downloaded texlive 15 , at the end, the installer asked to do this:

1. Add / usr / local / texlive / 2015 / TEXMF-DIST / DOC / MAN in manpath .
2. Add / usr / local / texlive / 2015 / TEXMF-DIS / DOC / INFO in infopath .
3. and most importantly, add / usr / local / texlive / 2015 / BIN / i386-Linux
   In your path for current and future sessions.

How to do it?

Answer 1, Authority 100%

Pretty simple way to register something in Path – this is open file .bashrc (or .zshrc , or file for another used Shell) lying in the home directory (~ / .bashrc ), and add at the end:

# add texlive to path
Export Path = $ Path: / USR / Local / TEXLIVE / 2015 / BIN / i386-Linux
Export InfoPath = $ InfoPath: / USR / Local / Texlive / 2015 / TEXMF-DIST / DOC / INFO
EXPORT MANPATH = $ MANPATH: / USR / LOCAL / TEXLIVE / 2015 / TEXMF-DIST / DOC / MAN

In order for actions to take effect, you can either restart the terminal or enter

source ~ / .bashrc

Explanation:

Syntax

export var = $ var: path

Used for add new path to the variable. The symbol: is a way to split paths in Linux. If only it was necessary to create a new variable, and not add the value to the permissible, the syntax would be easier:

export var = value

Answer 2, Authority 44%

How to do it?

Through colon:

export manpath = / usr / local / texlive / 2015 / TEXMF-DIST / DOC / MAN: $ MANPATH
EXPORT INFOPATH = / USR / LOCAL / TEXLIVE / 2015 / TEXMF-DIST / DOC / INFO: $ InfoPath
EXPORT PATH = / USR / LOCAL / TEXLIVE / 2015 / BIN / I386-LINUX: $ Path

In order not to perform these commands manually in each instance of Shell , you can add them to the end of your shell configuration file , which is called ~ /. Cr . You can find out the name Shell or so:

$ echo $ shell
/ bin / bash

So, the file in which you can add commands: ~ / .bashrc .