Variable of the execution file PATH: $ PATH (PATH variable Introduction)

Variable of the execution file PATH: $ PATH (PATH variable introduction) variable of the execution file PATH: $ PATH in Linux, PATH is the environment variable. When executing the command, the system will search for the execution file under the PATH defined by each PATH according to the PATH settings. The first searched file will be executed first. Input the echo $ PATH command. echo indicates "display", while $ in front of PATH indicates that the variable is followed, so the current PATH is displayed. [Html] [root @ localhost ~] # Echo $ PATH/opt/qtcreator-2.5.2/bin:/usr/local/Trolltech/Qt-4.7.4/bin:/usr/local/sbin:/usr/local/bin:/sbin: /bin:/usr/sbin:/usr/bin:/root/bin. You can see that/bin can find the corresponding execution file in PATH settings. PATH is a very important "variable" for execution files. It is mainly used to regulate the directory for command search. Each directory is ordered and separated.