sudo bash, and not working script

pranav@inspiron-5548L:~$ sudo bash
root@inspiron-5548L:~# for package in $(apt-get upgrade 2>&1 | grep "warning: files list file for package '" | grep -Po "[^'\n ]+'" | grep -Po "[^']+"); do apt-get install --reinstall "$package"; done
root@inspiron-5548L:~# It did nothing, as u can see.