shell变量常用方法

变量之数组操作：

参考网址：http://www.jb51.net/article/55253.htm

#直接赋值
[root@local-yum yum.repos.d]# name[]=chengd
[root@local-yum yum.repos.d]# name[]=xrd
[root@local-yum yum.repos.d]# name[]=cxx
#小括号赋值
[root@local-yum yum.repos.d]# age=(  )
#遍历数组变量
[root@local-yum yum.repos.d]# for i in ${name[@]};do echo $i ;done
chengd
xrd
cxx
[root@local-yum yum.repos.d]# for i in ${age[@]};do echo $i ;done

#获取数组长度
[root@local-yum yum.repos.d]# echo ${#name[@]}

[root@local-yum yum.repos.d]# echo ${#age[*]}

#删除数组元素
[root@local-yum yum.repos.d]# unset name[]
[root@local-yum yum.repos.d]# echo ${#name[@]}

[root@local-yum yum.repos.d]# for i in ${name[@]};do echo $i ;done
chengd
cxx
#删除数组
[root@local-yum yum.repos.d]# unset name
[root@local-yum yum.repos.d]# echo ${#name[@]}

[root@local-yum yum.repos.d]# for i in ${name[@]};do echo $i ;done