將變數寫入檔案中特定行的末尾

將變數寫入檔案中特定行的末尾

我想添加一個變數結尾的一個具體的文件中的行file.txt。到目前為止我的程式碼:

#!/bin/bash    
read -p "What is the path of the repo? > " input
echo :$input  >> file.txt

我希望將其添加到結束2號線。例如,

file.txt
--------
before -
1.stuff 
2./home/retep/awesome

after -
1.stuff
2./home/retep/awesome:/home/retep/cool

答案1

這是 awk 的另一行:

#!/bin/bash    
read -p "What is the path of the repo? > " input

awk -v addition="$input" -v targetline=2 '
NR==targetline { print $0 ":" addition; next}
{print }' file.txt > file.tmp
mv file.tmp file.txt

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