linux
我主要使用的是 ubuntu linux
群組
改變資料夾權限
chmod -R 777 目錄
新增使用者
ubuntu 的 useradd 不好用，登入之後會沒有 /home/user 的家目錄，因為：
useradd is a low level utility for adding users. On Debian, administrators should usually use adduser(8) instead.
所以應改用 adduser
root@localhost:~# sudo adduser ccc3
Adding user `ccc3' ...
Adding new group `ccc3' (1002) ...
Adding new user `ccc3' (1002) with group `ccc3' ...
Creating home directory `/home/ccc3' ...
Copying files from `/etc/skel' ...
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
Changing the user information for ccc3
Enter the new value, or press ENTER for the default
Full Name []: Chung-Chen Chen
Room Number []:
Work Phone []:
Home Phone []:
Other []:
Is the information correct? [Y/n] y
刪除使用者
$ deluser <user>