在之前的版本中关闭防火墙等服务的命令是

service iptables stop

/etc/init.d/iptables stop

在RHEL7中,其实没有这个服务

[root@rhel7 ~]# cat /etc/redhat-release

Red Hat Enterprise Linux Server release 7.0 (Maipo)

[root@rhel7 ~]# service iptables stop

Redirecting to /bin/systemctl stop  iptables.service

[root@rhel7 ~]# /etc/init.d/iptables stop

-bash: /etc/init.d/iptables: No such file or directory

原来在RHEL7开始，使用systemctl工具来管理服务程序，包括了service和chkconfig

[root@rhel7 ~]# systemctl list-unit-files|grep enabled

cups.path                                   enabled

abrt-ccpp.service                           enabled

abrt-oops.service                           enabled

abrt-vmcore.service                         enabled

abrt-xorg.service                           enabled

abrtd.service                               enabled

accounts-daemon.service                     enabled

atd.service                                 enabled

auditd.service                              enabled

avahi-daemon.service                        enabled

bluetooth.service                           enabled

chronyd.service                             enabled

crond.service                               enabled

cups.service                                enabled

dbus-org.bluez.service                      enabled

dbus-org.fedoraproject.FirewallD1.service   enabled

dbus-org.freedesktop.Avahi.service          enabled

dbus-org.freedesktop.ModemManager1.service  enabled

dbus-org.freedesktop.NetworkManager.service enabled

dbus-org.freedesktop.nm-dispatcher.service  enabled

display-manager.service                     enabled

dmraid-activation.service                   enabled

firewalld.service                           enabled

firstboot-graphical.service                 enabled

gdm.service                                 enabled

getty@.service                              enabled

hypervkvpd.service                          enabled

hypervvssd.service                          enabled

irqbalance.service                          enabled

iscsi.service                               enabled

ksm.service                                 enabled

ksmtuned.service                            enabled

libstoragemgmt.service                      enabled

libvirtd.service                            enabled

lvm2-monitor.service                        enabled

mdmonitor.service                           enabled

microcode.service                           enabled

ModemManager.service                        enabled

multipathd.service                          enabled

NetworkManager-dispatcher.service           enabled

NetworkManager.service                      enabled

nfs-lock.service                            enabled

packagekit-offline-update.service           enabled

postfix.service                             enabled

rhsmcertd.service                           enabled

rngd.service                                enabled

rpcbind.service                             enabled

rsyslog.service                             enabled

rtkit-daemon.service                        enabled

smartd.service                              enabled

spice-vdagentd.service                      enabled

sshd.service                                enabled

sysstat.service                             enabled

systemd-readahead-collect.service           enabled

systemd-readahead-drop.service              enabled

systemd-readahead-replay.service            enabled

tuned.service                               enabled

vmtoolsd.service                            enabled

avahi-daemon.socket                         enabled

cups.socket                                 enabled

dm-event.socket                             enabled

iscsid.socket                               enabled

iscsiuio.socket                             enabled

lvm2-lvmetad.socket                         enabled

rpcbind.socket                              enabled

default.target                              enabled

graphical.target                            enabled

nfs.target                                  enabled

remote-fs.target                            enabled 

禁用防火墙

[root@rhel7 ~]# systemctl stop firewalld.service

[root@rhel7 ~]# systemctl disable firewalld.service

[root@rhel7 ~]# systemctl status firewalld.service

firewalld.service – firewalld – dynamic firewall daemon

   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled)

   Active: inactive (dead)

Jul  :: rhel7 systemd[]: Started firewalld – dynamic firewall daemon.

Jul  :: rhel7 systemd[]: Stopping firewalld – dynamic firewall daemon…

Jul  :: rhel7 systemd[]: Stopped firewalld – dynamic firewall daemon.

Jul  :: rhel7 systemd[]: Stopped firewalld – dynamic firewall daemon.

Jul  :: rhel7 systemd[]: Stopped firewalld – dynamic firewall daemon.

Jul  :: rhel7 systemd[]: Starting firewalld – dynamic firewall daemon…

Jul  :: rhel7 systemd[]: Started firewalld – dynamic firewall daemon.

Jul  :: rhel7 systemd[]: Stopping firewalld – dynamic firewall daemon…

Jul  :: rhel7 systemd[]: Stopped firewalld – dynamic firewall daemon.

Jul  :: rhel7 systemd[]: Stopped firewalld – dynamic firewall daemon.

启动一个服务：systemctl start firewalld.service

关闭一个服务：systemctl stop firewalld.service

重启一个服务：systemctl restart firewalld.service

显示一个服务的状态：systemctl status firewalld.service

在开机时启用一个服务：systemctl enable firewalld.service

在开机时禁用一个服务：systemctl disable firewalld.service

查看服务是否开机启动：systemctl is-enabled firewalld.service;echo $?

查看已启动的服务列表：systemctl list-unit-files|grep enabled