Editing file in linux using bash

Question

say I have the following the text file :

.................
value1= "2000";
justAtext= "hello Text" 
..................................

my question is, is there any linux cmd that would allow me to search into the file for example for "value" and than replace the whole line with something else like:

.................
changedText= "Hello";
justAtext= "hello Text" 
..................................

thanks in advance for any hint!

Answer 1

Yes there are several methods for doing it. The fastest IMO:

---

input

.................
value1= "2000";
justAtext= "hello Text" 
..................................

Assume this text is on a file named foo.txt

---

elaboration

sed -iE 's/value1=.*/changedText= "Hello";/g' foo.txt

• -i -> replace content on the same file (omitting this option the output will be printed on the Standard Output)
• -E -> use regex

---

output

.................
changedText= "Hello";
justAtext= "hello Text" 
..................................