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:'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)}/^TH/{if(substr($0,21,8)==YDAY) $0=substr($0,1,20) TDAY substr($0,29)}{print }' 文件名 ...