Turn: Vim mode error E37:no write since last change (add! To override)

Failure phenomena:

Use Vim to modify the file error, the system prompts the following:

E37:no write since last change (add! To override)

Cause of failure:

The file is a read-only file and cannot be modified.

Workaround:

Use the command: w! to force the disk, in Vim mode, type the following command:

: w!

After saving, use the VIM command to check whether to save, if not saved, edit and repeat the above operation.

or the "Can ' t open file for writing" when saving files in Linux VI

E212:can ' t open file for writing

Press ENTER or type command to continue

There can be two reasons for this error: One is insufficient permissions for the current user, and the second is that the file may be being used by another program or user. The reason for this is the former, the solution is to use the VI command to open the file, preceded by sudo to provide administrator privileges temporarily, that is, using the command "sudo vi grub.cfg" to open the editing file. As a result, the sudo command is useful when we perform some kind of operating system hint, such as "Operation not permitted" and other insufficient rights information, we can often add sudo to the command before the problem of insufficient permissions

Turn: Vim mode error E37:no write since last change (add! To override)