Shell腳本 - 從用戶輸入4行

Question

我有個問題。 我需要讀取用戶輸入，但我需要用戶輸入4行。 每次用戶按下輸入時，它都會終止讀取命令，所以我讀了4次命令（不確定這是否正確） - 我需要幫助。 另外如何將用戶輸入輸出到文件中？ 而那個輸出也需要我4行。 請看我的劇本。 我感謝任何幫助。

1  #!/bin/bash


2  #Displaying user name, host name, time, and date

3  Time=`date +%r`
4  Date=`date +%m/%d/%Y`
5  echo "$USER is running this script on $HOST at $Time on $Date:"
6  echo""
7  echo  "Please enter 4 lines of text:  "
8  read line1
9  read line2
10 read line3
11 read line4
12 echo "I'm now putting the four lines you entered into a text file called \"mylines.txt\"..."
13 echo $line1\n $line2\n $line3 \n$line4 > lines.txt
14 echo""
15 echo "The lines you entered were:\n$line1\n$line2\n$line3\n$line4"
16 echo""

Answer 1

要讀取4行，您可以使用循環並將其存儲在數組中：

#!/bin/bash

lines=()
echo  "Please enter 4 lines of text:  "
for ((i=1; i<=4; i++)); do
   IFS= read -p "Enter line $i: " -r line && lines+=("$line")
done

然后打印並重定向它：

printf "%s\n" "${lines[@]}" > lines.txt

Answer 2

我不確定是否能得到你想要的......但是看看代碼的安靜

#!/bin/bash

myfile="file"

echo "a line im my file" > $myfile
echo "now a erased my file and create another with the same name" > $myfile
echo "now I'm writing at the end of my file" >> $myfile
echo "



now I put some lines in the end of my file" >> $myfile

如果您想要的是將一些行放入您的文件中，您可以這樣做：

echo $line1 > lines.txt
echo "



" + $line2 >> lines.txt
echo "



" + $line3 >> lines.txt
echo "



" + $line4 >> lines.txt

如果只是這樣，這可以做;）