bash 操作搜索插入换行符

https://blog.csdn.net/weixin_32149443/article/details/112931182
https://blog.csdn.net/u011729865/article/details/71773840

打开文件sampleID.txt 搜索 替换成\n 换行副 保存到sampleID_form.txt
cat sampleID.txt|tr  " " "\n" > sampleID_form.txt