shell讀取檔案的每一行
寫法一:
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#!/bin/bash
while read line
do
echo $line
done < filename(待讀取的檔案)
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寫法二:
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#!/bin/bash
cat filename(待讀取的檔案) | while read line
do
echo $line
done
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寫法三:
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for line in `cat filename(待讀取的檔案)`
do
echo $line
done
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說明:
for逐行讀和while逐行讀是有區別的,如:
$ cat file
1111
2222
3333 4444 555
$ cat file | while read line; do echo $line; done
1111
2222
3333 4444 555
$ for line in $(<file); do echo $line; done
1111
2222
3333
4444
555