学习bash第六章 学习笔记

while getopts ":ab:c" opt; do
      case $opt in
           a ) process option -a;;
           b ) process option -b;;
           c ) process option -c;;
           /?) echo 'usage()....'
       esac
done
shift $(($OPTIND-1))

let count=0
while [$count -le $1]; do
      ....
done

name[2]=alice
name[3]=hatter
.....

names=([2]=alice [0]=hatter...)

names=(hatter [5]=duchess alice)

usage:
for i in "${name[@]}";do
    echo$i
done

for i in $(cut -f 1,3 -d: /etc/passwd) ; do
    array[${i#*:}]=${i%:*}

done
echo "user $1 is ${array[$1]}"