Linux_su: commandnotfounderror

Linux_su: commandnotfounderror-Linux general technology-Linux programming and kernel information. For details, refer to the following section. In linux, I found a problem. When I use the su command to become a Super User, some commands of the management system, such as shutdown, will give me a "bash: shutdown: command not found ". according to the general idea of solving the problem:

First, this command must exist and cannot be found. It is estimated that the path is incorrect. First, I checked the shutdown command location:/sbin/shutdown, then there is the Super User's search path: (you can get it through the environment variable)

Env:

PATH =/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/bin:/usr/X11R6/bin: /home/xishan/bin

After switching to the root user, I checked the environment variables of the root user:

PATH =/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin: /usr/sbin:/usr/bin:/usr/X11R6/bin:/root/bin

Obviously, the environment variables of super su users vary greatly. How can we get the root environment variables?

Does su have other usage? man su, read it.

Su [OPTION]... [-] [USER [ARG]...]

-,-L, -- login

Make the shell a login shell

It should be su-root/su-l/su -- login to log on as the root user.

The problem has been solved.

However, I have used the NETBSD system before. When using the su command, I can also use shutdown instead of other commands. These two system kernels are similar, should I be able to modify the environment variables for the purpose?

Vi ~ /. Bashrc

Added an export PATH = $ PATH:/sbin

After restarting, run the su command to access the Super User and check the environment variables,

PATH =/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/bin:/usr/X11R6/bin: /home/xishan/bin:/sbin

Added successfully, and then tested: shutdown, OK. You can use su directly next time.