hard to read – where are broken links?
and not very effective (only first level?)
wget --spider -r --relative --no-directories --no-verbose https://nethence.com/ wget --spider -r --relative --no-directories --no-verbose https://pub.nethence.com/ #--level=99 # Total wall clock time: 54s
find dead links on a specific page — including those pointing to external sites
How to check the first character in a string in Bash or UNIX shell? https://stackoverflow.com/questions/18488270/how-to-check-the-first-character-in-a-string-in-unix
How To Find Broken Links on Your Website Using Wget on Debian 7 https://www.digitalocean.com/community/tutorials/how-to-find-broken-links-on-your-website-using-wget-on-debian-7