New answers tagged compression
XZ_OPT=-9e tar cJf tarfile.tar.xz directory is even better than XZ_OPT=-9 tar cJf tarfile.tar.xz directory
What I found to be a good solution for me was Ziproxy. It's an http compression proxy that is able to compress big html assets, like images, so that webpages are lighter. As it's a proxy, it works with or without a VPN. It's also very easy to configure.
cpio (the older of the two utilities counting shipping with UNIX) only used to have hard link support for the -p option (i.e. copying from filesystem to filesystem), but the newc output format (not the default one cpio uses) also supports hard links in the output file. (GNU) tar supports hard links without any special options. A comparison can be found ...
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