I need to make an interactive bash script where the user will input a word, for example 'xyz' and it will replace a word in a text file.
For example, I have a script called example.sh. When i run it, it should ask:
What is your name?:
and the user will input 'xyz'.
The script should take that input and replace 'username' inside a text file called userlist.txt to 'xyz'
to be more clear, I need user input to run
sed -i -e s/username/userinput/g userlist.txt
You can use the read builtin to read user input, and you can then use sed(1) to do the text replacement:
if read -p "What is your name? " name; then
sed -i~ -e "s/username/${name}/g" userlist.txt
else
# Error
fi
$name to sed like an argument: you are dynamically constructing a command using the value of $name, and so any characters in the variable that have special meaning to sed are treated as such. You'll need to preprocess the value of $name before using it with sed to quote such special characters: a non-trivial task.#!/bin/bash
echo "What is your name?"
read name
sed -i -e s/username/"$name"/g userlist.txt
