In example 1.8, there should be a colon before the group specification rather than a period in the lines
Usage: chown [OPTION]... OWNER[:[GROUP]] FILE... or: chown [OPTION]... :[GROUP] FILE...
The third example in the left column should simply read:
if (( numeric expression )) then block of statements fi
In example 2.7, the backticks around "hot dogs"
in the lines numbered 8 and 15 should be apostrophes.
In example 2.7, the line starting ${foods[$n] should have a closing
brace } after the closing square bracket and should read
${foods[$n]} and anything else you would like to eat?The flag --revert-match should be
invert-match