现象：
在修改⽹卡配置的ip后，
service network restart
后/f就会被修改为之前的值。
搜了⼀些⽅法：
confmy.oschina/HIJAY/blog/223118
my.oschina/HIJAY/blog/223140
但是不能⽣效。但是从这⾥⽂章中发现NetworkManager是⼀个service，因此顺⼿执⾏了
service  NetworkManager  status
输出：
[root@localhost ~]# service NetworkManager status
Redirecting to /bin/systemctl status NetworkManager.service
NetworkManager.service - Network Manager
Loaded: loaded (/usr/lib/systemd/system/NetworkManager.service; disabled; vendor preset: enabled)
Active: inactive (dead) since Wed 2020-09-09 04:56:10 CAT; 18min ago
Docs: man:NetworkManager(8)
Main PID: 1157 (code=exited, status=0/SUCCESS)
Sep 09 04:54:11 localhost.localdomain NetworkManager[1157]:  [1599620051.6457] device (ens33): carrier: link connected Sep 09 04:54:11 localhost.localdomain NetworkManager[1157]:  [1599620051.6672] ifcfg-rh: cannot load
/etc/sysconfig/network-scripts/ifcfg-ens33.L5 due b,"ens33")
Sep 09 04:54:11 localhost.localdomain NetworkManager[1157]:  [1599620051.6859] ifcfg-rh: cannot lo
ad
/etc/sysconfig/network-scripts/ifcfg-ens33.L5 due b,"ens33")
Sep 09 04:54:15 localhost.localdomain NetworkManager[1157]:  [1599620055.7753] ifcfg-rh: cannot load
/etc/sysconfig/network-scripts/ifcfg-ens33.L5 due b,"ens33")
Sep 09 04:54:15 localhost.localdomain NetworkManager[1157]:  [1599620055.8549] ifcfg-rh: cannot load
/etc/sysconfig/network-scripts/ifcfg-ens33.L5 due b,"ens33")
Sep 09 04:56:10 localhost.localdomain NetworkManager[1157]:  [1599620170.3910] caught SIGTERM, shutting down normally.
Sep 09 04:56:10 localhost.localdomain systemd[1]: Stopping
Sep 09 04:56:10 localhost.localdomain NetworkManager[1157]:  [1599620170.3985] manager: NetworkManager state is now CONNECTED_SITE
Sep 09 04:56:10 localhost.localdomain NetworkManager[1157]:  [1599620170.4011] exiting (success)
Sep 09 04:56:10 localhost.localdomain systemd[1]: Stopped Network Manager.
Hint: Some lines were ellipsized, use -l to show in full.
原来是之前复制的
/etc/sysconfig/network-scripts/ifcfg-ens33.L5
配置⽂件也被NetworkManager解析使⽤了。这个⽂件是多余的，复制⾃ifcfg-ens33。
因此把⽂件挪⾛，重新
service network restart
此时f就不会再被修改了。

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