如何使用Shell脚本和sed删除文本文件中的字符串后缀？

Question

I have a text file named file.txt with the following content.

customer 
#line1-customer
security-team
#line1-security 

I want only want to remove the # of #line1 under customer inside this file using shell script

My script

#!/bin/bash
string1="#line1-customer"
prefix=#

cat file.text | while read LINE
do
  if [ "$LINE" == "$string1" ]; then
  sed -i 's/"$LINE"/"$LINE#"$prefix""/g' file.text
done

After executing, no error was found. But i checked the file.txt and it was still the same (the # was not removed)

How can i achieve my goal?

Answer 1

If I understand correctly, you want to remove the first character of the line starting with the pattern contained in the variable string1 .

If so, no need for bash script, a single sed script is enough:

string1="#line1"
sed -i "/^${string1}/s/.\(.*\)$/\1/" file.txt