#!/bin/bash

if [[ $# = 0 ]]
then
echo "Use -a <name> to connect to server with name <name>"
echo "Use -l command to get list of available servers with their names"
echo "Use -h to get this help message again"
exit 0
fi

while getopts a:lh option
do
case "${option}"
in
a) ADR=${OPTARG}
REQ=0
;;
l) REQ=1;;
h) echo "Use -a <name> to connect to server with name <name>"
echo "Use -l command to get list of available servers with their names"
echo "Use -h to get this help message again"
exit 0
;;
*) echo "Unavailable option, use $0 -h to get help";;
esac
done

declare -A NAMES
NAMES[ivs]='root@123.123.123.123'
NAMES[msu]='s02160069@prac.cs.msu.ru'

if [[ ${REQ} = 1 ]]
then
        echo "name  address"
        for ind in "${!NAMES[@]}"
        do
                echo "${ind}   ${NAMES[${ind}]}"
        done
        exit 0
else
        ssh ${NAMES[${ADR}]}
fi