how to change filename in linux terminal code example

Example 1: linux change file name

mv oldfile.txt newfile.txt

Example 2: how to rename a file in linux

To use mv to rename a file type mv , a space, the name of the file, a space, and the new name you wish the file to have.
Then press Enter. You can use ls to check the file has been renamed
eg. mv demo.py demo1.py

Example 3: rename set of files terminal linux

$ mmv a\* b\#1