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This article analyzes "what are the common services and functions in Linux systems?" The content is detailed and easy to understand. Friends who are interested in "what are the common services and functions in the Linux system" can follow the editor's train of thought to read it slowly and deeply. I hope it will be helpful to you after reading. Let's follow the editor to learn more about "what are the common services and functions in Linux systems".

Service name functional introduction acpid power management interface is recommended. If it is recommended by laptop users to turn it on, you can listen to the relevant power events in the kernel layer. Open the scheduled task program of the anacron system. A subsystem of cron, if the scheduled task misses the execution time, it can continue to wake up and execute through anacron. Turn off the alsasoundAlsa sound card driver. If you use an alsa sound card, turn the apmd power management module on and off. If you support acpid, you do not need apmd, and you can turn off atd to specify that the system performs a task at a specific time, only once. Turn it on if necessary, but we usually use crond for cyclic timing tasks. Shut down the auditd audit subsystem. If this service is enabled, the audit information of SELinux will be written to the / var/log/audit/audit.log file. If it is not enabled, the audit information will be recorded in syslog to enable autofs so that the server can automatically mount the shared data of other servers in the network, which is generally used to mount NFS services automatically. If there is no NFS service, it is recommended to shut down avahi-daemonAvahi is an implementation of the zeroconf protocol. It can find devices and services based on DNS protocol in the local area network without zeroconf services. Turn it off unless you have a compatible device or use the zeroconf protocol. Turn off bluetooth Bluetooth device support. Bluetooth devices are not generally enabled on the server, and turning off it and turning off capi is only useful for users using ISND devices. Turn off chargen server that chargen-dgram uses the UDP protocol. The main function is to provide functions similar to remote typing. Close chargen-stream as above. Turning off cpuspeed can be used to adjust the frequency of CPU. When idle, the CPU frequency can be automatically reduced to save power. To start the scheduled task of the crond system, the general Linux server needs the timing task to help the system maintenance. It is recommended to turn on cvs a version control system to turn off daytime-dgramdaytime 's Daytime daemon using TCP protocol, which provides clients with the function of obtaining dates and times from remote servers. Close daytime-stream as above. Close the daemon for the POP3/IMAP service in the dovecot mail service. It is mainly used to receive mail. If the mail service is started, it will be turned on, otherwise the process of shutting down the echo-dgram server echo customer service will be closed. Close echo-stream as above. After the installation of the shutdown firstboot system is complete, there is a welcome interface that needs to be initially set up for the system process. That's what this process does. Since it's not the first time to start, turn off the gpm. You can use the mouse to copy and paste in the character terminal (tty1-tty6). That's the function of this service. Open the haldaemon test box to support USB devices. If the server can be turned off, the individual machine is recommended to turn on. Turn off the detection of hidd Bluetooth mouse, keyboard and other Bluetooth devices. The bluetooth service must be started. Turn off hplipHP printer support, if there is no HP printer off, turn off the httpdapache service daemon. If you need to start apache, turn it on. Enable the firewall of ip6tablesIPv6. Currently, the IPv6 protocol is not used. You can disable and disable the iptables firewall. Firewall in Linux is a kernel-supported feature. This is the main means of protection of the server and must be turned on. Enable irdaIrDA to provide communication support between infrared devices (notebook, PDA's, mobile phone, calculator, etc.). Turn off irqbalance to support multi-core processors, so that CPU can automatically allocate system interrupts (IRQ) to improve system performance. At present, most of the servers are multi-core CPU, please turn it on. Turn on isdn and use ISDN devices to connect to the network. At present, the mainstream networking methods are optical fiber access and ADSL,ISDN are very rare. Please turn off kudzu. This service can be used for hardware detection at boot time, and the relevant setup software will be called. It is recommended to disable lvm2-monitor. Enable / disable lvm2-monitor only when needed. This service allows the system to support LVM logical volume groups. If the partition is in LVM mode, it should be enabled. It is recommended to enable the support service for mcstransSELinux. It is recommended to enable mdmonitor. This service is used to monitor the information of Software RAID or LVM. It is not a required service. It is recommended to turn off mdmpd. This service is used to monitor Multi-Path devices. It is not necessary for the service to turn off messagebus. This is Linux's IPC (Interprocess Communication) service, which is used to exchange information in various software. It is personally recommended to turn off the CPU of the microcode_ctlIntel series to support additional microinstruction sets through this service. Shut down the mysqldmysql database server. Enable it if necessary, otherwise close the daemon that enables the namedDNS service and use it for domain name resolution. Turn it on if it is a DNS server, otherwise turn off netfs. This service is used to automatically mount the shared file space on the network when the system starts, such as NFS,Samba and so on. Turn it on if necessary, otherwise turn off and turn off network to provide network settings. Manage the network through this service, so turn on the nfsNFS (Network File System) service and the file sharing service between Linux and Linux. Turn it on if necessary, otherwise disable nfslock if you use the NFS service in Linux, in order to prevent the same file from being edited by different users at the same time, all have this lock service. Some NFS is on, otherwise turn off ntpd this service can automatically update the system time through the Internet, so that the system time is always accurate. Turn on if necessary, but it is not necessary for the service to turn off the pcscd smart card detection service. You can turn off the service that portmap uses for remote procedure call (RPC), or if you do not have any RPC service, you can turn it off. Mainly NFS and NIS service requirements. Turn off psacct this daemon supports several tools that monitor process activity. Close rdisc client ICMP routing protocol turn off readahead_early when the system is booted, load some processes such as memory consolidation first, which can speed up the startup a little bit. Close readahead_later as above close restorecond is used to monitor and reload the correct file context for SELinux. If SELinux is enabled, it needs to be enabled. Turn off rpcgssd client-side features related to NFS. If there is no NFS, shut it down. Close rpcidmapd as above close the rsync remote data backup daemon. Close the daemon for the sendmailsendmail mail service. If there is a mail service, turn it on, otherwise turn off setroubleshoot this service is used to record SELinux-related information in the log / var/log/messages. It is recommended to enable smartd. This service is used to automatically detect the status of the hard disk. It is recommended to enable the daemon to enable the smb network service samba. Data can be shared between Linux and Windows. Turn on the daemon that shuts down the squid agent service if necessary. Turn it on if necessary, otherwise turn off the service of sshdssh encrypted remote login management. Remote management of the server must use this service and do not turn off the daemon that opens the syslog log. Open the daemon for the vsftpdvsftp service. Turn it on if you need a FTP service, otherwise turn off xfs, which is the font daemon of X Window. Provide font service for the graphical interface, if you do not start the graphical interface, you do not need to open it. Close the xinetd super daemon. If there is a service that depends on xinetd, it must be turned on. Open ypbind to activate the ypbind service process for NIS (network information system) clients. Turn off the online upgrade service for yum-updatesdyum. Shut down about the common services in the Linux system and what the functions are shared here, I hope that the above content can make you improve. If you want to learn more knowledge, please pay more attention to the editor's updates. Thank you for following the website!

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