[Linux/error]trouble shooting

1. virtual Box 부팅 에러

• 해결

1. 제어판 프로그램 및 기능옵션 이용
   

2. LInux용 window 하위 시스템 check
   

3. window 재부팅 후 재 설치
   

2. 시간 설정 에러

• 현시간
  

root@il:~# date
Sun Apr 30 04:15:08 AM UTC 2023 - 영국시간으로 출력!

• 해결

root@il:~# tzselect			- tzdata 다운받으면 자동 가능
Please identify a location so that time zone rules can be set correctly.
Please select a continent, ocean, "coord", or "TZ".
 1) Africa
 2) Americas
 3) Antarctica
 4) Asia
 5) Atlantic Ocean
 6) Australia
 7) Europe
 8) Indian Ocean
 9) Pacific Ocean
10) coord - I want to use geographical coordinates.
11) TZ - I want to specify the timezone using the Posix TZ format.
#? 4
Please select a country whose clocks agree with yours.
 1) Afghanistan              29) Kyrgyzstan
 2) Antarctica               30) Laos
 3) Armenia                  31) Lebanon
 4) Azerbaijan               32) Macau
 5) Bahrain                  33) Malaysia
 6) Bangladesh               34) Mongolia
 7) Bhutan                   35) Myanmar (Burma)
 8) Brunei                   36) Nepal
 9) Cambodia                 37) Oman
10) China                    38) Pakistan
11) Christmas Island         39) Palestine
12) Cocos (Keeling) Islands  40) Philippines
13) Cyprus                   41) Qatar
14) East Timor               42) Réunion
15) French S. Terr.          43) Russia
16) Georgia                  44) Saudi Arabia
17) Hong Kong                45) Seychelles
18) India                    46) Singapore
19) Indonesia                47) Sri Lanka
20) Iran                     48) Syria
21) Iraq                     49) Taiwan
22) Israel                   50) Tajikistan
23) Japan                    51) Thailand
24) Jordan                   52) Turkmenistan
25) Kazakhstan               53) United Arab Emirates
26) Korea (North)            54) Uzbekistan
27) Korea (South)            55) Vietnam
28) Kuwait                   56) Yemen
#? 27

The following information has been given:

        Korea (South)

Therefore TZ='Asia/Seoul' will be used.
Selected time is now:   Sun Apr 30 13:15:03 KST 2023.
Universal Time is now:  Sun Apr 30 04:15:03 UTC 2023.
Is the above information OK?
1) Yes
2) No
#? 1

You can make this change permanent for yourself by appending the line
        TZ='Asia/Seoul'; export TZ
to the file '.profile' in your home directory; then log out and log in again.

Here is that TZ value again, this time on standard output so that you
can use the /usr/bin/tzselect command in shell scripts:
Asia/Seoul


root@il:~# date			- 변경 x 
Sun Apr 30 04:15:08 AM UTC 2023

• vi 편집하기

root@il:~# vi ~/.profile
 10 TZ-'ASIA/SEOUL'; export TZ

root@il:~# date
Sun Apr 30 01:34:31 PM KST 2023

강사님 방법 

root@il7@09:55:12:~# timedatectl set-timezone "Asia/Seoul"