shell命令记录

如何去除shell中字符串的首尾字符

参考链接:

• https://blog.csdn.net/weixin_28746207/article/details/116606020

例如当前有如下变量,值为字符串:

var="[[{"/": "bafy2bzacea3buvu24ws5r2juchuwrhkbqbym6blkqyccw52adzvzvx4vrpjx4"},{"/": "bafy2bzacedo3v6yrjslwrinrjtsiajuol2iht2tm5mywzjnbwuhwa3bkcdijk"}]]"

我们想要去掉var变量的首个字符[和结尾字符],其实可以这样做:

var=`echo ${var:1:-1}`

输出结果为

[{"/": "bafy2bzacea3buvu24ws5r2juchuwrhkbqbym6blkqyccw52adzvzvx4vrpjx4"},{"/": "bafy2bzacedo3v6yrjslwrinrjtsiajuol2iht2tm5mywzjnbwuhwa3bkcdijk"}]