max xz tarballs... xz

XZ_OPT=-9e tar cJf tarfile.tar.xz directory

from

http://unix.stackexchange.com/questions/28976/how-to-xz-a-directory-with-tar-using-maximum-compression

list all shell variables

( set -o posix ; set ) | less

From :

https://askubuntu.com/questions/275965/how-to-list-all-variables-names-and-their-current-values/356973

Disable rdp printer mapping

HKLM\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services

RegDWORD  fDisableCpm   1

From
https://blogs.technet.microsoft.com/rmilne/2014/06/02/how-to-disable-remote-desktop-printer-mapping/