28

Internet connection is working.

apt-get is working.

Trying to add ppa:cooperjona/lightread but an error has raised:

Cannot add PPA 'ppa:cooperjona/lightread' . Please check that the PPA name or format is correct.

I supposed there is an error in writing or in the PPA.

I tried also the 'ppa:tombeckmann/ppa' but with same error.

Maythux
  • 87,123

3 Answers3

42

Open Terminal and run the command:

sudo apt-get install --reinstall ca-certificates

It may work, but if doesn't then run:

sudo -E add-apt-repository ppa:ppaname/ppa

Instead of:

sudo add-apt-repository ppa:ppaname/ppa

boo lean - Go FAT
  • 15
Pushpander Kumar Singh
  • 421
16

I googled the error and find this. So i tried to clone a git as he did there and has the same result.

So to solve this:

sudo apt-get install --reinstall ca-certificates

and things become smooth again :)

Maythux
  • 87,123
5

I had this exact error message about checking the PPA name or format. My network was connected and I could ping websites and browse fine.

What I finally figured out was the clock on my computer was set wrong. If it's off more than a small amount, the secure connection will fail and it will report this message. It's very unhelpful.

Check your clock. I set mine and then it immediately worked as expected.

dslake
  • 151