Amul Agrawal's questions

my ubuntu 18.04 was working fine..suddenly something went wrong and when i restarted my laptop.my ubuntu's sound was gone.Its now showing Dummy output. when i try aplay -l it shows

aplay: device_list:270: no soundcards found... i have tried many things even resetting alsa..but nothing is working..

also windows is working fine

Problem Solved. link to the solution: https://www.linuxuprising.com/2018/06/fix-no-sound-dummy-output-issue-in.html

I wanted to change the name before hostname on my Ubuntu terminal (the x in x@y ) To do so I replaced old x in /etc/passwd and /etc/shadow with newname

Now when I am trying to open Ubuntu, its not opening up; it is redirecting me to lock screen