SHELL脚本对LINUX下指定文本文件的满足条件的行的特定位置字符串进行...答:YDAY=$(date +"%Y%m%d" -d "-1 days")TDAY=$(date +"%Y%m%d")awk -v YDAY=$YDAY -v TDAY=$TDAY 'NR==1 {if(substr($0,20,8)==YDAY) $0=substr($0,1,19) TDAY substr($0,28)if(substr($0,34,8)==YDAY) $0=substr($0,1,33) TDAY substr($0,42)}/^...