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本篇文章给大家分享的是有关如何理解Oracle Linux中的machine-id,小编觉得挺实用的,因此分享给大家学习,希望大家阅读完这篇文章后可以有所收获,话不多说,跟着小编一起来看看吧。
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machine-id的介绍:
The "machine-id" parameter is added from Oracle Linux 7.1 to identify the machine in the network. Therefor this parameter must be unique.
But when user clone the virtual machine that is installed OL7.1, the cloned virtual machine's "machine-id" is not changed, and some virtual machine have the same "machine-id".
User should change the "machine-id" of the cloned virtual machine.
改变machine-id的方法:
To execute the below operations on the cloned virtual machine with the "root" account.
1. Clear the original "machine-id".
The "machine-id" value is written in "/etc/machine-id".
User have to clear the original value of "machine-id" befor changing.
There are some ways to change the "/etc/machine-id" file, in this case, use the "cp" command to change the original value.
Example :
# cat /etc/machine-id
e2bd0adf084a4c289cf335da4cd2f4b4 * Original "machine-id".
#
# cp -f /dev/null /etc/machine-id
cp: overwrite '/etc/machine-id'? * Clear original value.
#
# cat /etc/machine-id
# * Value has been cleared.
2. Create the new "machine-id" value.
generate a new machine-id by the "systemd-machine-id-setup" command and set up to the "/etc/machine-id".
Example :
# cat /etc/machine-id
# * "/etc/machine-id" is empty.
# systemd-machine-id-setup
Initializing machine ID from random generator. * Success to generate and setup the new value.
#
# cat /etc/machine-id
dab09965986b4ea1ba34dc7a79bb2830 * New value of "machine-id".
#
以上就是如何理解Oracle Linux中的machine-id,小编相信有部分知识点可能是我们日常工作会见到或用到的。希望你能通过这篇文章学到更多知识。更多详情敬请关注创新互联行业资讯频道。