单项选择题
A.grep“^$” etc httpd conf httpd.confB.sed-i“ ^$ d” etc ……
删除/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