Best free and secure proxy for linux?

hello , i need to proxy , please tel me that what is best free proxy for linux ?

Hello , and thanks for replay .
my connection is very slow to access , i need a free proxy(tunnel) hole my linux to access normally speed .

I’ve been using TorGuard for a while already and I like how it works.

Is TorGuard good for slow connections?

I did some research on it and TorGuard is really good, but it looks like I won’t be needing it. The only reason I needed proxy was to be able to access TPB. It was down in my country and I managed to find a better solution. You can just go online and find their proxy list. When it is down, it is not down everywhere, it just means that your country is censoring it, but there is a way to avoid censorship. You can just access their website with a different proxy and you will be good to go, that was a pretty easy solution for that problem.