데이터 파일을 만든 후 ShellScript에서 사용하는 방법을 알아보겠습니다.
예제.1 - Read a File
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| #!/bin/bash
file='book.txt'
while read line; do
echo $line
done < $file
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| 1. Pro AngularJS
2. Learning JQuery
3. PHP Programming
4. CodeIgniter 3
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Pro AngularJS
Learning JQuery
PHP Programming
CodeIgniter 3
예제.2 - Reading file content from command line
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| Samsung
Nokia
LG
Symphony
iphone
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$ while read line; do echo $line; done < company.txt
Samsung
Nokia
LG
Symphony
iphone
예제.3 - Reading file content using script
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| #!/bin/bash
filename='company.txt'
n=1
while read line; do
# reading each line
echo "Line No. $n : $line"
n=$((n+1))
done < $filename
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Line No. 1 : Samsung
Line No. 2 : Nokia
Line No. 3 : LG
Line No. 4 : Symphony
Line No. 5 : iphone
예제.4 - Passing filename from the command line and reading the file
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| #!/bin/bash
filename=$1
while read line; do
# reading each line
echo $line
done < $filename
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$ ./readfile4.sh company.txt
Samsung
Nokia
LG
Symphony
iphone
예제.5 - Reading file by omitting backslash escape
-r 옵션을 주면 \ (escape) 문자를 그대로 출력할 수 있습니다.
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| #!/bin/bash
while read -r line; do
# Reading each line
echo $line
done < company2.txt
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| \Samsu\ng
\Nokia
\LG
\Symphony
\Apple
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$ ./readfile5.sh company2.txt
\Samsu\ng
\Nokia
\LG
\Symphony
\Apple