摘要： 一、IFS 介绍 Shell 脚本中有个变量叫IFS(Internal Field Seprator)，内部域分隔符。完整定义是The shell uses the value stored in IFS, which is thespace, tab, and newlinecharacters by default, to delimit words for the read and set commands, when parsing output from command substitution, and when performing variable substitution.. 阅读全文