Linux Shell 逐行讀取檔案 ( txt , sh , csv等)
阿新 • • 發佈:2019-02-04
今天寫了一個簡單的 Linux Shell 逐行讀取檔案(txt,sh,csv....)的程式,記錄一下,有需要的朋友可以參考。
#!/bin/bash # Only 1 parameter ! if [ $# != 1 ];then echo " Usage: .\read.sh filename!"; exit fi # check the file ! if ! [ -f $1 ];then echo "file does not exist!" exit elif ! [ -r $1 ];then echo "file can not be read !" exit fi # PRESS ANY KEY TO CONTITUE ! read -p "begin to read $1 " # set IFS="\n" , read $1 file per line ! IFS=" " # i is the line number i=1 for line in `cat $1` do echo line $i:$line let "i=$i+1" done echo "Finished reading file by line ! "
程式雖然簡單,但是細節問題容易出錯,從而浪費寶貴的時間~
PS : 讀取到每一行的資料之後,可以配合使用 cut 命令解析這一行的資料~