A.mkdir
B.rmdir
C.mv
D.rm

A.p
B.c
C.s
D.l

A.cat file>filE.copy
B.cat filefilE.copy
C.&cat filefilE.copy
D.&cat file>filE.copy

A.cp shell.shshell2.sh
B.mv shell.shshell2.sh
C.ls shell.sh>shell2.sh
D.ll shell.sh>shell2.sh

A.umount
B.dismount
C.mount–u
D.从/etc/fstab中删除这个文件系统项

A.管道
B.输入输出重定向
C.执行后台进程
D.处理程序命令

A.467
B.674
C.476
D.764

A./home/jerry
B./bin/jerry
C./var/jerry
D./etc/jerry

A./etc/conf
B./etc/lilo.conf
C./proc/kcore
D./usr/local/

A.cp myfile  /dev/null
B.touch myfile
C.create myfile
D.mkfile myfile

A.bash
B.ash
C.csh
D.gnush