Hi everybody...

I downloaded 'contex-setup-linux-64.zip minimals' and I have not had any problem to install it; but, when I try to make 'ctxtools --update', it generates.:
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/opt/context/tex/texmf-linux-64/bin/texmfstart:1755: warning: Insegure world writable dir /tmp/ in PATH, mode 041777
/op/context/tex/texmf-context/scripts/context/ruby/base/system.rb:16:warning: Insegure world writable dir /tmp/ in PATH, mode 041777
CtxTools | updating /opt/context/tex/texmf-context:/opt/context/tex/texmf
CtxTools | unable to change to /opt/context/tex/texmf-context/:/opt/context/tex/texmf

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I am owner of '/opt/context' and '/tmp dir' are into '/opt/context/tmp' with '1777 permissions'. The configuration files are.:
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TEXMFCACHE=/opt/contex/tmp
TEXMFTEMP=$TEXMFCACHE
TEXMF_HOME=/opt/context/tex
TEXMF_BIN=${TEXMF_HOME}/texmf-linux-64/bin

PATH=$TEXMFCACHE:$TEXMFTEMP:$TEXMF_HOME:$TEXMF_BIN:$PATH

export TEXMFCACHE TEXMFTEMP TEXMF_HOME TEXMF_BIN PATH
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The 'luatex', 'xetex', ... are correct; i.e.:
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luatex --version | head -1
This is LuaTeX, Version snapshot-0.20.2-2007121718

xetex --version | head -1
XeTeX 3.141592-2.2-0.997 (Web2C 7.5.6)
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How do I update 'contex', 'luatex', ...? Or do I download a minimum version whenever I want to update, again and again?

Huge work guys and thanks for possible help