Switch back to the root user using the su command and run the rcdb2 stop and rcdb2 start commands.
使用su命令切换回根用户，然后运行rcdb2stop和 rcdb2start 命令。
A root user who has all permissions on a UNIX or Linux machine tries to switch his identity to a db2 instance user (for example, db2ins95) and tamper with some db2 processes.
拥有UNIX或Linux机器上所有权限的根用户试图切换身份到db 2实例用户(例如，db2ins95)并篡改某些db 2进程。
If you are logged in as an ordinary user, you will either use su - to switch to root or sudo.
如果您作为一个普通用户登录，您可以使用su-切换到根目录或者sudo。
The cannot mount rootfs error always happens when your system tries to switch the initrd root file system to the real root file system disk with the device name in this configuration.
当系统尝试将initrd根文件系统切换到拥有此配置中的设备名称的实际根文件系统磁盘时，经常会出现can notmount rootfs错误。
Any number of arbitrary steps can then be performed in this initial environment before the real root is mounted and we switch to using the real root and destroy the initial RAM disk.
在安装真实的根、切换为使用真实的根并销毁initialRAMdisk之前，任何步骤都可以在此初始环境中执行。
Switch your rescue system root to your sysroot so that you can access the root file system of the problem server system.
将恢复系统根目录切换为sysroot，以便您可以访问问题服务器系统的根文件系统。
Switch to the root account, and in five minutes you have it installed and ready to use without rebooting.
切换到根用户，5分钟它就安装好并且在没有重启的情况下投入使用。
For fuller access, switch to a root node in the domain.
要进行完整权限的访问，请在域中切换到根节点。
So in order for capabilities to be useful, a root process must be able to irrevocably switch its uid to non-zero while keeping a few capabilities.
所以为了能够使用能力并保证系统安全，根进程必须能够不可逆转地将它的uid切换到非0，同时保留一些能力。
For example, a program that needs a single root privilege may get started as root (say, by being setuid root) and then switch to running as a less-privileged user.
例如，需要个别的root特权的程序可能以root身份启动(比如说，通过成为setuid root)然后切换到以较少特权用户身份运行。
More complicated programs make use of saved uids to switch back and forth between root and a non-root user.
更复杂的程序使用保存的uid在根用户和非根用户之间来回切换。
Typically, su accounts are setup so that a user can temporarily switch to another account, for example the root user or an application owner.
通常，通过设置su账户让用户可以临时切换为另一个账户，例如root用户或应用程序所有者。
Ubuntu has done a lot to popularize sudo by enforcing its use in place of encouraging users to use su to switch to the root account to install software and perform other administrative tasks.
Ubuntu在普及sudo上做了不少工作，强迫而非鼓励用户使用su转换到root帐号安装软件和执行其他管理任务。
Press Ctrl + Alt + F1 to switch to a console view, and log in as root (or use sudo from your normal user account in Ubuntu).
按下Ctrl +Alt +F1进入控制台模式，以root身份登录(或者用你在ubuntu中的普通账户使用sudo命令)。
Press Ctrl + Alt + F1 to switch to a console view, and log in as root (or use sudo from your normal user account in Ubuntu).
按下Ctrl +Alt +F1进入控制台模式，以root身份登录(或者用你在ubuntu中的普通账户使用sudo命令)。
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