sshfind:主机信息快捷查找命令：shell版本

#!/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 "\t使用主机别名或别名部分关键字查找主机配置项信息，查找 ~/.ssh/config 文件内容."
	echo -e "\t注：脚本优先做主机别名全字匹配，没有结果再尝试模糊匹配."
    echo -e "\nUsage:\n\tsshfind [keyword]"
	echo -e "Example:\n\tsshfind racknerd"
}
# 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

hoststr=$1
##优先做主机别名全字匹配，如果查找不到，再做模糊匹配
##特别注意，主机别名中带有短横线-或者英文句号.等特殊符号可能会影响全字匹配（尝试sshfind n1；sshfind inner\\-n1）
if [[ $(sed -nr '/Host .*[^\-\.]*\b'$hoststr'\b.*/,/Host /{/Host .*\b'$hoststr'\b.*/{=};/Host [^\b'$hoststr'\b]/b;p}' ~/.ssh/config|wc -l) > 1 ]];then
sed -nr '/Host .*[^\-\.]*\b'$hoststr'\b.*/,/Host /{/Host .*\b'$hoststr'\b.*/{=};/Host [^\b'$hoststr'\b]/b;p}' ~/.ssh/config
echo -e "\n\t以上为全字匹配结果"
#echo -e "=========================================="
else
	#下面这行匹配不是很精准，备用；改用 sshfindline 依次进行精准匹配
	#sed -nr '/Host .*'$hoststr'.*/,/Host /{/Host .*'$hoststr'.*/{=};/Host [^'$hoststr']/b;p}' ~/.ssh/config
	hostlines=$(sed -nr '/Host .*'$hoststr'.*/,/Host /{/Host .*'$hoststr'.*/{=}}' ~/.ssh/config)
	for host in $(echo "$hostlines"|tr '\n' ' ');
	do
		echo -e "$host"
		sshfindline $host
	done
fi
#sed -nr '/Host .*'$hoststr'.*/,/Host /{/Host .*'$hoststr'.*/{=;D;N};/Host [^'$hoststr']/b;p}' ~/.ssh/config