Centos 5 System Service Optimization

After the centos installation is minimized, many servers are enabled by default, which is useless for running the servers. Generally, they are disabled. Minimum installation I prefer to select the following package groups
Administration Tools administrator Tools
Base System
Development Libraries Development Link Library
Developmetn Tools
Editors editing tool
Network Servers Network SERVICE
Server Configuration Tools Server Configuration Tool
System Tools
Text-Based Internet Text Browser

By default, many services are enabled for specific purposes and can be disabled. See the following table.

NetworkManager automatically switches between multiple network connections
Acpid new power management standard, usually used in laptops
Anacron automatically runs the task daemon process
Atd automatically runs the task daemon process
Auditd audit information, which stores the system audit records generated by the kernel.
Autofs Automatic Installation Management Process automount
Avahi-daemon Zeroconf service discovery daprocess
Avahi-dnsconfd/etc/avahi/dnsconf. action Script daemon process
Bluetooth
Conman Console Management
CPU speed monitoring system idle percentage to reduce or speed up CPU clock speed and voltage enabling
Crond automatically scheduled task Enabled
Cups Common UNIX print daemon
Dnsmasq Dns cache server daemon
Dund Bluetooth Dial-Up Network
The User Configuration Wizard after firstboot is installed to set the system for the first time.
Gpm provides mouse support, copy and paste operations, and pop-up menus for Linux programs in text mode.
Haldaemon Hardware Monitoring System
Hidd Bluetooth h. I. D. Server
Httpd Apache server
Ip6tables ipv6 tables firewall daemon
Ipmi OpenIPMI Driver initialization script
Iptables firewall daemon
Irda infrared port daemon process
Server Load balancer balances system interrupt requests in irqbalance multi-system processor environment.
Kdump initialize the kdump script
Kudzu Hardware automatic detection program. If no new hardware is added, you can disable it.
Lvm2-monitor LVM2 mirror devices daemon
Mcstrans SELinux Context Translation System Daemon
The daemon of The mdmonitor RAID-related device is enabled.
Mdmpd RAID-related device daemon Enabled
Messagebus event monitoring service, which sends broadcast information to all users when necessary.
Microcode_ctl can be encoded and New Micro code is sent to the kernel to update the Intel IA32 series processor daemon process
Multipathd Manage device-mapper multipath devices
Netconsole Initializes network console logging
Netfs install and uninstall NFS, SAMBA, and NCP network file systems
Netplugd service monitoring network interface, which is closed or started based on signal, used for laptop
Enable the script program with configured network interfaces
Nfs Network File System daemon
Nfslock NFS file lock function
Nscd password and Group Search Service
Ntpd Network Time Synchronization
Oddjobd
Pand Bluetooth personal region Network
Pcscd Smart Card support
Portmap is used to support RPC connections. RPC is used for NFS, NIS, and other services.
Psacct process audit daemon
Rawdevices to block devices. Oracle Database usage
Rdisc discovers routers daemon
Readahead_early boot Memory loading optimization Enabled
Readahead_later boot Memory loading optimization Enabled
Associated with restorecond SELinux
Rpcgssd manages rpcsec gss contexts for the NFSv4 server
Rpcidmapd for NFSv4 that maps user names to UID and GID numbers
Rpcsvcgssd manages rpcsec gss contexts for the NFSv4 server
Saslauthd uses SASL's authentication daemon
Sendmail server sendmail daemon
Setroubleshoot SELinux Troubleshooting
Smartd monitoring hard disk failure Enabled
Sshd OpenSSH server daemon Enabled
Syslog System Log Enabled
Tcsd TrouSerS server daemon
Winbind for Samba Server
Wpa_supplicant wireless device support
Xfs X Window server daemon, which provides a font set for local and remote X Servers
Ypbind activates the ypbind service process for the NIS client
Yum-updatesd RPM automatic upgrade and software package management daemon Enabled

Service management commands

Query the chkconfig-list
Set the service to start the chkconfig service name on
Set service to enable chkconfig service name off

Close service name stop

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