Is sarge stable to install?
Depends on your criteria. For personal workstation use, I find even Sid
to be stable enough for my needs, and that way I get all the newest goodies.
If I were installing a non-critical server, I'd probably go with Stable.
For a critical server, I'd stick with Woody for now.
I want to use 2.6 kernel, either I can upgrade kernel from woody or
re-install completely from Sarge, which one is better?
If you're only wanting to upgrade your kernel, and the 2.6 series is not
in the Woody repositories (implied from your post, but I haven't checked
lately), and you have network access, you can add the Stable lines into
your /etc/apt/sources.list file and then do:
apt-cache search kernel-image-2.6
apt-get install [whatever 2.6 kernel you need/want that's now available]
Once you have a working machine with the new kernel, if you then want to
upgrade the entire system to Stable, follow up with:
No need to do a re-install. I personally would go the other direction.
I'd upgrade my system first (with the dist-upgrade), then upgrade my
kernel. But that's just me.
Thanks and please CC my email address.