How do I troubleshoot a Linux error?

I'm getting a 'permission denied' error when trying to access a file in Linux. What should I do?

This error usually means you don't have the necessary permissions. You can check the file's permissions using the command ls -l filename.

I see that the permissions are set to 'rw-r--r--'. What does that mean?

It means the owner has read and write permissions, while the group and others have only read permissions. You might need to change the permissions using chmod.

How do I change the permissions?

You can use the command chmod 755 filename to give the owner full permissions and read/execute permissions to others.

Thanks! What if I need to change the owner of the file?

You can change the owner using the command chown newowner filename. Make sure you have the necessary privileges to do this.