A.kill-121
B.kill-stop21
C.kill-621
D.kill-921

A.cshrc
B.login
C.profile
D.init

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.以上都不對

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