What is the purpose of the 'alias' command in Linux?*1 pointa) Create symbolic linksb) Define custom commandsc) Manage environment variablesd) List system processes

The purpose of the 'alias' command in Linux is to define custom commands. This is option b) in your question.

Here is a step-by-step explanation:

1. The 'alias' command in Linux is a command in itself. It is used to create shortcuts or abbreviations for other commands.

2. This can be particularly useful if you frequently use a command with a long name or a command that requires a lot of options. Instead of typing the full command each time, you can create an alias that does the same thing.

3. For example, if you frequently use the command 'ls -l', you could create an alias called 'll' that performs the same function. To do this, you would type 'alias ll='ls -l'' into the command line.

4. Now, whenever you type 'll', the 'ls -l' command will be executed.

5. It's important to note that aliases are only available for the current session. If you want an alias to be available every time you open a terminal, you need to add the alias command to your .bashrc file.

So, the 'alias' command in Linux is used to define custom commands, not to create symbolic links, manage environment variables, or list system processes.