千锋教育2023新版Linux教程，保姆级零基础Linux入门到精通全套视频

[root@aly tmp]# grep "com|cn|edu|net" 34.sh

[root@aly tmp]# egrep "com|cn|edu|net" 34.sh

[root@aly tmp]# vim 345.sh

[root@aly tmp]# vi 346.sh

[root@aly tmp]# sh 346.sh

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