WorkingWithRHEL7: Difference between revisions
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== Getting rid of firewalld and coming back to iptables == | |||
Here are the magic commands : | Here are the magic commands : | ||
<pre> | <pre> | ||
| Line 16: | Line 16: | ||
</pre> | </pre> | ||
== Replacing NetworkManager by network == | |||
First, check if there is the '''GATEWAY''' parameter in the ifcfg-ethX of the NIC. (GATEWAY0 is not working without NM) | First, check if there is the '''GATEWAY''' parameter in the ifcfg-ethX of the NIC. (GATEWAY0 is not working without NM) | ||
Then, type these commands : | Then, type these commands : | ||
| Line 28: | Line 28: | ||
</pre> | </pre> | ||
== Adoption of Predictable Network Interface Names == | |||
Names of NICs will change. To prepare yourself to the new naming rules, please read these documents : | Names of NICs will change. To prepare yourself to the new naming rules, please read these documents : | ||
*http://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames/ | *http://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames/ | ||
*http://blog.laimbock.com/2014/11/22/systemd-understanding-predictable-network-interface-names/ | *http://blog.laimbock.com/2014/11/22/systemd-understanding-predictable-network-interface-names/ | ||
== Default filesystem : xfs == | |||
RHEL7 adopts XFS as the default filesystem. It might generates troubles with our Quattor scdb -> check our filesystem layout templates. | RHEL7 adopts XFS as the default filesystem. It might generates troubles with our Quattor scdb -> check our filesystem layout templates. | ||
== Transition from SysVinit to Systemd == | |||
I find this [https://fedoraproject.org/wiki/SysVinit_to_Systemd_Cheatsheet link] useful. | I find this [https://fedoraproject.org/wiki/SysVinit_to_Systemd_Cheatsheet link] useful. | ||
Here are some useful commands : | Here are some useful commands : | ||
=== List types of unit === | |||
<pre> | <pre> | ||
systemctl -t help | systemctl -t help | ||
</pre> | </pre> | ||
=== List units of a certain type === | |||
<pre> | <pre> | ||
systemctl list-units --type=[unit_name] | systemctl list-units --type=[unit_name] | ||
</pre> | </pre> | ||
=== List of services === | |||
<pre> | <pre> | ||
systemctl list-units --type=service | systemctl list-units --type=service | ||
</pre> | </pre> | ||
=== Check status of services === | |||
<pre> | <pre> | ||
systemctl status [service_name] | systemctl status [service_name] | ||
| Line 62: | Line 62: | ||
systemctl is-active [service_name] | systemctl is-active [service_name] | ||
</pre> | </pre> | ||
=== Stop/start/restart service === | |||
<pre> | <pre> | ||
systemctl start [service_name] | systemctl start [service_name] | ||
| Line 68: | Line 68: | ||
systemctl restart [service_name] | systemctl restart [service_name] | ||
</pre> | </pre> | ||
=== Enable/disable at boot time === | |||
<pre> | <pre> | ||
systemctl enable [service_name] | systemctl enable [service_name] | ||
Latest revision as of 20:26, 24 March 2016
Getting rid of firewalld and coming back to iptables
Here are the magic commands :
systemctl stop firewalld systemctl disable firewalld yum remove firewalld yum install iptables-services systemctl enable iptables.service systemctl enable ip6tables.service
Don't forget to configure SSH with system-config-firewall-tui. And after that :
systemctl start iptables.service systemctl start ip6tables.service
Replacing NetworkManager by network
First, check if there is the GATEWAY parameter in the ifcfg-ethX of the NIC. (GATEWAY0 is not working without NM) Then, type these commands :
systemctl stop NetworkManager systemctl disable NetworkManager
And now, we can restart network :
service network restart
Adoption of Predictable Network Interface Names
Names of NICs will change. To prepare yourself to the new naming rules, please read these documents :
- http://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames/
- http://blog.laimbock.com/2014/11/22/systemd-understanding-predictable-network-interface-names/
Default filesystem : xfs
RHEL7 adopts XFS as the default filesystem. It might generates troubles with our Quattor scdb -> check our filesystem layout templates.
Transition from SysVinit to Systemd
I find this link useful.
Here are some useful commands :
List types of unit
systemctl -t help
List units of a certain type
systemctl list-units --type=[unit_name]
List of services
systemctl list-units --type=service
Check status of services
systemctl status [service_name]
If you want something more concise info :
systemctl is-enabled [service_name] systemctl is-active [service_name]
Stop/start/restart service
systemctl start [service_name] systemctl stop [service_name] systemctl restart [service_name]
Enable/disable at boot time
systemctl enable [service_name] systemctl disable [service_name]