Disable CentOS unnecessary default service

Disable CentOS unnecessary default service

Methods for CentOS Shutdown service:

Graphical interface, running NTSYSV

1. Chkconfig–level 2345 Service Name off

Service Name	Suggestions	Explain
Acpid	Deactivate	Advanced Configuration and Power Interface Source advanced, commonly used on Laptop
Apmd	Deactivate	Adventage Power Management Daemon Detector System battery volume, commonly used on Laptop
Atd	Deactivate	/etc/at.allow,/etc/at.deny I've probably used Crond to come up with
AutoFS	Deactivate	Auto-mount file system and peripheral devices (e.g. CD-ROM, USB), commonly used on Laptop
Avahi-daemon	Deactivate	When the network does not have a DNS service, it tries to find a host that provides zeroconf
Bluetooth	Deactivate	Bluetooth blue bud, commonly used on Laptop
Cpuspeed	Deactivate	Control CPU speed is mainly used to save electricity, commonly used in Laptop
Cups	Deactivate	Common UNIX Printing System enables the system to support your printer
Firstboot	Deactivate	The service was first initiated when the installation was completed, setting auth, firewall, keyboard ...
gpm	Deactivate	Record the files on your side of the week, such as using mouse in text mode
Haldaemon	Deactivate	Enables the system to support Plug and Play devices
Hidd	Deactivate	Enables the system to support Bluetooth devices, such as mouse, keyboard
Hplip	Deactivate	Enables the system to support HP-linked printer
Ip6tables	Deactivate	Enables the system to support IPTables Filrewall IPV6
Isdn	Deactivate	Enables the system to support the Integrated Services Digital Network (ISDN) environment
Lm_sensors	Deactivate	Enables the system to support the reconnaissance of the main machine or the hard body, commonly used on Laptop
Messagebus	Deactivate	Enables the system to support Plug and Play devices
Nfslock	Deactivate	Enables the system to support NFS Server information consistency feature
Pcscd	Deactivate	Enabling the system to support Smart Card
Portmap	Deactivate	Enables the system to support NFS Service
Rpcgssd	Deactivate	Enables the system to support NFSV4 Service
Rpcidmapd	Deactivate	Enables the system to support NFSV4 Service
Yum-updatesd	Deactivate	Enable the system to support YUM Auto Update Service (the device is OK to update)
Anacron	Look at the situation	There is no work to be done during the crontab setup.
Auditd	Look at the situation	Audit system/var/log/audit/audit.log, if AUDITD does not perform the audit message will be written into/var/log/messages (with SELinux)
Iptables	Look at the situation	Enables the system to support IPTables Filrewall
Irqbalance	Look at the situation	Enables the system to support multiple CPU environments when the load balancing program is interrupted, the single CPU machine does not need
Lvm2-monitor	Look at the situation	Enable system support Logical Volume Manager logically
Mcstrans	Look at the situation	Mainly used in conjunction with SELinux services
Mdmonitor	Look at the situation	Enabling the system to support RAID-related programs
Microcode_ctl	Look at the situation	Enables the system to support Intel IA32 CPU features, so AMD CPUs do not require
Netfs	Look at the situation	Network File System Mounter network mount systems (e.g. NFS, Samba, NCP)
Restorecond	Look at the situation	Enables the system to support SELinux control files
Smartd	Look at the situation	Enables system support to check the hard drive state (Hardware RAID to change the file)
SendMail	Look at the situation	To support the system Sendmail
Xfs	Look at the situation	Enables the system to support the X Window font
Crond	Start	/etc/cron.* Schedule Service
Kudzu	Start	So that the system will automatically perform a hard reconnaissance every time it opens.
Network	Start	Enable the system to support the network card
Readahead_early	Start	When the system is re-initiated, the files are read into memory to speed up the activation.
Sshd	Start	Enables the system to support SSH Service
Syslog	Start	System Log Service supported by the system

CentOS5.5 Default Basic services

Service Name	Function	Default	Suggestions	Note
NetworkManager	For automatic network connection	Shut down	Shut down	Useless to the server
Acpid	Power switch and other detection management	Open	Shut down	Useless to the server
Anacron	A scheduling task management	Open	Open
Apmd	Advanced Power Management	Open	Open
Atd	Execute a command at a specified time	Open	Shut down	If you use Crond, you can turn it off
Auditd		Open	Self-determined	If you use SELinux, you need to open it
AutoFS	File system automatic loading, unloading	Open	Self-determined	Just turn it on when you need it, you can stop
Avahi-daemon	Local Network Service Lookup	Open	Shut down	Useless to the server
Avahi-dnsconfd	Avahi DNS	Shut down	Shut down	Useless to the server
Bluetooth	Bluetooth wireless Communication	Open	Shut down	Useless to the server
Conman	Console Management	Shut down	Shut down	Useless
Spuspeed	Adjust CPU speed	Open	Self-determined
Crond	Scheduled Task management	Open	Open	Very useful, open
Cups	Universal UNIX Print Service	Open	Shut down	Useless to the server
Dnsmasq	DNS Cache	Shut down	Shut down	Useless
Dund	Bluetooth related	Shut down	Shut down
Firstboot	Initial Setup after system installation	Open	Shut down
gpm	Mouse support under the console	Open	Open
Haldaemon	Hardware information Collection Services	Open	Open
Hidd	Bluetooth related	Open	Shut down
Ibmasm	IBM Hardware Management	Shut down	Shut down
Ip6tables	IPv6 firewall	Open	Shut down
Iptables	IPv4 Firewall	Open	Shut down
Irda	Infrared communication	Shut down	Shut down
Irqbalance	CPU Load Balancing	Open	Self-determined	Multi-core cups required
Kudzu	Hardware Change Detection	Open	Shut down	Server useless
Lvm2-monitor	LVM Monitoring	Open	Shut down	Non-cluster useless
Mcstrans	Used to check the context when SELinux is turned on	Open	Shut down
Mdmonitor	Soft RAID Monitoring	Open	Shut down
Mdmpd	Soft RAID Management	Shut down	Shut down
Messagebus	Responsible for passing messages between the various system processes	Open	Open	If deactivated, Haldaemon boot will fail
Microcode_ctl	CPU microcode Management Upgrade	Open	Shut down
Multipathd		Shut down	Shut down
Netconsole		Shut down	Shut down
Netfs	NFS-related	Open	Shut down
Netplugd	Network cable hot-swappable monitoring	Shut down	Shut down
Network		Open	Open
Nfs	Network File system	Shut down	Shut down
Nfslock	NFS-related	Open	Shut down
Nscd	Name cache, which should be related to DNS	Shut down	Shut down
Oddjobd	Related to D-bus	Shut down	Shut down
Pand	Bluetooth related	Shut down	Shut down
Pcscd	PC/SC Smart Card Daemon	Open	Shut down
Portmap	Port Map with NFS, NIS	Open	Shut down
Psacct	Load detection	Shut down	Shut down
Rawdevices	Raw Device Support	Open	Open
Rdisc	Automatic detection of routers	Shut down	Shut down
Readahead_early		Open	Open
Readahead_later		Shut down	Shut down
Restorecond	SELinux related	Shut down	Shut down
Rpcgssd	NFS-related	Open	Shut down
Rpcidmapd	RPC Name to Uid/gid Mapper	Open	Shut down	NFS-related
Rpcsvcgssd	NFS-related	Shut down	Shut down
Saslauthd	SASL Certification Services Related	Shut down	Shut down
SendMail		Open	Shut down
Smartd	Hard Disk automatic Detection daemon	Open	Open
Sshd		Open	Open
Syslog	System Log Process	Open	Open
Tcsd		Shut down	Shut down
Wpa_supplicant	Wireless authentication related	Shut down	Shut down
Xfs	X Windows Related	Open	Shut down
Ypbind	Network Information Service Client	Shut down	Shut down
Yum-updatesd	Yum Auto Upgrade	Open	Shut down	It's dangerous to turn on the server!

Note: The above list of services is shown on the premise that CentOS has only installed basic systems, development tools, development libraries, and old software support.

Disable CentOS unnecessary default service