Category: 读书记录

The Spring Expression Language (SpEL) is a powerful expression language that supports querying and manipulating an object graph at runtime.

使用arping检查ip冲突. [root@node1 ~]# arping -I enp4s0f0 192.168.11.3 ARPING 192.168.11.3 from 192.168.12.196 enp4s0f0 Unicast reply from 192.168.11.3 [18:C0:4D:1D:AA:7C] 0.683ms Unicast reply from 192.168.11.3 [18:C0:4D:1D:AA:7C] 0.551ms Unicast reply from 192.168.11.3 [18:C0:4D:1D:AA:7C] 0.562ms Unicast reply from 192.168.11.3 [18:C0:4D:1D:AA:7C] 0.548ms 如果返回的mac 地址有多个, 说明这个局域网出现ip冲突.

rpm -qi $(rpm -qf $(which ls |grep -v ^alias))

研究它是否适合自己发展或者居住.
除了关注 GDP 总量之外, 还要结合城市特点关注其它几个表的数据.