單項選擇題

刪除/etc/httpd/conf/httpd.conf文件中空白行可以使用命令（）

A.grep“^$”/etc/httpd/conf/httpd.conf
B.sed-i“/^$/d”/etc/httpd/conf/httpd.conf
C.awk-i“/^$/d”/etc/httpd/conf/httpd.conf
D.cut“/^$/d”/etc/httpd/conf/httpd.conf

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