Linux-SHELL

declare的用法

-i 声明整数

-a 声明数组

-f 声明函数

-r 声明只读

SHELL中对于数组的使用示例

#mysql -uroot  -e"show slave status\G" |grep -E 'Running|Seconds_Behind_Master'

             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
        Seconds_Behind_Master: 0
      Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it

#declare -a result

#result=($(mysql -uroot -e"show slave status\G" |grep -E 'Running|Seconds_Behind_Master'|awk '{print $2}'))
#echo ${result}
Yes
#echo ${result[0]}
Yes
#echo ${result[1]}
Yes
#echo ${result[2]}
0
#echo ${result[3]}