下面哪个命令刷新打印机队列()。

A.lsmod

B.dirmod

C.modules

D.modlist

A.cat/proc/ioports

B.cat/proc/interrupts

C.cat/proc/memoryinfo

D.which interrupts

A.~/mail/

B./var/mail/

C./var/mail/spool/

D./var/spool/mail/

A.ping

B.init

C.telnet

D.netstat

A.md5

B.tar

C.crypt

D.md5sum

A.NFS

B.DNS

C.NIS

D.routing

A.管道

B.分级文件系统

C.字符型处理器

D.shell

A.Turbo linux

B.AT&TBell Laboratry

C.University ofHelsinki

D.Linus Torvalds

A.echo$HOME

B.echo$USERDIR

C.echo$ECHO

D.echo$ENV

A./etc/httpd

B./var/www/html

C./etc/home

D./home/httpd