关于Oracle Linux中的machine-id

发布时间：2020-12-12 15:24:45 所属栏目：百科来源：网络整理

导读：关于Oracle Linux中的machine-id 参考自: How to Change the "machine-id" of Oracle Linux 7.1 and Later (Doc ID 2127429.1) machine-id的介绍: The "machine-id" parameter is added from Oracle Linux 7.1 to identify the machine in the network. There

关于Oracle Linux中的machine-id
参考自:

How to Change the "machine-id" of Oracle Linux 7.1 and Later (Doc ID 2127429.1)

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".

# 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". #

（编辑：李大同）

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