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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
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原文地址：http://my.oschina.net/yang1992/blog/519344
