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1

On Ubuntu 14.04 LTS, tidy is very old:

$ tidy --version
HTML Tidy for Linux released on 25 March 2009
$

What's the easiest way to get tidy-html5 installed?

Have a somehow overlooked the package for it?

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up vote 6 down vote

You can install the latest html-tidy from source using the instruction given on it's github page.

But the easiest way to install latest version of html-tidy5 would be downloading the latest binary from this page http://binaries.html-tidy.org/

If you're using 64bit Ubuntu, You'd do basically these commands

wget http://binaries.html-tidy.org/binaries/tidy-5.2.0/tidy-5.2.0-64bit.deb
sudo dpkg -i tidy-5.2.0-64bit.deb

It should be installed fine.

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up vote 1 down vote accepted

From source

Follow the instructions at the GitHub page. For the prerequisites, I needed to:

sudo apt-get install -y cmake xsltproc

Package install

Here's what I did to move from the current apt-get install tidy to the latest version.

  1. Find the URL of the latest version to download at: http://binaries.html-tidy.org.

    Try the linux 64-bit DEB first if you're not sure which to pick.

  2. Download it:

    wget <LATEST URL>

  3. Remove unneeded tidy-lib package. tidy-lib is included in the .deb you just downloaded.

    sudo apt-get -y autoremove tidy

  4. Install the .deb you just downloaded: 

    sudo dpkg -i tidy-5.2.0-64bit.deb

  5. Clean up:

    rm tidy-*.deb

Thanks to @Anwar for pointing me in this direction.

Troubleshooting

I needed to do hash -d tidy to get bash to run the new version from /usr/local after I installed from source. You also may need to do this if you chose to keep the previous package of tidy.

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If you install a latest version, older one will be automatically replaced. you don't need to remove it – Anwar Sep 10 '16 at 13:52
    
If I don't remove first I get dpkg: error processing archive tidy-5.2.0-64bit.deb (--install): trying to overwrite '/usr/lib/libtidy.so', which is also in package libtidy-0.99-0 20091223cvs-1.2ubuntu1.1 – Tom Hale Sep 18 '16 at 7:13
    
You accepted my answer, then wrote your own answer saying it didn't work in Linux mint, unaccepted after some days, then again accepted. Again unaccepted. Why? – Anwar Sep 18 '16 at 7:18
    
Sorry - I don't know why it was unaccepted twice. I didn't intentionally unaccept it in the last 2 days if that's what you're asking. Perhaps it was part of the edit process I did just now. I'm accepting this answer over yours because deals with overwrite '/usr/lib/libtidy.so' and shows where to get the latest version. – Tom Hale Sep 18 '16 at 7:28
up vote 0 down vote

  1. On the latest Ubuntus (zesty, 17.04, and artful, 17.10), it is updated to the newest version.

  2. There is a backports ppa for trusty (14.04) and xenial (16.04): ppa:jonathonf/backports

  3. You could also use the nodejs package html-validator-cli as a workaround

    sudo -H npm install -g html-validator-cli
html-validator --filename=path/to/file

    but it needs an internet connection.

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That's 17.04 and 17.10 respectively, which are not LTS versions - for those like me not in the know. – Craig Hicks Aug 14 '17 at 1:24
    
@CraigHicks: thanks for the reminder to add the version numbers – serv-inc Aug 15 '17 at 7:16

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