20. Services

  • Daemons

  • SystemV

  • SystemD

  • Upstart

20.1. Runlevel

20.2. Initialization

  • /etc/init.d

  • /etc/rc0.d

  • /etc/rc1.d

  • /etc/rc2.d

  • /etc/rc3.d

  • /etc/rc4.d

  • /etc/rc5.d

  • /etc/rc6.d

  • /etc/rcS.d

  • /etc/rc.d

  • /etc/rc.local

20.3. Configuration

  • /etc/default/

20.4. Management

  • Systemd

  • System-V

  • Init-d

  • Upstart

  • /etc/sysctl.d

  • /etc/systemd

20.5. Commands

Table 20.1. Services

Command

Type

Description

service

run a System V init script

sysctl

read/write system parameters

sysctl

configure kernel parameters at runtime

systemctl

Control the systemd system and service manager

systemd

systemd system and service manager