View source for Linux: Configurando servicos utilizando o systemctl

O systemctl é a ferramenta para gerenciar serviços no Fedora. 


== Listando os serviços ==

para listar serviços utilize o systemctl com as seguintes opções:

 # '''systemctl -t service'''
 UNIT                                                                         LOAD   ACTIVE SUB     DESCRIPTION
 abrt-ccpp.service                                                            loaded active exited  Install ABRT coredump hook
 abrt-oops.service                                                            loaded active running ABRT kernel log watcher
 abrt-xorg.service                                                            loaded active running ABRT Xorg log watcher
 abrtd.service                                                                loaded active running ABRT Automated Bug Reporting Tool
 accounts-daemon.service                                                      loaded active running Accounts Service
 ...
 systemd-vconsole-setup.service                                               loaded active exited  Setup Virtual Console
 udisks2.service                                                              loaded active running Disk Manager
 upower.service                                                               loaded active running Daemon for power management
 wpa_supplicant.service                                                       loaded active running WPA Supplicant daemon
 
 LOAD   = Reflects whether the unit definition was properly loaded.
 ACTIVE = The high-level unit activation state, i.e. generalization of SUB.
 SUB    = The low-level unit activation state, values depend on unit type.
 
 60 loaded units listed. Pass --all to see loaded but inactive units, too.
 To show all installed unit files use 'systemctl list-unit-files'.

== Verificando o status de um serviço ==

Para verificar um serviço no sistema digite

 '''# systemctl status httpd.service''' 
 httpd.service - The Apache HTTP Server
   Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled)
   Active: active (running) since Tue 2013-08-06 10:35:56 BRT; 44s ago
  Process: 24662 ExecStop=/usr/sbin/httpd $OPTIONS -k graceful-stop (code=exited, status=0/SUCCESS)
 Main PID: 24679 (httpd)
   Status: "Total requests: 0; Current requests/sec: 0; Current traffic:   0 B/sec"
   CGroup: name=systemd:/system/httpd.service
           ├─24679 /usr/sbin/httpd -DFOREGROUND
           ├─24680 /usr/sbin/httpd -DFOREGROUND
           ├─24681 /usr/sbin/httpd -DFOREGROUND
           ├─24682 /usr/sbin/httpd -DFOREGROUND
           ├─24683 /usr/sbin/httpd -DFOREGROUND
           └─24684 /usr/sbin/httpd -DFOREGROUND


== Iniciando um serviço ==

Para iniciar um serviço no sistema digite

 # '''systemctl start httpd.service''' 

== Parar um serviço ==

Para arar um serviço no sistema digite

 # '''systemctl stop httpd.service''' 



== Verificar se um serviço esta ativo==

Para verificar se um serviço no sistema digite

 # '''systemctl is-enabled httpd.service''' 
 enabled

== Para desativar um serviço esta ativo==

Para desativar um serviço no sistema digite

 # '''systemctl disable httpd.service''' 
 rm '/etc/systemd/system/multi-user.target.wants/httpd.service'

== Para ativar um serviço esta ativo==

Para ativar um serviço no sistema digite

 # '''systemctl enable httpd.service''' 
 ln -s '/usr/lib/systemd/system/httpd.service' '/etc/systemd/system/multi-user.target.wants/httpd.service'