shell学习

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Shell 学习

因为平时写 Shell 脚本比较多，并且 Shell 的语法规则比较零散，这里做一些学习和实践总结。

Shell 字典

字典的声明

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declare -A all_service

字典的赋值

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all_service=([key1]="value1" [key2]="value2" [key3]="vlaue3")

字典的取值

取 value 值
如取 key1 对应的 value1：

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${all_service[key1]}

如取所有的 value：

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${all_service[*]}

取key值
如取所有的 key：

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${!all_service[*]}

示例

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#!/bin/bash

declare -A all_service
all_service=([ntpd]="on" [lldpad]="on" [firewalld]="off")
echo "---Get value1---"
echo ${all_service[ntpd]}

echo "---Get all values---"
echo ${all_service[*]}

echo "---Get all keys---"
echo ${!all_service[*]}

echo "---Get all key:value pairs---"
for services in $(echo ${!all_service[*]});
do
        echo "${services} : ${all_service[${services}]}"
done

运行结果

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>sh test.sh
---Get value1---
on
---Get all values---
on on off
---Get all keys---
lldpad ntpd firewalld
---Get all key:value pairs---
lldpad : on
ntpd : on
firewalld : off

参考
[1] https://blog.csdn.net/jeremy_yangt/article/details/49100773
[2] https://blog.csdn.net/u014297722/article/details/54601660?utm_source=itdadao&utm_medium=referral