Indicates to the security policy that the user wishes to preserve their existing environment variables. The security policy may return an error if the user does not have permission to preserve the environment.
$ ./install-tl Installing to: /usr/local/texlive/2019 ... Welcome to TeX Live!
See /usr/local/texlive/2019/index.html for links to documentation. The TeX Live web site (https://tug.org/texlive/) contains any updates and corrections. TeX Live is a joint project of the TeX user groups around the world; please consider supporting it by joining the group best for you. The list of groups is available on the web at https://tug.org/usergroups.html.
Add /usr/local/texlive/2019/texmf-dist/doc/man to MANPATH. Add /usr/local/texlive/2019/texmf-dist/doc/info to INFOPATH. Most importantly, add /usr/local/texlive/2019/bin/x86_64-linux to your PATH for current and future sessions. Logfile: /usr/local/texlive/2019/install-tl.log