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查看当前linux版本，cat /etc/redhat-release
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Ctrl+Alt退出虚拟机箭头
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[root@jakEdu01 ~]# cat /etc/redhat-release
CentOS Linux release 7.6.1810 (Core)
[root@jakEdu01 ~]# cd /etc/sysconfig/network-scripts/
[root@jakEdu01 network-scripts]# ls
ifcfg-ens33 ifdown-ppp ifup-ib ifup-Team
ifcfg-lo ifdown-routes ifup-ippp ifup-TeamPort
ifdown ifdown-sit ifup-ipv6 ifup-tunnel
ifdown-bnep ifdown-Team ifup-isdn ifup-wireless
ifdown-eth ifdown-TeamPort ifup-plip init.ipv6-global
ifdown-ib ifdown-tunnel ifup-plusb network-functions
ifdown-ippp ifup ifup-post network-functions-ipv6
ifdown-ipv6 ifup-aliases ifup-ppp
ifdown-isdn ifup-bnep ifup-routes
ifdown-post ifup-eth ifup-sit
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