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出现这个问题可能是使用了游客登录 将guest游客切换为普通用户 切换方法:
1 [root@Centos ~]# cat /etc/sudoers # Sudoers allows particular users to run various commands as ## Examples are provided at the bottom of the file for collections ## of related commands, which can then be delegated out to particular ## users or groups. ## This file must be ...
[test@localhost root]$ sudo ls We trust you have received the usual lecture from the local System Administrator. It usually boils down to these three things: #1) Respect the privacy of others. #2) Think before you type. #3) With great power comes great responsibility. ...
When you use a single root password, the only way to de-authorize users is to change the root password. sudo can be setup with a much more fine-grained security policy. The root account password does not need to be shared with everybody who needs to perform some type of ...
首次使用会要求你输入当前用户的密码,系统确实输入正确即以 root 权限来执行 mount 命令,接下来一段时间(默认为5分钟)再次使用 sudo 命令就不需要输密码了。 情景二:vim 编辑后发现忘记使用 sudo 我们经常会遇到这样的一个囧境:使用 vim 对某个文件进行编辑,编辑完之后,按 ESC 之后回到普通模式,再按 :wq 准备...
[yuw001@Centos~]$ hostname linuxhostname:you must be root to change the host name[yuw001@Centos~]$/bin/hostname linuxhostname:you must be root to change the host name[yuw001@Centos~]$ sudo hostname linux[root@linux~]# 退出重新登陆后发现主机名修改成功 ...
* Set real, effective and saved uids to root. * We will change the euid as needed below. */ setuid(ROOT_UID); // [...] /* Find a temporary directory writable by the user. */ set_tmpdir(&user_details.cred); // [...] ...
黑客可利用sudo获得 root权限 最近,sudo官网爆出目前sudo工具的一个高危漏洞,漏洞编号为:CVE-2019-18634,黑客可通过工具获得Linux的root权限(root具有Linux操作系统的最高权限)。 sudo 是Unix和Linux操作系统广泛使用的工具,这次漏洞是一个是一个堆栈缓冲溢出 bug,这个漏洞在启用了 pwfeedback 的系统中很容易利用,该...