUS] command /? NET INITIALIZE [/DYNAMIC] NET LOGOFF [/YES] NET LOGON [user [password | ?]] [/DOMAIN:name] [/YES] [/SAVEPW:NO] NET PASSWORD [oldpassword [newpassword]] NET PRINT \\computer[\printer] | port [/YES] Sends messages to other users, computers, or messaging names on the network. The Messenger service must be running to receive messages. You can send a message only to a name that is active on the network. If the message is sent to a username, that user must be logged on and running the Messenger service to receive the message. NET START [BASIC | NWREDIR | WORKSTATION | NETBIND | NETBEUI | NWLINK] [/LIST] [/YES] [/VERBOSE] To start the workgroup redirector you selected during setup, type NET START without options. In general, you don't need to use any of the options. NET STOP [BASIC | NWREDIR | WORKSTATION | NETBEUI | NWLINK] [/YES] To stop the workgroup redirector, type NET STOP without options. This command breaks all your connections to shared resources and removes the NET commands from your computer's memory. NET TIME [\\computer | /WORKGROUP:wgname] [/SET] [/YES] NET USE [drive: | *] [\\computer\directory [password | ?]] NET USE drive: | \\computer\directory /DELETE [/YES] NET USE drive: | * /HOME NET VER NET VIEW [\\computer] [/YES] Map the Z: drive to the network path //computer/folder. Send a text message to the computer with a hostname of mrhope the message There is hope!. Note This command only works in Windows versions that support it. Tip Today's computers
disable the messenger service. If this service is disabled, you cannot send or receive net send messages. If you need to use this service, follow the instructions on this page and choose to enable the service instead of disabling it. Note New versions of Windows no longer support the net send command. Instead, use the msg command. The command above would send
"Hello everyone!" to all users in your current domain. Note Used this command with caution. On a school or corporate network, any computer with the Messenger service enabled could receive the message. Display additional information about the network such as the computer's name, workgroup, logon domain, DNS, and other useful information. To view the available computers and their shared resources, you may use either of the
commands below. The first example displays available computers. The last command would display the shared resources on the hope computer. Display all groups currently setup on the computer. Display all network shares on your computer. Create a share called "hope" for the "c:\hope\files" directory. Which Net command is used to sets password and logon requirements for users?The net accounts command is used to set password and logon requirements for users. For example, the net accounts command can be used to set the minimum number of characters that users can set their password to.
What utility is available on a Windows PC to view current running applications and processes?Task List Viewer (TList), or tlist.exe, is a command-line utility that displays the list of tasks, or user-mode processes, currently running on the local computer.
What is the computer operating system utility command that allows a user to manually query the DNS servers configured on the device to resolve a given hostname?Nslookup is a computer operating system utility that allows a user to manually query the DNS servers configured on the device to resolve a given host name. This utility can also be used to troubleshoot name resolution issues and to verify the current status of the name servers.
Which Windows tool selectively denies traffic to a computer or network segment?A firewall is a computer network security system that restricts internet traffic in, out, or within a private network. This software or dedicated hardware-software unit functions by selectively blocking or allowing data packets.
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