review what i studied `date` - 2017-4-24

zabbix action 不被触发的几个原因：
1、条件没配置好
例如匹配选项like
2、权限问题
action step中的用户或组 需对Trigger有可读权限

shell中的select语句 与 read 编写 出来的menu区别
select 只能选择输入数字来传递值
而menu 可以随意传递任何类型的值

相对于menu来说select更加简单

[root@localhost ~]# cat test.sh
#!/bin/bash
select DAY in Mon Tue Wed Thu Fri Sat Sun quit
#和for循环语法相似
do
if [ $DAY = "Mon" ];then
echo $DAY
fi
done
#END

[root@localhost ~]# ./test.sh
1) Mon
2) Tue
3) Wed
4) Thu
5) Fri
6) Sat
7) Sun
8) quit
#? 1
Mon

#select 最好就是与case 结合
[root@localhost ~]# cat ./test2.sh
#!/bin/bash
select DAY in Mon Tue Wed Thu Fri Sat Sun quit
do
case $DAY in
Mon)
echo "Today is Monday";;
Tue)
echo "Today is Tuesday";;
Wed)
echo "Today is Wednesday";;
Thu)
echo "Today is Thursday";;
Fri)
echo "Today is Friday";;
Sat|Sun)
echo "You can have a rest today";;
q|quit)
exit 0
;;
*)

echo "Unknown input ,exit now" && break;;
esac
done

[root@localhost ~]# ./test2.sh
1) Mon
2) Tue
3) Wed
4) Thu
5) Fri
6) Sat
7) Sun
8) quit
#? 2
Today is Tuesday
#? 1
Today is Monday
#? 8
[root@localhost ~]# echo $?
0