Ubuntu Turn off unwanted services

Linux's major distributions, there are some unnecessary services are turned on by default, for Ubuntu, we can use the selective shutdown method to accelerate the start, improve system performance.

Here we install a software:

sudo apt-get install sysv-rc-conf

Then start this way:

sudo sysv-rc-conf

In this software, you can use the keyboard key to move, with a space to select, you can also directly choose with the mouse, and finally save the exit with Q, list the name of the service and the basic explanation.

Acpi-support This is about power support by default is 1,2,3,4,5 under Boot, I think you can adjust it to s level.
Acpid ACPI Daemon, the default is 2-5 open, I think you can do without the tube.
ALSA ALSA Sound subsystem, it should not be opened.
Alsa-utils This service seems to replace the ALSA, so turn on this and I'll open it at the s level.
Anacron This is a service for executing a program that does not execute in time, I think it doesn't matter, so shut it down, this can be casually.
APMD is also a kind of power management, I think if the computer is not very old, it is not necessary to open.
ATD and Anacron are similar, I turn it off.
Bluez-utiles legendary Bluetooth service, and then regretted that I did not, so shut up.
BOOTLOGD seems to be using it to write log, and it may be better to keep him open during security.
CRON specifies the time to run the program's service, so it's better to open it.
Cupsys printer service, so if you have one, just turn it on.
Dbus message bus system, very important, must be open.
Dns-clean dial-up Connection, if not, shut it.
EVMS Enterprise Volume management system, because I do not understand what is called enterprise volume, so I shut it.
Fetchmail for mail guarding, I shut it down.
GDM GNOME Desktop Manager, I turned it off and then started gnome with StartX.
Halt the shutdown, do not change
Hdparm This I have just said, if there is no IDE hard drive will not have to open it.
Hotkey-setup This is a hotkey map designed for some brand notebooks, and the desktop user shuts it down.
HotPlug this is for hot plug, I have tested, on some computer shutdown it will make the sound card invalid, please open it at the s level.
Hplip HP printer, should be able to shut it down.
Ifrename network interface Renaming, it seems useless, turned off.
Ifupdown This allows you to open the network, open it.
Ifupdown-clean ditto.
Klogd The Linux daemon, accepts records from the kernel and sends information to SYSLOGD, and records it as a file, so keep it open.
Linux-restricted-modules-common this use to use the Restricted module, you can view it from the/lib/linux-restricted-modules, if there is nothing, you can turn it off.
LVM Logical Volume Manager, if you don't please turn it off.
Makedev used to create devices to/dev/please don't touch him.
MDAMD manage raid with If you don't please close it.
Module-init-tools from the/etc/modules to the extension module, this is generally open.
Networking to increase the network interface and configure DNS, turn it on.
Ntp-server is synchronized with the Ubuntu time server and is off.
PCMCIA activated Pcmica Equipment, unfortunately I have never seen such a device, shut it.
Powernowd is used to manage the CPU client program, if there is a frequency conversion function, such as AMD's quite ' cool then open it.
PPP dialing, I turned it off.
Ppp-dns the same, also closed.
ReadAhead preload service, reminds me of Win's prefetching, of course they are different, it will make startup slowed down 3-4 good, so I shut it down.
Reboot is enabled, do not move.
Rmnologin If you find Nologin, remove it and don't open it in your notebook.
rsync rsync protocol Guardian, depending on the circumstances.
Screen-cleanup a script that clears the boot screen, whatever.
Sendsigs sends messages to all processes when rebooting and shutting down. So don't care about it.
Single active but user mode, don't worry about it.
Stop-bootlogd stop BOOTLOGD from the 2,3,4,5 level, don't worry about it.
Sudo this needless to say, do not care about it.
SYSKLOGD is used to record system log information without having to worry about it.
Udev User space Dev file system, do not care about it.
Udev-mab ditto.
Umountfs is used to unload a file volume without having to worry about it.
Urandom generate the number of, do not know how to use, do not care about it.
USplash that beautiful splash screen, but I shut it, it also exists, so I want to shut him out of the kernel starting parameters of the splash a sentence deleted.
Vbesave Graphics BIOS Configuration tool, do not care about it.
Xorg-common set X service ice socket. Don't worry about it.


Some of the services commonly used under Redhat
Anacron does not consider cron services during system downtime

AMD automatically installs NFS waiting process

APMD Advanced Power Management

Arpwatch logs and builds a database of Ethernet addresses and IP addresses that are seen on the LAN interface

ATD for at and batch services

AUTOFS automatic installation management process AutoMount, associated with NFS, dependent on NIS

Crond provides running services for processes that are automatically scheduled under Linux.

GPM provides mouse support in character mode.

Keytable for loading keyboard mirrors

Kudzu Hardware Detector

Netfs Install and uninstall NFS, samba, and NetWare network file systems

Network to activate a script that has a configured network interface

Nfslock NFS Lock

PCMCIA Install PCMCIA Card (generally used for portable computer)

SSHD OpenSSH Server

Syslog a script that initiates syslog and KLOGD system logs while the system boots

Xfs Xwindow font server, providing font set for local and remote x servers

XINETD support for a variety of network services, the core waiting procedures.