Solved the problem [Thanks to google-(https://forums.fedoraforum.org/showthread.php?297277-xsane-can-access-USB-scanner-only-as-root)]. First tried to add user to group ‘lp’ via adduser command in the terminal… However, it returned error that group ‘lp’ does not exist in /etc/group file. So I looked for the scanner id by using ‘lsusb’ command. Then found the device id file in '/dev/usb/00*" Changed the group of the device id file to the group ‘lpadmin’ which was mentioned in /etc/group file, logged out and logged in and the scanner started working.