shell script to replace a string in a file

shell script to replace a string in a file

Some times during automating any task, we may require to replace a string in a file.
Example:- I want to change “Linux” string with “Waseem” in a file called string.txt

cat replacestring.sh
#!/bin/bash
# Shell Script to replace string in a file
/bin/sed -i “s/Linux/Waseem/g” /PATH/TO/FILE/string.txt
exit 0;

Before:-
—————–
cat string.txt
Linux

Run the script:-
——————-
sh replacestring.sh

After:-
——————
cat string.txt
Waseem

Another way we can replace string by passing parameter,so that the script will be used dynamically.
cat replacestring.sh
#!/bin/bash
# Shell Script to replace string in a file
/bin/sed -i “s/$1/$2/g” /PATH/TO/FILE/string.txt
exit 0;

Run the script:-
—————–
sh replacestring.sh Linux Waseem

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