Shulou(Shulou.com)06/01 Report--

This article mainly introduces "what are the common services of CentOS". In the daily operation, I believe many people have doubts about the common services of CentOS. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful for you to answer the questions of "what are the common services of CentOS?" Next, please follow the editor to study!

Acpid power management can reduce energy consumption and save power by suspending unnecessary devices, reducing the frequency of CPU or other methods.

Apmd--apmd is used to monitor the power status of the system and write relevant information to the log through syslogd. It can also be used to turn off the computer when the power supply is insufficient.

Arpwatch-- is used to maintain the correspondence between Ethernet physical address and ip address

Anacron does not consider cron services during system downtime

Atd-- runs tasks that the user dispatches with the at command. Also run batch tasks when the system load is low

Autofs-- automatically reloads the file system when you need it, and unmounts it automatically when you don't need it

Chargen--tcp version of chargen server

Chargen-udp--udp version of chargen server

Crond-- runs user-scheduled tasks periodically. Compared with the traditional version of unix, it adds a lot of attributes, and it is more secure and easier to configure.

Daytime--tcp version of daytime server

Daytime-udp--udp version of daytime server

Echo--tcp version of echo server

Echo-udp--udp version of echo server

A service that eklogin-- accepts rlogin session authentication and encrypts with kerberos5

The service used by finger-- to respond to finger requests

Gpm-- provides mouse support for linux programs in text mode. It also supports copy of the console mouse, paste operations and pop-up menus (must)

Gssftp-- accepts ftp connections that can be verified by kerberos5

Httpd--http is a famous www server, which can be used to provide html files and cgi dynamic content services.

Identd-- provides a method to verify identity

Ipchains--ipchains packet filtering Firewall

Iptables--iptables packet filtering Firewall

Ipvsadm-- calls ipvsadm to establish and maintain the ipvs routing table

Isdn-- enables isdn (Integrated Services Digital Network) service

Kadmin-- changes are made using native kadmin tools in the master kdc, or through kadmin services

Kdcrotate-- settings kdcs entries in the configuration file / etc/krb5.con

Keytable-- the function of this program is to reprint the keyboard mapping table that you described in / etc/sysconfig/keyboards

Klogin-- accepts rlogin sessions in bsd mode, but requires kerbeos5 authentication

Does kprop-- allow upgrades of master kdc received by kdc?

Krb5-telnet-- allows normal telnet login, but can also use kerberos5 authentication

Krb524-- is to change the lease certificate from kerberos5 to kerberosIV.

Krb5kdc-- opens the connection required by kerberosIV and 5 to obtain the lease certificate.

Kshell-- accepts rshell commands to authenticate and encrypt with kerberos

Kudzu-- runs hardware detection and optionally sets hardware changes

Lpd--lpd is the system print daemon that is responsible for submitting programs such as lpr to the print job.

Netfs-- is responsible for mounting / unmounting nfs, samba, ncp file systems

Network-- activates / shuts down each network interface at startup (must)

Nfs--nfs is a popular file sharing protocol based on tcp/ip network. The service provides nfs file sharing service (nfs: Net File System, short for network file system).

NFS allows a system to share directories and files with others on the network. By using NFS, users and programs can access files on remote systems as if they were local.

Nfslock-- provides nfs file locking function

Nscd-- this service is responsible for querying passwords and groups and buffering query results

Portmap--portmap is used to support rpc connections, and rpc is used for services such as nfs and nis

Postgresql--postgresql Relational Database engine

Random-- saves and restores the system's high-quality random number generator, which is provided by some random behaviors of the system.

Rlogin--rlogin program service that provides registration from remote trusted hosts

Routed-- this daemon supports automatic ip routing table maintenance of the rip protocol. Rip is mainly used on small networks, and larger networks need

A more complex agreement

Rsh-- provides services for rcmd programs or rsh programs

Rstatd--rstat protocol allows users on the network to obtain the performance parameters of each machine on the same network.

A good addition of rsync-- to ftp services, allowing cyclic code summation and checking, etc.

Rusersd-- this service enables network users to locate other users on the same network

The rwalld--rwall protocol allows remote users to send messages to terminals active in the same system, similar to the local behavior of wall

Rwhod-- allows remote users to get a list of all logged-in users on the machine running the rwho wizard, similar to finger

Smb-- starts and closes smbd and nmbd wizard programs to provide smb network services

Snortd-- is a lightweight network intrusion detection tool.

Swat--samba network configuration tool, you can use swat through the 901 port connection of the browser

Syslog--syslog is a mechanism provided by the operating system that daemons usually use to write various information to various Syslog files (must)

Telnet-- provides telnet services that use unencrypted user / password groups for authentication

Time--tcp version of rfc 868 time server

Time-udp--udp version of rfc 868 time server

Webmin--webmin is a powerful management tool based on web, which integrates system management and network management.

Xfs-- starts and stops the x font service when booting and shutting down, and may regenerate the font table (required)

Xinetd-- Internet operation service program. Provides features similar to inetd+tcp_wrapper, but more powerful and secure

Monitor the requirements of the network for the various services it manages, and start the corresponding service programs when necessary

Server side of Network Information Service realized by ypbind--

At this point, the study of "what are the common services of CentOS" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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