What command does someone type in a terminal session in Linux to turn it into a superuser session?

What command does someone type in a terminal session in Linux to turn it into a superuser session?

• sudo -i
• chmod
• wget
• chkdsk 

EXPLANATION

 chmod In Unix-like operating systems, is the command and system call which may change the access permissions to file system objects. It may also alter special mode flags. The request is filtered by the umask. The name is an abbreviation of change mode.

Wget is a computer program that retrieves content from web servers. It is part of the GNU Project. Its name derives from World Wide Web and get. It supports downloading via HTTP, HTTPS, and FTP

CHKDSK is a system tool in DOS, OS/2 and Windows. It verifies the file system integrity of a volume and fixes logical file system errors. It is similar to the fsck command in Unix.

sudo is a program for Unix-like computer operating systems that allows users to run programs with the security privileges of another user, by default the superuser. It originally stood for "superuser do" as the older versions of sudo were designed to run commands only as the superuser.