How do I run a command on every open buffer?

Explanation

The :bufdo command executes an Ex command on every buffer in the buffer list. This is the buffer-level equivalent of :windo and :argdo.

How it works

• :bufdo command runs command in each buffer
• :bufdo %s/old/new/ge replaces text across all buffers
• :bufdo update saves all modified buffers

Example

Replace var with const in all open files:

:bufdo %s/var/const/ge | update

Tips

• The e flag suppresses errors when pattern is not found
• :bufdo update saves only modified buffers (better than :wall)
• :set hidden is recommended when using :bufdo
• :argdo and :cfdo are alternatives for specific file sets
• :windo runs commands only in visible windows