Difference between “./” and “sh” in UNIX

Question

Sometimes i see that few scripts are executed through \"sh\" command and sometimes through \"./\" command.I am not able to understand the exact difference between them.Please he

Answer 1

when your file is not executable you can't run using ./file_name.sh normally you can run by sh file_name.sh if you change your file to executable chmod a+x file_name.sh you can run your file by ./file_name.sh