I can see few typos like no spaces in `ls-R`, `lp-d`, etc. Commands like `VARIABLE_NAME= variable_value` shouldn't have space. `-= no permission` should be just

I can see few typos like no spaces in `ls-R`, `lp-d`, etc. Commands like `VARIABLE_NAME= variable_value` shouldn't have space. `-= no permission` should be just `-`. `D Delete contents of line after the cursor` should be including the character under the cursor. Some commands are linked to http://unixhelp.ed.ac.uk/CGI/man-cgi?grep http://unixhelp.ed.ac.uk/CGI/man-cgi?grep In short, this is a poor article.