Vim's netrw file browser is good enough. With a few tweaks there is no need for plugin like NERDtree. For many tasks you may not even need netrw.
Tutorial on using kill, a UNIX and Linux command for terminating a process. Examples of killing a process, sending a SIGTERM, listing signal names and numbers, and handling 'operation not permitted' errors.
Tutorial on using touch, a UNIX and Linux command for changing file timestamps. Examples of creating an empty file, updating access and modification time, updating just access time, updating just modification time and setting timestamps in the past.