I guess ls is an alias on Ubuntu - you can check that by executing alias ls in a terminal.
Try unalias ls in a terminal, afterwards you should see no coloring
Update:
To remove only the highlighting, edit your env. var. LS_COLORS e.g. to use the style of Ubuntu 14.04 execute LS_COLORS="$LS_COLORS:di=01;34"
For more details you could have a look at this answer.
Note: To add your alias again, execute alias ls='ls --color=auto' again
I guess
lsis an alias on Ubuntu - you can check that by executingalias lsin a terminal.Try
unalias lsin a terminal, afterwards you should see no coloringUpdate:
To remove only the highlighting, edit your env. var.
LS_COLORSe.g. to use the style of Ubuntu 14.04 executeLS_COLORS="$LS_COLORS:di=01;34"For more details you could have a look at this answer.
Note: To add your alias again, execute
alias ls='ls --color=auto'again