#!/bin/bash 
#檢視所有主機的到期時間，按到期時間順序排列
echo -e "    查詢所有主機到期時間，按日期順序排列"
echo -e "    引數一可附加引數 (month/m) 檢視當月到期主機詳情;"
echo -e "    引數一可附加引數 (next/n) 檢視下月到期主機詳情;"
echo -e "    引數二可指定最多列出的主機，預設為-1，即列出全部匹配主機;"
echo -e "    Example：ssh-expire-time m 或 ssh-expire-time n;"
echo -e "    Example：ssh-expire-time m 2 （匹配兩次，只顯示到期前兩個）"
echo -e "    <<<<<===============================================>>>>>\n\n"
# if less than two arguments supplied, display usage
if [  $# -lt 1 ]
then
    cat ~/.ssh/config|grep 到期時間|sort
    exit 1
fi

##至多列出的主機個數
if [ ! -z "$2" ];then
grepCount=`expr $2 + 0`
else
grepCount=-1
fi


if [[ "$1" == "month" || "$1" == "m" ]];then
nowMonth=$(date +"%Y-%m")
echo -e "本月到期主機：\n"
hostIndex=0
#cat ~/.ssh/config|grep 到期時間|sort|grep -m $grepCount $nowMonth|sed -r 's/^.*('$nowMonth'.*)$/\1/ig'|\
#xargs -n 1 -i sh -c "echo -e '主機 $hostIndex';eval sshfindtime {};echo -e '\n============================\n';"
#hosts=`cat ~/.ssh/config|grep 到期時間|sort|grep -m $grepCount $nowMonth|sed -r 's/^.*('$nowMonth'.*)$/\1/ig'`;
#下述把時分秒替換掉，不關心
#hosts=`cat ~/.ssh/config|grep 到期時間|sort|grep -m $grepCount $nowMonth|sed -r -e 's/^.*('$nowMonth'.*)$/\1/ig' -e 's/[0-9]{1,2}:.*$//ig'`;

##下為新方式，最終改用 sshfindline 查詢，適配多主機同一天到期
hosts=`grep -n '' ~/.ssh/config|grep 到期時間|sort -t ':' -k2|grep $nowMonth|cut -d ':' -f1|grep -m $grepCount ''`
#OLD_IFS=$IFS
#IFS="\n\b"

for host in $hosts;
do 
let hostIndex+=1
echo -e "主機：【$hostIndex】\n┏==============================================┓\n"
sshfindline $host
echo -e "\n┗==============================================┛\n\n"
done
#IFS=$OLD_IFS
if [ $grepCount -eq -1 -o $hostIndex -lt $grepCount ];then
echo "共找到 $hostIndex 個主機"
fi
exit 0
fi

if [[ "$1" == "next" || "$1" == "n" ]];then
month=`date +"%m"`
##月份跨年處理
if [ $month -eq 12 ];then
	month=0
	year=`date +"%Y"`
	Nextmonth=$(expr $year + 1 )"\-0?"$(expr $month + 1 )"[^0-9]+"
else
	Nextmonth=`date +"%Y\-0?"`$(expr $month + 1 )"[^0-9]+"
fi

echo -e "下月到期主機：\n"
#cat ~/.ssh/config|grep 到期時間|sort|grep -m $grepCount $Nextmonth|sed -r 's/^.*('$Nextmonth'.*)$/\1/ig'|\
#xargs -n 1 -i sh -c "eval sshfindtime {};echo -e '\n============================\n';"
hostIndex=0

##下為原始方式，不能區分同一天多臺主機到期的情況
hosts=`cat ~/.ssh/config|grep 到期時間|sort|grep -m $grepCount $Nextmonth|sed -r -e 's/^.*('$Nextmonth'.*)$/\1/ig' -e 's/[0-9]{1,2}:.*$//ig'`;

##下為新方式，最終改用 sshfindline 查詢，適配多主機同一天到期
hosts=`grep -n '' ~/.ssh/config|grep 到期時間|sort -t ':' -k2|grep -E $Nextmonth|cut -d ':' -f1|grep -m $grepCount ''`

for host in $hosts;
do 
let hostIndex+=1
echo -e "主機：【$hostIndex】\n┏==============================================┓\n"

sshfindline $host
echo -e "\n┗==============================================┛\n\n"
done
if [ $grepCount -eq -1 -o $hostIndex -lt $grepCount ];then
echo "共找到 $hostIndex 個主機"
fi
exit 0
fi

 

附: 依賴指令碼sshfindline：

#!/bin/bash 
SCRIPTPATH=$(realpath $0)
#SCRIPTPATH="$( cd "$(dirname "$0")" >/dev/null 2>&1 ; pwd -P )"
#SCRIPTPATH=$(dirname $(readlink -f "$0"))

display_usage() {
	echo -e "$SCRIPTPATH\n"
    echo -e "\tSSH行號查詢主機：傳遞行號，通過查詢 ~/.ssh/config 匹配對應行;\n\t輸出前後行主機各配置項完整資訊."
    echo -e "\nUsage:\n\tsshfindline [line-number]"
	echo -e "Example:\n\tsshfindline 105"
}
# if less than two arguments supplied, display usage
if [  $# -lt 1 ]
then
    display_usage
    exit 1
fi

# check whether user had supplied -h or --help . If yes display usage
if [[ ( $* == "--help") ||  $* == "-h" ]]
then
    display_usage
    exit 0
fi

linenumber=$1

#給檔案每一行加上行號：
#grep -n '' ~/.ssh/config

hostStartLine=$(grep -n '' ~/.ssh/config|tac|tail -n $linenumber|grep -iE -m 1 ':Host '|cut -d ':' -f1)
hostAlias=$(sed -n "${hostStartLine}p" ~/.ssh/config)
echo $hostAlias
sed -nr $hostStartLine',/Host /{/Host /b;p}' ~/.ssh/config