Bash shell script to convert all uppercase letters in a file to lowercase letters
kw.sh
#!/bin/bashecho'___________________________________________'echo'Script to convert Uppercase to Lowercase'echo'___________________________________________'echo"1.Uppercase to Lowercase"echo"2.Exit"echo'___________________________________________'echo-e"Enter Your Choice \c"read ch
case"$ch"in
1)echo-e"Enter The Filename \c"read f1
if[-f$f1]then
echo"Converting Uppercase to Lowercase"tr'[A-Z]''[a-z]' <$f1else
echo"$f1 File Does't Exists"fi;;
2)exit;;esac
Output
kodingwindow@kw:~$ bash kw.sh
___________________________________________
Script to convert Uppercase to Lowercase
___________________________________________
1.Uppercase to Lowercase
2.Exit
___________________________________________
Enter Your Choice 1
Enter The Filename kw.txt
Converting Uppercase to Lowercase
shell scripting is very easy
kodingwindow@kw:~$
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