CompTIA Linux+ Portable Command Guide: All the commands for the CompTIA XK0-004 exam in one compact, portable resource, 2nd Edition

Chapter 10. Given a scenario, manage services

This chapter provides information and commands concerning the following topics:

Systemd management

• Systemctl

• Enabled

• Disabled

• Start

• Stop

• Mask

• Restart

• Status

• Daemon-reload

Systemd-analyze blame

Unit files

• Directory locations

• Environment parameters

• Targets

• Hostnamectl

• Automount

SysVinit

• chkconfig

  • on

  • off

  • level

• Runlevels

  • Definitions of 0–6

  • /etc/init.d

  • /etc/rc.d

  • /etc/rc.local

  • /etc/inittab

  • Commands (runlevel, telinit)

• Service

  • Restart

  • Status

  • Stop

  • Start

  • Reload

Systemd Management

Instead of the runlevels that SysVinit uses, Systemd uses “targets.” Each target has specific services that start. See Figure 10.1 for an example of a typical Systemd boot sequence.

Figure 10.1 Overview of the Systemd ...