[windows]ping itsafe& environment variable

(1) When you ping a computer from Itsafe,the ping command should return the local IP address.

(2) The role and difference between Windows system environment variables and user environment variables

The role of environment variables:

Now only a function, in the Use of DOS window execution instructions, when we want to execute a program, we need to reach the directory where the program to execute normally, and the path variable in the environment variable can specify a default path for the system, when we execute the instruction, The system will be found in the current directory of the program is not executable, if not, go to the path of the environment variable, find the path in the path, see if there are executable programs, when the first program to stop the execution, if the query ended, still no discovery program, the display "XXX is not internal or external command." The priority of the environment variable is not discussed.

[windows]ping itsafe& environment variable