I'm running a centOS 7 server. I used the instructions from this post to install littleutils - CW Image Optimizer opt-jpg is missing
I received no errors as far as I could tell. The wordpress installation sees that everything installed except for opt-jpg.
I ran this command:
which opt-jpg /usr/bin/which: no opt-jpg in(/usr/local/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/home/user1/.local/bin:/home/user1/bin)
I've tried to install version 1.0.27 and 1.0.37. I've even tried the symlink fix show here :https://github.com/WPPlugins/cw-image-optimizer and here: https://forums.cpanel.net/threads/problem-adding-littleutils.603179/