How do I negate a test with regular expressions in a bash script?
You had it right, just put a space between the ! and the [[ like if ! [[
You can also put the exclamation mark inside the brackets:
if [[ ! $PATH =~ $temp ]]but you should anchor your pattern to reduce false positives:
temp=/mnt/silo/binpattern="(^|:)${temp}(:|$)"if [[ ! "${PATH}" =~ ${pattern} ]]which looks for a match at the beginning or end with a colon before or after it (or both). I recommend using lowercase or mixed case variable names as a habit to reduce the chance of name collisions with shell variables.
the safest way is to put the ! for the regex negation within the [[ ]] like this:
if [[ ! ${STR} =~ YOUR_REGEX ]]; thenotherwise it might fail on certain systems.