関連ワード:  sed command to replace a string in a file    sed command to replace a string    sed command to replace a string in all files in a directory    sed command to replace a string in multiple files    sed command to replace a string with special characters    sed command to replace a string in a file and save    sed command to replace a string in linux    sed command to replace a string in a directory    sed command to replace a string with variable value    sed command to replace a string in shell script