Which variable defines the directories in which a Bash shell searches for executable commands?
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A. B. C. D. E.C
The correct answer is C. PATH.
The PATH environment variable defines the directories that the Bash shell searches for executable commands. Whenever a user types a command in the terminal, the Bash shell looks for the executable file in each directory specified in the PATH variable, in the order they are listed.
The PATH variable is a colon-separated list of directories. For example, the default PATH variable on a Linux system may look like this:
javascript/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin This means that the shell will look for executable commands first in the /usr/local/bin directory, then in the /usr/bin directory, then in the /bin directory, and so on.
To view the current value of the PATH variable, you can use the echo command with the $PATH variable:
shell$ echo $PATH To add a directory to the PATH variable, you can use the export command, like this:
ruby$ export PATH=$PATH:/my/new/directory This adds the /my/new/directory directory to the end of the existing PATH variable.
To make this change permanent, you can add the export command to the ~/.bashrc file, which is a script that is executed every time a new Bash shell is opened.