LINUX (FC Series) Start service detailed

As a startup for Red HAT Linux, if it's just for personal use, only the following services need to be enabled, and if they are still being reduced, only network can be enabled, which is the Fedora Core 2 boot service.
Acpid: provides advanced power management.
Cpuspeed: It can improve the operation efficiency of the system.
Crond: Perform routine procedures.
Iptables: Firewall.
Kudzu: Automatic detection of hardware changes.
Network: Activates the network interface.
Random: Speed up the system startup.
ReadAhead and readahead_early: Speed up system startup.
Syslog: Writes various types of events to the log.
Acpid configuration file:/proc/acpi/event
Preset ports: None
Description: Advanced Configuration and Power Interface, a new source management standard for replacing traditional APM power management standards.
Whether you need to start: if you need to manage the power supply, it needs to be started.
Anacron configuration file:/etc/anacron
Preset ports: None
Description: An automated run task. Red Hat Linux has four tools for automating tasks: Cron, Anacron, at, and BATC. When your Linux host does not turn on all the time, this anacron can help you perform work that has not been performed during the "crontab" setting. For example, when your host shuts down at 12:00 in the evening, but crontab this routine work is done at 4:00, the routine work is not working. But it can be done with Anacron.
Whether you need to start: If the host has been powered up 24 hours and Cron is running, then the daemon does not need to be started.
APMD configuration file:/ETC/SYSCONFIG/APMD
Preset ports: None
Description: Advanced power Management, advanced source management. The traditional power management standard. The general system will support both APM and APMD two flags at the same time, but the system can load only one load. It is more useful for laptops to understand the "battery power" of your system.
Whether you need to start: if we are using a desktop computer or a machine that has been powered on, we do not need to use this daemon.
ATD configuration file:/etc/at.allow,/etc/at.deny
Preset ports: None
Description: An automated run task.
Whether it needs to be started: it usually needs to be started. But if you are using cron all the time, you can also not start.
AutoFS configuration file:/etc/rc.d/init.d/autofs
Preset ports: None
Note: Realize the automatic loading of CD-ROM and floppy disk.
Whether you need to start: generally do not need to start.
Chargen
CHARGEN-UDP Preset Port: tcp/udp 19
Description: Character generator Protocol, a network service, the main function is to provide similar functions of remote typing.
More details: Http://www.networksorcery ...;
Whether you need to start: To be safe, try to shut down this service.
Cpuspeed Note: Monitor system idle percentage, reduce or accelerate CPU clock speed and voltage to minimize energy consumption while system is idle, and maximize system execution speed when system is busy.
More details:
Http://altlinux.org/index .....
Whether you need to start: need to start.
Crond configuration file:/etc/crontab
Preset ports: None
Description: The daemon used to perform routine commands.
Whether you need to start: Must start.
Cups configuration file:
Cups server configuration file:/etc/cups/cupsd.conf
Cups Client configuration file:/etc/cups/client.conf
Cups printer configuration file:/etc/cups/printers.conf
Cups (Class) configuration file:/etc/cups/classes.conf
Description: Common Unix Printing System, public UNIX print support, to provide Linux printing capabilities.
Whether you need to start: If you do not install a printer, you do not need to start.
CUPS-LPD Preset Port: None
Description: CUPS line Printer Daemon ("LPD") to provide printing capabilities.
Whether you need to start: If you do not install a printer, you do not need to start.
Daytime
DAYTIME-UDP Preset port: TCP 13
Description: The daytime protocol (RFC867) is a simple protocol that enables clients to obtain the date and time from a remote server.
Whether you need to start: do not start.
Echo
ECHO-UDP Preset Port: 7
Description: The server echoes the customer data service.
Whether you need to start: do not start.
GPM configuration file:/etc/sysconfig/mouse
Preset ports: None
Description: General purpose Mouse Daemon, GPM provides mouse support for Linux programs such as MC (Midnight Commander) in text mode. It also supports a copy of the mouse under the console, a paste operation, and a pop-up menu.
Whether you need to start: Do not recommend to start if necessary.
Iptables Description: Firewall.
Whether you need to start: Must start.
IrDA Infrared Data Association is an industrial standard for the realization of infrared wireless data transmission.
Irqbalance a load-balanced daemon for system interrupt requests in multiple system processor environments.
Whether you need to start: if you have only one CPU installed, you do not need to load this daemon.
ISDN Integrated Services Digital Network, integrated Digital Service network. Provides support for ISDN devices.
Kudzu configuration file:
/etc/sysconfig/hwconf
/etc/sysconfig/kudzu
Description: Hardware automatic detection program, will automatically detect whether the hardware changes, and the corresponding hardware add, delete work. When the system starts, Kudzu detects the current hardware and makes a one by one control of the hardware information stored in/etc/sysconfig/hwconf, and if a hardware is added or deleted from the system, then Kudzu is aware and notifies the user whether the configuration is relevant , and then modify the/etc/sysconfig/hwconf to keep the hardware data synchronized with the system. If/etc/sysconfig/hwconf This file does not exist, then kudzu will be from/etc/modprobe.conf,/etc/sysconfig/network-scripts/and/etc/X11/ Detects existing hardware in Xf86config.
Whether you need to start: If you start kudzu, every time you start the system, checking the new hardware (checking new hardware) will prolong the system startup time. If you are not going to add new hardware, you can turn off the boot service to speed up the system startup time.
Mdmonitor the daemon associated with the RAID device.
MDMPD the daemon associated with the RAID device.
Messagebus D-bus is a library that provides one-to-one communication for two or more applications.
Dbus-daemon-1 is an application that uses this library to implement the Messagebus daemon. Multiple applications can exchange information with other programs by connecting to the Messagebus daemon.
More details:
Http://www.freedesktop.org ...;
Microcode_ctl can encode and send new micro-code to kernel to update the Intel IA32 series processor (Pentium Pro,pii,piii,pentium 4,celeron, Xeon, and so on-all P6 and higher, excluding pen Tium Classics).
More details:
Http://www.urbanmyth.org/m ...;
Http://microcodes.sourcefo ...;
Netdump News Backup Dump server, remote backup servers.
Netfs network filesystem Mounter, installs and unloads NFS, samba, and NCP network file systems.
NETPLUGD configuration file:
/etc/netplug/netplugd.conf
/etc/netplug.d/netplug
Description: Network cable hotplug Management DAEMON,NETPLUGD is a daemon that can monitor the state of one or more network interfaces and run an external script when certain events are triggered.
More details: http://people.debian.org/~ ...;
Network activates all network interfaces when the system is started.
NFS Network File System.
Nfslock NFS is a popular protocol for sharing files over a TCP/IP network, which provides NFS file locking capabilities.
NTPD configuration file:/etc/ntp.conf
Description: Network time Protocol daemon, Network Timing correction protocol. Simply put, NTP is the protocol used to keep the system synchronized with an exact time source.
Recommend everybody read an article: "ntp-lets the computer time in the network accurate to millisecond"
Published on the 63rd page of the December 2004 online technology Magazine
PCMCIA PCMCIA Card, which supports PCMCIA devices for laptops, such as modems, network adapters, SCSI cards, and so on.
The Portmap portmap Daemon provides the allocation of dynamic ports for RPC services, such as NIS and NFS.
PSACCT includes tools for monitoring process activity, including Ac,lastcomm, Accton, and SA.
Random Description: It is very important for the system to quickly put the state of the system in random time memory into the scene file. Because after powering on, the system will quickly revert to the state before the boot.
Whether you need to start: Must start.
Rawdevices the daemon used to load raw devices when using the clustered file system.
ReadAhead
Readahead_early configuration file:/etc/readahead.early.files/etc/readahead.files
Description: ReadAhead and readahead_early are the latest two daemon daemons in Fedora Core 2. The effect is that the files that will be used to start the system are first read into memory and then executed in memory to speed up the system during boot. The above two profiles hold a list of files that will be read to memory.
RHNSD Red Hat Network Service. Inform you about official security information and patch your system.
Rpcgssd
Rpcidmapd
RPCSRCGSSD Description: Gestion NFS v4 is a new feature added to the Linux 2.6 kernel.
Whether you need to start: Do not need to start.
rsync remote sync, remotely data Backup tool.
SASLAUTHD uses the SASL authentication daemon.
SendMail mail server.
Services an internal XINETD service for monitoring activities.
Sgi-fam realizes real-time data mirroring. Monitor file changes to provide an application API interface for timely notification when the specified file fire directory changes.
SMARTD Self Monitor Analysis and Reporting Technology System to monitor the failure of your hard drive.
sshd configuration file:
OpenSSH server configuration file:/etc/ssh/sshd_config
OpenSSH Client configuration file:/etc/ssh/ssh_config
Preset ports: 22
Description: Secure Shell Protocol, to achieve a secure remote login management host.
Whether you need to start: if you want to achieve remote management, you need to start.
Syslog configuration file:/etc/syslog.conf
Description: Log all system behavior.
Whether you need to start: Must start.
Time and date from the remote host, using the TCP protocol.
TIME-UDP gets the time and date from the remote host and uses the UDP protocol.
Vncserver VNC (Virtual network Computing), which provides a lightweight protocol that displays the entire "desktop" of a remote computer on a local system.
More details: http://www.realvnc.com/;
XFS Preset port: TCP 7100
Description: X font server,x window font server that provides a font set for both local and remote X servers.
Whether you need to start: If you use the graphical interface of Run-level 5, you need to start.
XINETD configuration file:/etc/xinetd.conf
Description: Xinetd as a subsequent version of inetd, responsible for management of services not frequently used in the system, these services will be requested by the XINETD Service is responsible for starting the operation, once the completion of Service request service program to complete the operation, this can effectively reduce the occupancy rate of system resources. Typically, XINETD manages programs such as Telnet, FTP, rsh, and Rlogin. Closing inetd also closes these services that are managed by it.
More details: http://www.xinetd.org/;
Whether you need to start: Must start.
Yum configuration file:/etc/yum.conf
Description: Yellow Dog updatermodified, a management program that automatically updates, installs, and removes RPM packages, automatically calculates software package management procedures and determines which software should be installed and which software will not be installed.
More details: http://linux.duke.edu/proj ...
Whether you need to start: decide whether to start by System management policy.