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tex --version returns 2013.

How can I switch to 2015?

I'm using Linux Ubuntu.

In /usr/local/texlive I see 2 directories: "2015" and "texmf-local".

Here's my output of tex --version:

TeX 3.1415926 (TeX Live 2013/Debian)

kpathsea version 6.1.1

I used https://www.tug.org/texlive/ to install.

After running the install script for a long time, it terminated without error. But I'm not sure if I'm using the new version or not.

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    We are going to need more details! What operating system do you use, exactly what did you do to install TeX, what exactly does the version string say (copy-paste)? – Joseph Wright Jul 31 '15 at 7:20
  • Check your PATH. – MaxNoe Jul 31 '15 at 7:21
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    See tex.stackexchange.com/a/95373/59023 for how to install vanilla texlive on ubuntu. – muk.li Jul 31 '15 at 8:09
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    OK, the problem is solved after I manually replace all the sym links of /usr/local/texlive/2015/arch/* --> /usr/bin. Now the version is 2015. – Yan King Yin Jul 31 '15 at 11:33
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    Please, make an answer and accept it yourself, otherwise this question will be in the queue of unanswered questions for ever. – Keks Dose Jul 31 '15 at 12:05
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When different versions of TeXlive are installed on a system, one of them should be used as default and this is depending on your $PATH.

Two solutions:

  • you can remove one of the version (in your case the 2013 one)
  • modify the symbolic link used to point on the 2015 version as you have done by /usr/local/texlive/2015/arch/* pointing to /usr/bin
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Another option is to keep a softlink under /usr/local/texlive that points to the current version. You can always have more than one version and make one version current. current -> /usr/local/texlive/2015

In your .profile/.bashrc make sure to use the current path

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The problem is solved after I manually replace all the sym links of /usr/local/texlive/2015/arch/* --> /usr/bin. Now the version is 2015.

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