β apt-get update λͺ λ Ήμ μλ¬ λ°μ
# /usr/bin/apt-key: 57: cannot create /dev/null: Permission denied
![](https://www.zino.kr/wp-content/uploads/2022/09/Linux-usrbinapt-key-57-cannot-create-devnull-Permission-denied-ν΄κ²°-01.png)
- μλ¬κ° λ°μλλ /dev/null μλ
# rm -f /dev/null; apt-key list
![](https://www.zino.kr/wp-content/uploads/2022/09/Linux-usrbinapt-key-57-cannot-create-devnull-Permission-denied-ν΄κ²°-02.png)
μ¬μ ν μλ¬μ½λκ° λ°μνμλ€.
- μ¬λΆν ν μ λ°μ΄νΈ μλ
![](https://www.zino.kr/wp-content/uploads/2022/09/Linux-usrbinapt-key-57-cannot-create-devnull-Permission-denied-ν΄κ²°-03.png)
μ λ°μ΄νΈκ° μ μμ μΌλ‘ μ§νλμλ€…