A.groupadd–g 100staf
B.groupadd–g 100–sstaff
C.groupaddstaff–g id100
D.groupadd–g staff100

A.userdel–roracle
B.userdel–u1002
C.userdel–uidoracle
D.userdel–r1002

A.helpcp
B.cp/？
C.mancp
D.以上都不对

A.：q
B.：wq
C.：q!
D.q

A.rm–frDIRNAME
B.rmdirdir
C.rmfilename
D.userdel–romc

A.r-xrw---x
B.rwxrx---x
C.rwxr-x--x
D.rwx-x---x

A.rmdir newdir
B.mkdir newdir
C.rm dir-frnewdir
D.rm newdir

A.change password dusername
B.password change username
C.change username
D.passwd username

A./bin/sh
B./bin/csh
C./bin/ksh
D./bin/rsh

A.创建目录
B.删除目录
C.移动目录
D.修改目录