#visudo

How to Make sudo Remember the Password for Longer using Visudo

 The behaviour of sudo is configured in /etc/sudoers file and by default timeout of the sudo command is 15 minutes.

 The /etc/sudoers file has a timestamp_timeout option responsible for reprompting the user for password after specific amount of time. The good news is that you can increase this number to a larger one (in minutes) by adding a string in the /etc/sudoers file. After that time sudo will ask for password again.

 See https://linuxiac.com/make-sudo-remember-password-longer/

 #technology #linux #sudo #visudo

sudoers Configuration Provide Superuser Access To Normal User

SUDO means “Substitute for super user” or “Super user do”.  Using sudo access or sudoers configuration normal user can execute commands as root privileges without providing them an root user password. sudoers configuration

This sudoers configuration will make super power to manage/provide access to particular for user, for particular command access. Even we can deny access to particular command…

Sudo and Su Configuration Examples

Sudo and SU

As well all know, at least I hope we do, Sudo (aka “Super Do”) and Su (aka Super User/Substitute User) are the utilities in Linux that allow a regular user to acquire elevated permissions to complete common system tasks. Of course, if configured securely, Sudo and Su will only allow a user to complete certain tasks. On the other hand, if sudo and su are configured incorrectly, it…

Fix: How to modify a invalid /etc/sudoers file? It throws out an error and not allowing me to edit again #it #development #answer

How to modify a invalid /etc/sudoers file? It throws out an error and not allowing me to edit again

How do I edit an invalid visudo file?

Here is what happens:

$ sudo visudo >>> /etc/sudoers: syntax error near line 28 <<< sudo: parse error in /etc/sudoers near line 28 sudo: no valid sudoers sources found, quitting

Answer [by Eliah Kagan]: How to modify a invalid /etc/sudoers file? It throws…

Ubuntu 사용자 추가

adduser <#UserId#>

그렇게 추가한 사용자로 로그인한 후 sudo 명령어로 root 권한을 얻으려 할 때 <#UserId#> is not in the sudoers file. This incident will be reported. 라면서 root 권한을 얻지 못한다면_!?

응_? sudoers 파일은 뭐지… ( 당황. 바로 검색. )

결론은 대략 sudo 명령어에 대한 설정을 다루는 파일이고 추가한 사용자에 대한 정보를 수정해줘야 한다는 것.

root로 로그인한 후 ( 관리자 권한이 필요한데 sudo 가 안되니깐… )

visudo -f /etc/sudoers 로 파일을 열고

sudoers 파일의 경우 일반 vi 가 아닌 visudo 를 쓰는데 저장할 때 문법 체크도 해준다고 한다.

root ALL=(ALL:ALL) ALL 다음 라인에 <#UserId#> ALL=(ALL:ALL) ALL을 넣어준다.

저장하면 끝

출처

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