I. Introduction
Input command under Linux man ps See:
Add horizontal line is standard syntax - such ps -elf
without horizontal line is BSD syntax - such AUX PS
the To Every See the using Standard System Process The syntax ON:
PS -e
PS -ef
PS -ef
PS -ely
the To See Every System Process The ON the using the BSD syntax:
PS AX
PS the AXU
Second, the difference
ps aux: The most commonly used combination of BSD-style options, wherein a represents all the processes associated with the terminal, if x represents the use of all processes; U represents a user listed in the process.
ps -elf: unix standard combination of styles, which lists all processes on behalf of -e, -l long format behalf, -f represent the full format
Reference Links: https://www.jianshu.com/p/b75ff608b9cd