service | 易学教程

CentOS7关闭防火墙方法

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在之前的版本中关闭防火墙等服务的命令是 service iptables stop /etc/init.d/iptables stop 在RHEL7中,其实没有这个服务 [root@rhel7 ~]# cat /etc/redhat-release Red Hat Enterprise Linux Server release 7.0 (Maipo) [root@rhel7 ~]# service iptables stop Redirecting to /bin/systemctl stop iptables.service [root@rhel7 ~]# /etc/init.d/iptables stop -bash: /etc/init.d/iptables: No such file or directory 原来在RHEL7开始，使用systemctl工具来管理服务程序，包括了service和chkconfig [root@rhel7 ~]# systemctl list-unit-files|grep enabled cups.path enabled abrt-ccpp.service enabled abrt-oops.service enabled abrt-vmcore.service enabled abrt-xorg.service enabled

CentOS7关闭防火墙方法

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Understanding IServiceProvider and QueryService

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问题 Can anyone explain the idea behind IServiceProvider and QueryService ? I don't understand what a service is and how it differs from another type of object or interface. I've seen little explanation--mainly some remarks here and here on MSDN, but I don't understand them. Why would you have IServiceProvider and QueryService instead of just having some sort of "GetAnotherObject" method? Thanks for any guidance. 来源： https://stackoverflow.com/questions/59432866/understanding-iserviceprovider-and

How can i keep the job service running when the app is closed from recent task list by user

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问题 I am using Job Scheduler API in my app to schedule a job for me after specific time interval. It runs fine when the app is running. But whenever the user closes the app or clears it from the recent task list the app stops and the scheduled job never executes afterwards until you open the app and it is rescheduled again from the time it is opened. Now i want someone to help me to keep the jobs on executing even if the app is closed or cleared from the recent task list. If there is any

GPS Location on Service - Android [duplicate]

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问题 This question already exists : Closed 7 years ago . Possible Duplicate: requestLocationUpdates throws exception I'm trying to create a service that when the server ask me, send my location. but can not find the way to do it, since everything is a background service. and I do not need to have UI interface. when I call requestUpdate () throws me an error and stops the application locManager.requestLocationUpdates( LocationManager.GPS_PROVIDER, 15000, 0, locationListener); runException Can't

How does Visual Studio 2008 and svcutil decide which types to re-use from referenced assemblies when generating a web service proxy class?

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问题 I need to know how does svcutil and Visual Studio decide which types can be re-used from referenced assemblies when generating a web service proxy class. I have an assembly with some types that are declared like this: namespace MYCOMPANY.BO.Accounting { [Serializable, DataContract] public class AccountingPackagePutRequest : Request { // Fields [DataMember] public IBooking[] bookings; [DataMember] public IDocument[] documents; // Methods public AccountingPackagePutRequest(); } } Now I have an

how to parse a json file when starts with

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问题 I want to parse the following JSON file but is starting with [ indicating to me that is an array, and then continues with { objects, my current parser is returning a JSON object. My question is: how to modify the parser to parse this file? So that the parser will serve me for other JSON files, starting with objects or arrangements. JSON FILE: [{"codigo":1,"contenido":[{"codigo":1,"descripcion":"Lomo completo"},{"codigo":2,"descripcion":"Cerveza 1 Lt."}],"descripcion":"1 lomo completo y 1

Limiting graphs to be used by Factforge sparql endpoint

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问题 Using http://www.sparql.org/sparql.html to run this query prefix oxprop: <http://ophileon.com/ox/property#> prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> prefix owl: <http://www.w3.org/2002/07/owl#> prefix wgs84_pos: <http://www.w3.org/2003/01/geo/wgs84_pos#> prefix gn: <http://www.geonames.org/ontology#> select * from <http://www.ophileon.com/ox/poi.rdf> where { ?poi rdfs:label ?poiname. ?poi owl:sameAs ?geonameuri. SERVICE <http://factforge.net/sparql>{ ?geonameuri gn:population

How do I retrieve shared preferences data in a Widget Service class without passing in incorrect default values or getting null pointer errors?

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问题 I am trying to run a widget in my app. The widget data (sync frequency, username, etc) is decided in the WidgetConfig class. It then opens a widget provider, which creates the widget, and lastly a service updates the views and makes the server calls to update data. Here is some of my code: //First Widget config is called: public class WidgetConfig extends Activity{ //Stuff happens here to get data from EditTexts and spinners and converts //them to strings. //Eventually a button is pressed

How do I retrieve shared preferences data in a Widget Service class without passing in incorrect default values or getting null pointer errors?

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