# Linux note

免密碼
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* First, if your user has sudo privileges, you must enable its NOPASSWD option. Otherwise, sudo will ask for a password even when you don't have one, and won't accept an empty password.
* To do so, open the sudoers configuration file with sudo visudo, and add the following line to the file, replacing david with your username:
* ``david ALL=(ALL) NOPASSWD:ALL``
* Close the editor to apply the changes, and test the effect on sudo in a new terminal.

* Delete the password for your user by running this command:
* ``sudo passwd -d `whoami``

自動登入
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* ``sudo mkdir /etc/systemd/system/[e-mail].d``
* ``sudo vim /etc/systemd/system/[e-mail].d/override.conf``
* 首先建立 [e-mail].d 目錄以及 override.conf 設定檔。

[Service]
ExecStart=
ExecStart=-/sbin/agetty --noissue --autologin 帳戶名稱 %I $TERM
Type=idle

###### tags: `Linux`