Explanation of basic centos default services

1. Use chkconfig -- list to view installed services. For example, I want to minimize some services after installation.

[[Email protected] ~] # Chkconfig -- list

Auditd 0: off 1: off 2: On 3: On 4: On 5: on 6: Off

Crond 0: off 1: off 2: On 3: On 4: On 5: on 6: Off

Ip6tables 0: off 1: off 2: On 3: On 4: On 5: on 6: Off

Iptables 0: off 1: off 2: On 3: On 4: On 5: on 6: Off

The lvm2-monitor 0: off 1: On 2: On 3: On 4: On 5: on 6: Off

Netconsole 0: off 1: off 2: off 3: off 4: off 5: off 6: Off

Netfs 0: off 1: off 2: off 3: On 4: On 5: on 6: Off

Network 0: off 1: off 2: On 3: On 4: On 5: on 6: Off

Postfix 0: off 1: off 2: On 3: On 4: On 5: on 6: Off

Rdisc 0: off 1: off 2: off 3: off 4: off 5: off 6: Off

Restorecond 0: off 1: off 2: off 3: off 4: off 5: off 6: Off

Rsyslog 0: off 1: off 2: On 3: On 4: On 5: on 6: Off

Saslauthd 0: off 1: off 2: off 3: off 4: off 5: off 6: Off

Squid 0: off 1: off 2: off 3: off 4: off 5: off 6: Off

Sshd 0: off 1: off 2: On 3: On 4: On 5: on 6: Off

Udev-post 0: off 1: On 2: On 3: On 4: On 5: on 6: Off

2. view the default startup mode of the current system.

[[Email protected] ~] # Cat/etc/inittab

ID: 3: initdefault: # enter the command line mode when the mode is 3.

3. Use the chkconfig service name off to disable service startup.

4. Explanation of basic centos services:

Service name function default suggestion remarks

NetworkManager is used to automatically connect to and close the network. It is useless to the server.

Acpid Power Supply switch and other Detection Management turn off is useless to the server

Anacron enables scheduled task management

Apmd advanced power management enabled

ATD enables or disables a command at a specified time. If crond is used, it can be disabled.

Auditd enables customization. If SELinux is used, you need to enable it.

The AutoFS file system can be automatically loaded and detached.

Avahi-daemon Local Network Service lookup and disabling is useless to servers

Avahi-dnsconfd avahi it is useless for the server to disable DNS.

Enabling or disabling bluetooth wireless communication is useless to servers

It is useless to close the conman Console Management.

Use spuspeed to adjust CPU speed and enable Customization

It is useful to enable crond scheduled task management.

Cups General UNIX Printing Service is useless to servers when it is enabled or disabled

It is useless to disable dnsmasq DNS cache.

Dund Bluetooth disabled

Enable and disable the initial setting after the firstboot system is installed

You can enable the mouse on the GPM console.

Haldaemon hardware information collection service enabled

Disabled for Bluetooth

Disable ibmasm IBM Hardware Management

Disable ip6tables IPv6 Firewall

Disable iptables IPv4 Firewall

Disable IrDA Infrared Communication

Irqbalance CPU load balancing to enable custom multi-core CPU needs

Kudzu Hardware change detection enabling and disabling the server is useless

Lvm2-monitor LVM monitoring turn off non-cluster useless

When SELinux is enabled, mcstrans checks whether context is enabled or disabled.

Disable mdmonitor soft RAID monitoring

Disable mdmpd soft RAID Management

Messagebus is responsible for enabling message transmission between various system processes. if disabled, haldaemon will fail to start.

Microcode_ctl CPU microcode management upgrade enabled and Disabled

Disable multipathd

Disable netconsole

Disable netfs NFS

Disable netplugd network hot swapping monitoring

Enable Network

Disable NFS Network File System

Enable or disable nfslock NFS

Nscd name cache, which should be closed for DNS

Oddjobd closed with D-BUS related

Disable pand Bluetooth

Disable pcscd PC/SC Smart Card daemon

Port map enabled and disabled when Portmap is used for NFS and NIS

Close psacct Load detection

Rawdevices raw device supports enabling

Rdisc automatically detects router Shutdown

Readahead_early Enabled

Close readahead_later

Disable restorecond SELinux

Disable rpcgssd NFS

Enable rpcidmapd RPC name to UID/GID Mapper to disable NFS-related

Disable rpcsvcgssd NFS

Close saslauthd SASL Certification Service

Disable sendmail

Smartd hard disk Automatic Detection daemon Enabled

Sshd Enabled

Syslog system logging process enabled

Disable tcsd

Disable wpa_supplicant Wireless authentication

Disable xfs x Windows

Ypbind Network Information Service client closed

Yum-updatesd Yum automatic upgrade enabled/disabled is dangerous for Servers

This article from the "Flying Pig" blog, please be sure to keep this source http://thinkpig007.blog.51cto.com/971471/1438136