👉 The "exceed IO" error, often encountered in Unix-like operating systems, occurs when a process attempts to write more data to a file or device than it has permission to, typically due to insufficient I/O permissions. This can happen if the process is run with a different user ID or if the file system lacks the necessary permissions for the operation. For example, if a script running as a regular user tries to append to a log file owned by another user, it might fail with this error. To resolve it, you need to ensure the process has the appropriate I/O permissions, which can be achieved by changing file ownership, running the script with elevated privileges (using `sudo`), or adjusting user IDs if necessary.