[Add to favorites] detailed descriptions of system services/daemon in Linux

Acpid	Acpid (Advanced Configuration and Power Interface) is a new power management standard to replace the traditional APM power management standard. Generally, the laptop needs to be powered on for management.
Alsasound	ALSA audio card driver daemon. The ALSA sound card driver was originally written for a sound card gravis ultrasound (GUS). The program was proven to be excellent, so the author began to write drivers for a general sound card. ALSA is compatible with OSS/free and OSS/Linux, but it has its own access port, which is even better than OSS.
AMD	Automatically install the NFS daemon.
Anacron	An automated running task daemon. Red Hat Linux comes with four automated tasks: Cron, anacron, at, and BATC. When your Linux server is not running all day long, this anacron can help you execute the work that has not been executed within the time set by "crontab.
Apmd	Apmd (Advanced Power Management) is advanced power management. Traditional Power Management Standards are useful for laptops and can be used to understand the battery information of the system. And write the relevant information into the log through syslogd. It can also be used to shut down when the power supply is insufficient.
Arptables_jf	Controls the daemon for users in the arptables network.
Arpwatch	Record logs and build an ethernet address and IP address pair database that is visible on the LAN interface.
Atalk	Appletalk network daemon. Do not run the program in the background. The data structure of the program must be initialized for a certain period of time before other processes are run.
ATD class = "mytd"	The at and batch command daemon processes. You can use the at command to schedule tasks. Batch is used to run Batch processing tasks when the system load is low.
Autofs	The automatic installation and management process automount is NFS-related and relies on the NIS server.
Yaoch	The Bluetooth server daemon process.
Bootparamd	Bootstrap parameter server, which provides information required for bootstrap for diskless workstations on the LAN.
Chargen	Chargen server (Character Generator Protocol), which uses the tcp Protocol, is a network service. Its main function is to provide functions similar to remote typing.
Chargen-udp	Use the chargen server of UDP protocol.
Cpuspeed	Monitor the idle percentage of the system to reduce or speed up the CPU clock speed and voltage so as to minimize the energy consumption when the system is idle, while maximizing the system execution speed when the system is busy.
Crond	Cron is a traditional Unix program that periodically runs user-scheduled tasks. Compared with the traditional Unix version, the Linux version adds many attributes, which are safer and easier to configure. Similar to scheduled tasks.
Cups	Cups (Common UNIX Printing System) is a general UNIX print daemon process that provides the Third Generation Printing function for Linux.
Cups-config-daemons	The cups printing system switches the daemon process.
Cups-lpd	The cups line printing daemon.
Daytime	The Daytime daemon of TCP is used to obtain the date and time from the remote server for the client. Default port 13.
Daytime-udp	Use the Daytime daemon of UDP.
Dc_client	The client daemon that uses SSL secure sockets.
Dc_server	Proxy daemon using SSL secure sockets.
Dhcpd	The service daemon of the Dynamic Host Control Protocol.
Diskdump	The server disk backup daemon.
Echo	The server returns the client data service daemon.
Echo-udp	The server that uses the UDP protocol returns the client data service daemon.
Eklogin	A service daemon that accepts rlogin session authentication and encrypts it with kerberos5.
Gated	Gateway Routing daemon. It supports various routing protocols, including RIP version 1 and 2, dcn hello protocol, OSPF version 2, and EGP version 2 to 4.
Gpm	The gpm (General Purpose Mouse Daemon) Daemon provides Mouse support for Linux programs such as mc (Midnight Commander) in text mode. It also supports the copy and paste operations and pop-up menus on the console.
Gssftp	Use the ftp daemon authenticated by kerberos 5
Httpd	The Apache daemon of the Web server can be used to provide HTML files and CGI dynamic content services.
Iiim	The daemon process of the Chinese Input Method server.
Inetd class = "mytd"	Internet operation daemon. The monitoring network needs various services managed by it, and starts corresponding service programs when necessary. In Redhat and Mandrake linux, xinetd class = "mytd" is replaced. Debian, Slackware, and SuSE are still used.
Innd	Usenet news server daemon.
Iptables	Iptables firewall daemon.
Irda	Infrared port daemon.
Irqbalance	The server Load balancer daemon that balances system interrupt requests in multiple system processor environments. If you only install one CPU, you do not need to load this daemon.
Isdn	Start and Stop the service daemon.
Keytable	The function of this process is reprinted in the keyboard ing table defined in/etc/sysconfig/keyboards. This table can be selected using the kbdconfig tool. You should make the program active.
Klogin	Log on to the daemon remotely.
Krb5-telnet	Use the telnet daemon for kerberos 5 authentication.
Kshell	Kshell daemon.
Kudzu	The hardware automatic detection program automatically checks whether the hardware has changed and adds or deletes the hardware accordingly. When the system starts, kudzu checks the current hardware and compares it with the hardware information stored in/etc/sysconfig/hwconf, if a hardware is added or deleted from the system, kudzu will detect it and notify the user whether to configure it, And then modify etc/sysconfig/hwconf, synchronize hardware data with the system. If the/etc/sysconfig/hwconf file does not exist, kudzu will start from/etc/modprobe. conf,/etc/sysconfig/network-scripts/and etc/X11/XF86Config to detect existing hardware. If you do not want to add new hardware, you can close the startup service to speed up the system startup time.
Ldap	Ldap (Lightweight Directory Access Protocol) Directory Access Protocol server daemon process.
Lm_seroems	Detects the working process of the motherboard.
Lpd	Lpd is an old-fashioned print daemon that submits lpr programs to print jobs.
Mdmonitor	The daemon of RAID-related devices.
Messagebus	A 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.
Microcode_ctl	It can encode and send new microcodes to the kernel to update the Intel IA32 series processor daemon.
Mysqld	A fast, efficient, and reliable lightweight SQL database engine daemon process.
Named	DNS (BIND) server daemon.
Netd class = "mytd" ump	Remote network backup server daemon.
Netfs	Network Filesystem Mounter. This process installs and uninstalls NFS, SAMBA, and NCP Network file systems.
Netplugd	The netplugd (network cable hotplug management daemon) daemon monitors the status of one or more network interfaces and runs an external script program when some events are triggered.
Network	Activate/disable network interface daemon at startup.
Nfs	Network File System daemon.
Nfslock	NFS is a popular protocol for sharing files through TCP/IP networks. This daemon provides the NFS file locking function.
Ntpd	Network time Protocol daemon (Network time correction Protocol ). Ntpd is a protocol daemon process used to synchronize time between the system and a precise time source.
Pcmcia	It is mainly used to support the laptop interface daemon process.
Portmap	This daemon is used to support RPC connections. RPC is used for NFS, NIS, and other services.
Postgresql	PostgreSQL relational database engine.
Pppoe	ADSL connection daemon.
Proftpd	Proftpd is a Unix-based ftp server daemon with flexible configuration.
Psacct	The daemon includes several tools used to monitor process activity, including ac, lastcomm, accton, and sa.
Random	The high-quality random number generator for saving and restoring the system. These random numbers are provided by Uniform Random behavior.
Rawdevices	The daemon used to load raw devices when using the cluster file system.
Readahead, readahead_early	Readahead and readahead_early are the two backend daemon programs released in Fedora core 2. The function is to read the files used to start the system to the memory during system startup, and then execute the files in the memory to speed up the system startup speed.
Rhnsd	Red Hat Network Service daemon. Notify the official security information and patch the system.
Routed	The daemon supports automatic IP route table maintenance for the RIP Protocol. RIP is mainly used on small networks. A larger network requires a more complex protocol.
Rsh	Start a shell on the remote host and execute USER commands.
Rstatd class = "mytd"	A waiting process for other machines on the LAN to collect and provide system information.
Rsync	Remote sync remote Data Backup daemon.
Ruserd	Remote user location service, an RPC-based service that provides user information about a machine log recorded on the LAN.
Rwalld	Activate the rpc. rwall service process, which is an RPC-based service that allows users to write messages to other terminals registered on the LAN machine.
Rwhod	Allows remote users to obtain a list of all logged-on users on the machines running the rwho daemon.
Rwhod	Activate the rwhod service process, which supports the rwho and ruptime services of the LAN.
Saslauthd	Use the SASL authentication daemon.
Sendmail	The sendmail daemon of the mail server.
Smartd class = "mytd"	Self Monitor Analysis and Reporting Technology System, which monitors whether your hard disk is faulty.
SMB	Samba file sharing/printing service daemon.
Snmpd	The local Simple Network Management daemon.
Squid	The squid daemon of the proxy server.
Sshd	OpenSSH server daemon. Secure Shell protocol enables secure remote host management.
Syslog	A script that enables Syslog and klogd system logs to wait for processes during system boot.
Time	The daemon obtains the time and date from the remote host using the TCP protocol.
Time-udp	The daemon obtains the time and date from the remote host and uses UDP protocol.
Tux	Run the daemon of the Apache server in the Linux kernel.
Vncserver	VNC (Virtual Network Computing) provides a lightweight protocol for displaying the entire desktop of a remote computer on a local system.
Vsftpd	The daemon of the vsftpd server.
XFS	X Window server daemon provides a font set for local and remote X servers.
Xinetd class = "mytd"	Supports core daemon processes of multiple network services.
Ypbind	Activate the ypbind service process for the NIS (Network Information System) client.
Yppasswdd	The NIS Password server daemon.
Ypserv	The NIS master server daemon.
Yum	Rpm operating system automatic upgrade and software package management daemon