Brief introduction of new characteristics of RHEL7 (II.)

System and service start control:

1, boot Manager: SYSTEMD

2, start the admin command: SYSTEMCTL

For example:

Systemctl Status UNIT

Systemctl Start UNIT

Systemctl Stop UNIT

Systemctl Restart UNIT

Systemctl Mask UNIT# rejects the service, prevents the installation from starting

Systemctl unmask UNIT# Cancel Disable, can install boot

Systemctl Reload UNIT

.......

Chkconfig--list is replaced by:==> Systemctl list-units

Set boot up or boot not on:

Systemctl Enable AutoFS corresponds to Rhel6:chkconfig autofs on

Systemctl Disable AutoFS corresponds to Rhel6:chkconfig autofs off

Start stop service:

Systemctl start AutoFS corresponds to Rhel6:service autofs start

Systemctl Stop AutoFS corresponds to Rhel6:service autofs stop

Editors and tools:

1, using GCC 4.8 As the default compilation tool (Rhel6 using: GCC 4.4)

2, using glibc 2.17 as the standard library (rhel6 using: glibc 2.12)

3, using GDB 7.6.1 as the compilation debugging tool (Rhel6 using: GdB 7.2)

4, Support Ruby 2.0(Rhel6:ruby 1.8)

5, Support Python 2.7.5 (rhel6:P Ython 2.6)

6, supports Java 6 and 7 (Rhel6:java 5,6,7)

Network configuration:

1, migrate the original network Configuration tool to the new NetworkManager

2, support new network aggregation mode team (like Bond, team more efficient, more secure, new technology)

3, replace the original NTPD (/etc/ntpd.conf) service with the Chronyd (/etc/chronyd.conf) service

4, the new FIREWALLD Firewall tool

Firewall-config #打开图形化界面命令

5, support the network name space convenient container-type virtual machine management

------------------Firewall Settings comparison:

Allow external access to local 80 ports

RHEL6:

Iptables-a input-p TCP--dport 80-j ACCEPT# temporarily in effect

Service Iptables Save# saves settings and is permanently active

RHEL7:

Firewall-cmd--permanent--add-service=http#--permanent continues to take effect,--runtime temporary entry into force

Firewall-cmd--reload# re-read the configuration to make the configuration effective

This article is from the "Bug" blog, please be sure to keep this source http://chongzi100.blog.51cto.com/340243/1591101

Brief introduction of new characteristics of RHEL7 (II.)