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How does the PATH command work?
PATH is an environmental variable in Linux and other Unix-like operating systems that tells the shell which directories to search for executable files (i.e., ready-to-run programs) in response to commands issued by a user.
How do I compare paths in bash?
Comparison Operators When comparing strings in Bash you can use the following operators: string1 = string2 and string1 == string2 – The equality operator returns true if the operands are equal. Use the = operator with the test [ command. Use the == operator with the [[ command for pattern matching.
How do I see PATH in Linux?
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- Use echo $PATH to view your path variables.
- Use find / -name “filename” –type f print to find the full path to a file.
- Use export PATH=$PATH:/new/directory to add a new directory to the path.
How to check the path of a command?
To check which files are executed when we run a specific command in the shell, use the which command as follows: We can use this check the path of the file that is executed by the shell when we run the sync command:
What happens when you run the which command?
If you execute a command, then the shell will execute the first instance it finds in your $PATH. In turn, if you run the which command, it will only display the first location it finds, even if there are more matches. To view all the matched locations, you can use the -a switch like this:
How to check the path of the sync command?
We can use this check the path of the file that is executed by the shell when we run the sync command: You can see that the shell has found the executable file of the sync command in the second path (i.e. /usr/bin) from those listed in the $PATH environment variable.
How does the shell check the path of a file?
When we type a command in the termial, the shell checks your PATH to find an executable with that name. There are often several directories in your PATH. This makes it hard for you to know where the file is located.