Nano Command Tips – Shortcut for Server Administrator Debian, CentOS, Ubuntu
^K delete line in nano, nano remove line
^G nano help
^V move up a page – previous page in nano
^_ move to a specific line (^_^V moves to the top of the file, ^_^Y to the bottom)
^C find out what line the cursor is currently on
^W search or find some text in nano
^A move to beginning of line in nano
^E move to end of line in nano
^Y move down a page – next page in nano
^D delete character currently under the cursor
Also for remove or clear or delete some content or multiple lines you can select lines with your mouse and then use CTRL+K.
^O save file in nano (you will be prompted for a file to save to)
^X exit nano (you will be prompted to save your file if you have not)
NOTE: Any command prefixed with a caret symbol (^) means to use the Ctrl key (e.g., ^G means to press the Ctrl+G keys at the same time).