Introduction to Linux system services

Introduction to Linux system services

In a Windows system, we can open Task Manager to open or close some services. There are also requirements under Linux, so how does Linux open "task Manager" like Windows?

There are two ways to tune service startup and non-booting under Linux systems:

1. NTSYSV command

If this command does not exist

Yum Install-y Ntsysv

After installation, the following is done:

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After entering this interface, space bar to change * and empty, empty means not to start

Turn off some of the less frequently used services

Disable:

Atd

Auditd

Haldaemon

Ip6tables

Mdmonitor

Massagebus

Netfs

Nfslock

Postfix

Rpcbind

Rpcgssd

Udev-post

TAB key to determine

Complete the adjustment service list, and you must restart the system if you want to take effect !!

2. chkconfig--list

Note: The chkconfig command changes the service can be effective on the spot without rebooting the system!!

List what services you have, as shown in:

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3. Example

If you want the Crond service to not start

Chkconfig Crond off

Chkconfig--list Crond

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Note: The meaning of the 0 to 6 representation here is RunLevel Run Level

(0 shutdown, 1 single user off, multi-user mode 2,3 off, 4 reserved off, 5 graphical interface off, 6 restart off)

Chkconfig Crond off/on

This off/on works on 2, 3, 4, 5.

Open a runlevel: Chkconfig--level 3 Crond on

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Open multiple RunLevel: chkconfig--level 245 Crond on

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4. The list of services generated by the system is in this directory

cd/etc/init.d/"Green section"

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5. Add service Items

Grammar: Chkconfig--add servername, do an experiment:

(1) first CP Crond WTF

(2)ls-l wtf (this WTF must have execute permission, otherwise cannot join to the system service list)

(3)chkconfig--list |grep wtf not found in the list WTF

(4)chkconfig--add wtf

As follows:

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6. Delete Service Items

Syntax: chkconfig--del servername #只能cd到该目录下操作

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This article is from the "Hand of the Paladin Control" blog, please make sure to keep this source http://wutengfei.blog.51cto.com/10942117/1909748

Introduction to Linux system services