segmentation fault with ps

UNIX for Advanced & Expert Users
1

What does this mean and why is this happening?

[bob@hi ~]$ ps -ef | grep ocular
Segmentation fault (core dumped)
[bob@hi ~]$ ps -ef | grep ocular
Segmentation fault (core dumped)
[bob@hi ~]$ ps aux | grep ocular
Segmentation fault (core dumped)
[bob@hi ~]$ ps
Segmentation fault (core dumped)
[bob@hi ~]$ pkill okular
[bob@hi ~]$ ps
Segmentation fault (core dumped)
[bob@hi ~]$
2

It means you've either got corrupted files or bad RAM.