[server]To Update Unbuntu Server

1. 최신 정보를 얻어오기
   
   Shell

   $sudo apt-get update

   1	$sudo apt-get update

2. 최신 정보로 서버를 갱신하기

   Shell

   $sudo apt-get upgrade

   1	$sudo apt-get upgrade

3. 간혹 다음과 같은 메시지가 뜰 때가 있다.

   Shell

   The link /vmlinuz.old is a damaged link Removing symbolic link vmlinuz.old you may need to re-run your boot loader[grub] The link /initrd.img.old is a damaged link Removing symbolic link initrd.img.old you may need to re-run your boot loader[grub]

   1 2 3 4 5 6

   The link /vmlinuz.old is a damaged link Removing symbolic link vmlinuz.old you may need to re-run your boot loader[grub] The link /initrd.img.old is a damaged link Removing symbolic link initrd.img.old you may need to re-run your boot loader[grub]

   이 때

   Shell

   $sudo update-grub

   1	$sudo update-grub

[reference]
http://askubuntu.com/questions/518997/how-do-i-re-run-boot-loader
https://www.euperia.com/linux/you-may-need-to-re-run-your-boot-loader-grub/1456

[more info]
– 파일이 깨져 업데이트 에러 발생
– AptGet/Howto