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| A variable that contains a list of directories that are searched for executable files when a user enters a command. |
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| The default shell that is used on Red Hat Enterprise Linux. |
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| A file that is created in the /dev directory and that is used to represent and interact with a device. |
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| The collection of settings that users or processes are using to do their work. |
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| A command that exists as a file on disk. |
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| A pointer that is used by a Linux process to refer to files that are in use by the process. |
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| A command that is a part of the shell and does not exist as a file on disk. |
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| The shell that is opened directly after a user has logged in. |
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Term
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Definition
| A structure that can be used to forward the output of one command to be used as input for another command. |
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Term
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Definition
| A command such as <, >, or | that allows you to tell programs and commands where to display their output |
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Definition
| The environment from which commands can be executed. |
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Definition
| The default location where a program sends error messages. |
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Term
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Definition
| The default location where a program gets its input. |
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Term
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Definition
| The default location where a program sends its regular output. |
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Term
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Definition
| A shell that is started from another shell. Typically, a subshell is started by running a shell script. |
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Term
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Definition
| A label that contains a specific value that can be changed dynamically. |
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