Services2011/11/09

[1]	Stop services that are enabled by default but you don't need them. List all SysV services by a command below.

[root@dlp ~]#

systemctl -t service

UNIT                      LOAD   ACTIVE SUB     JOB DESCRIPTION
auditd.service            loaded active running     Security Auditing Service
crond.service             loaded active running     Command Scheduler
dbus.service              loaded active running     D-Bus System Message Bus
fedora-readonly.service   loaded active exited      Configure read-only root support
fedora-s...t-late.service loaded active exited      Initialize storage subsystems (RAID, LVM, etc.)
fedora-s...e-init.service loaded active exited      Initialize storage subsystems (RAID, LVM, etc.)
fedora-w...torage.service loaded active exited      Wait for storage scan
getty@tty1.service        loaded active running     Getty on tty1
ip6tables.service         loaded active exited      IPv6 firewall with ip6tables
iptables.service          loaded active exited      IPv4 firewall with iptables
lvm2-monitor.service      loaded active exited      Monitoring of LVM2 mirrors, snapshots etc. using dmeventd or progres
s polling
netfs.service             loaded active exited      LSB: Mount and unmount network filesystems.
network.service           loaded active running     LSB: Bring up/down networking
remount-rootfs.service    loaded active exited      Remount Root FS
rsyslog.service           loaded active running     System Logging Service
sendmail.service          loaded active running     Sendmail Mail Transport Agent
sm-client.service         loaded active running     Sendmail Mail Transport Client
sshd-keygen.service       loaded active exited      SSH server keys generation.
sshd.service              loaded active running     OpenSSH server daemon.
systemd-logind.service    loaded active running     Login Service
systemd-...ollect.service loaded active exited      Collect Read-Ahead Data
systemd-...pi-vfs.service loaded active exited      Remount API VFS
systemd-...bridge.service loaded active running     STDOUT Syslog Bridge
systemd-sysctl.service    loaded active exited      Apply Kernel Variables
systemd-...-setup.service loaded active exited      Recreate Volatile Files and Directories
systemd-...ssions.service loaded active exited      Permit User Sessions
systemd-...-setup.service loaded active exited      Setup Virtual Console
udev-settle.service       loaded active exited      udev Wait for Complete Device Initialization
udev-trigger.service      loaded active exited      udev Coldplug all Devices
udev.service              loaded active running     udev Kernel Device Manager

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.
JOB    = Pending job for the unit.

30 units listed. Pass --all to see inactive units, too.

[2]	Stop a service. The example below means stop 'sendmail' and disable auto-start at booting system.

[root@dlp ~]#

systemctl stop sendmail.service

[root@dlp ~]#

systemctl disable sendmail.service

rm '/etc/systemd/system/multi-user.target.wants/sendmail.service'

[3]	Tehre are some SysV services on Fedora 16. Those are controled by chkconfig like below.

[root@dlp ~]#

chkconfig --list


Note: This output shows SysV services only and does not include native
      systemd services. SysV configuration data might be overridden by native
      systemd configuration.

netconsole      0:off   1:off   2:off   3:off   4:off   5:off   6:off
netfs           0:off   1:off   2:off   3:on    4:on    5:on    6:off
network         0:off   1:off   2:on    3:on    4:on    5:on    6:off

# unset auto-start setting for a netfs

[root@dlp ~]#

chkconfig netfs off

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