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Answer :
Shell variables are local to the current shell session, while environment variables are accessible to all processes running on the system.
In Linux, shell variables and environment variables are two types of variables used to store data or information. Shell variables are local to the current shell session and are only accessible within that session. They are typically used to store temporary or intermediate values that are specific to a particular shell script.
On the other hand, environment variables are accessible to all processes running on the system, including different shell sessions. They are often used to store configuration information or system-wide values that need to be available to multiple programs or scripts.
For example, if you set a shell variable using the command 'my_var=hello', it will only be accessible within the current shell session. However, if you set an environment variable using the command 'export my_var=hello', it will be accessible to all processes running on the system.
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Final answer:
The main difference between shell variables and environment variables in Linux is that shell variables are specific to the current shell session, while environment variables are available to all processes running on the system.
Explanation:
Shell variables are specific to the current shell session. They are used to store temporary data or configure the behavior of the shell. Shell variables are created and modified using the shell's built-in commands, such as 'set' or 'export'. These variables are only accessible within the current shell session and are not inherited by child processes.
Environment variables, on the other hand, are available to all processes running on the system. They can be accessed by any program or script. Environment variables are set using the 'export' command, and their values can be retrieved using the 'echo' command or accessed within programs. These variables are often used to define system-wide settings or provide information to programs. Environment variables are inherited by child processes from their parent processes.
In summary, shell variables are temporary and specific to the current shell session, while environment variables are accessible to all processes and can be used to define system-wide settings.
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