题目
A./etc
B./etc/yum
C./etc/yum.repos.d
D./var/yum.repos.d
第4题
A./etc/sysconfig/network-scripts/
B./etc/sysconfig/network-scripts/ifcfg-ens33
C./etc/sysconfig/network-scripts/ifup
D./etc/sysconfig/network-scripts/ifdown
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