I noticed that the current Tumbleweed is not easily able to install pdftk. First, I was not able to find it in the yast list. Then, proceeding via command line, I ran into a missing dependency:
kadlecf@localhost:~> sudo zypper install pdftk
[sudo] password for root:
Loading repository data…
Reading installed packages…
Resolving package dependencies…
Problem: nothing provides libgcj.so.17()(64bit) needed by pdftk-2.02-50.3.x86_64
Solution 1: do not install pdftk-2.02-50.3.x86_64
Solution 2: break pdftk-2.02-50.3.x86_64 by ignoring some of its dependencies
Choose from above solutions by number or cancel [1/2/c] (c): 1
Resolving dependencies…
Resolving package dependencies…
Nothing to do.
At this point, it is not obvious how to install the required library. The solution exists, though. I have spent some time by looking for the appropriate package, and I was able to install pdftk at last via:
zypper addrepo http://packman.inode.at/suse/openSUSE_Tumbleweed/ packman
zypper install libgcj-gcc6
zypper install pdftk
I guess it would be useful to add these dependencies so the user does not have to repeat my search.
F.