[Linux] Share environment variables with root user

Keep current user's env variables when running sudo command

Install docker in Ubuntu 20 and config network proxy

ๅœจUbuntu 20ไธญๅฎ‰่ฃ… Dockerใ€้…็ฝฎ็ฝ‘็ปœไปฃ็†

How to run fsck to check and fix filesystem of Ubuntu 20

/dev/sda1: UNEXPECTED INCONSISTENCY: RUN fsck MANUALLY. fsck exited with status code 4