jk@duck ~/src> ./adduser.sh
the number of arguments wan not right,please check
jk@duck ~/src> add
addftinfo (Add information to troff font files for use with groff)
addr2line (Convert addresses into file names and line numbers.)
jk@duck ~/src> ./adduser.sh classlist.txt
the number of arguments wan not right,please check
jk@duck ~/src> ./adduser.sh classlist.txt duck
File classlist.txt exits
the name is already exist
jk@duck ~/src>