Press Esc to enter Command mode, and then type :wq to write and quit the file. To save a file, you must first be in Command mode. Linux system administration skills assessment.A guide to installing applications on Linux.Download RHEL 9 at no charge through the Red Hat Developer program.

In Vi's Command mode, almost every letter on the keyboard has a function. To return to Command mode, press the Esc key once. In Insert mode, you can enter text, use the Enter key to go to a new line, use the arrow keys to navigate text, and use vi as a free-form text editor. Command mode means you can use keyboard keys to navigate, delete, copy, paste, and do a number of other tasks-except entering text. When you first open a file with Vi, you are in Command mode. The Vi editor has two modes: Command and Insert. At the command line, you type vi to create a new file, or to edit an existing one. Vi is often a symbolic link to Vim (Vi Improved) or an alias to Vim, an enhanced version of Vi. You can use it to edit configuration files, create a grocery list, write a letter home to ask for money, create a new script, or even edit source code.

This advanced, yet simple to use, command-line editing program shows no sign of slowing down.

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