Which command in Linux can be used to modify user account information?

The command 'usermod' is specifically designed to modify existing user account information in Linux. This includes a range of functionalities such as changing a user's username, group membership, home directory, login shell, and more. When you want to make specific alterations to a user's account, such as updating their group affiliation or renaming their account, 'usermod' provides the necessary options to carry out these changes comprehensively.

In contrast, other commands like 'passwd' are primarily used for changing a user's password, while 'chage' is focused on modifying user password expiry information, such as setting the aging of passwords. 'useradd', on the other hand, is utilized for creating new user accounts rather than modifying existing ones. Thus, 'usermod' is the most appropriate command to use when the task involves altering user account details.