What is the slogan fg?

This word is one of the commonly used commands under Linux.

Linux, the full name of GNULinux, is a UNIX-like operating system that is free to use and spread freely. Its kernel was first released by Linus Benedict Torvalds on October 5, 1991.

It can run major Unix software tools, applications and network protocols. It supports 32-bit and 64-bit hardware. Linux inherits the network-centric design philosophy of Unix and is a multi-user network operating system with stable performance.