Where did bash environment variable get initialized from?

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1
down vote

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When I execute:



echo $PYTHONPATH


on command line I get the following output:



/home/nehal/catkin_ws/devel/lib/python2.7/dist-packages:/opt/ros/kinetic/lib/python2.7/dist-packages:/home/nehal/anaconda3/lib/python3.6/site-package‌​s:/home/nehal/anaconda3/lib/python3.6/dist-package‌​s:/home/nehal/anaconda3/lib/python3.6/dist-package‌​s:/home/nehal/anaconda3/lib/python3.6/dist-package‌​s:/home/nehal/anaconda3/lib/python3.5/dist-package‌​s:/home/userx/anaconda3/lib/python3.5/dist-package‌​s:/home/userx/anaconda3/lib/python3.5/dist-package‌​s:/home/userx/anaconda3/lib/python3.5/dist-package‌​s


I looked into .bashrc file and found only one PYTHONPATH set



export PYTHONPATH="/home/nehal/anaconda3/lib/python3.6/site-package‌​s:$PYTHONPATH"


I also looked into .profile, /etc/environment and /etc/profile
but nowhere could I find PYTHONPATH.



My question is where did the above extra paths come from?







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  • 1




    There is a FILES section man bash, check it for list of files, but please note that it could change from distro to distro
    – user996142
    May 8 at 18:12






  • 1




    See those dist-packages, and site-packages directories? Those are probably from when you installed ros and anaconda3. Check and see what other files you are sourcing in your .bashrc
    – Lucas Ramage
    May 8 at 19:51











  • @nrb Is there a .bash_profile?
    – Nasir Riley
    May 8 at 23:11










  • @NasirRiley No, Why?
    – nrb
    May 8 at 23:26










  • @nrb Because depending on the environment, that file usually exists to initialize bash sessions as does .bashrc.
    – Nasir Riley
    May 8 at 23:30














up vote
1
down vote

favorite












When I execute:



echo $PYTHONPATH


on command line I get the following output:



/home/nehal/catkin_ws/devel/lib/python2.7/dist-packages:/opt/ros/kinetic/lib/python2.7/dist-packages:/home/nehal/anaconda3/lib/python3.6/site-package‌​s:/home/nehal/anaconda3/lib/python3.6/dist-package‌​s:/home/nehal/anaconda3/lib/python3.6/dist-package‌​s:/home/nehal/anaconda3/lib/python3.6/dist-package‌​s:/home/nehal/anaconda3/lib/python3.5/dist-package‌​s:/home/userx/anaconda3/lib/python3.5/dist-package‌​s:/home/userx/anaconda3/lib/python3.5/dist-package‌​s:/home/userx/anaconda3/lib/python3.5/dist-package‌​s


I looked into .bashrc file and found only one PYTHONPATH set



export PYTHONPATH="/home/nehal/anaconda3/lib/python3.6/site-package‌​s:$PYTHONPATH"


I also looked into .profile, /etc/environment and /etc/profile
but nowhere could I find PYTHONPATH.



My question is where did the above extra paths come from?







share|improve this question

















  • 1




    There is a FILES section man bash, check it for list of files, but please note that it could change from distro to distro
    – user996142
    May 8 at 18:12






  • 1




    See those dist-packages, and site-packages directories? Those are probably from when you installed ros and anaconda3. Check and see what other files you are sourcing in your .bashrc
    – Lucas Ramage
    May 8 at 19:51











  • @nrb Is there a .bash_profile?
    – Nasir Riley
    May 8 at 23:11










  • @NasirRiley No, Why?
    – nrb
    May 8 at 23:26










  • @nrb Because depending on the environment, that file usually exists to initialize bash sessions as does .bashrc.
    – Nasir Riley
    May 8 at 23:30












up vote
1
down vote

favorite









up vote
1
down vote

favorite











When I execute:



echo $PYTHONPATH


on command line I get the following output:



/home/nehal/catkin_ws/devel/lib/python2.7/dist-packages:/opt/ros/kinetic/lib/python2.7/dist-packages:/home/nehal/anaconda3/lib/python3.6/site-package‌​s:/home/nehal/anaconda3/lib/python3.6/dist-package‌​s:/home/nehal/anaconda3/lib/python3.6/dist-package‌​s:/home/nehal/anaconda3/lib/python3.6/dist-package‌​s:/home/nehal/anaconda3/lib/python3.5/dist-package‌​s:/home/userx/anaconda3/lib/python3.5/dist-package‌​s:/home/userx/anaconda3/lib/python3.5/dist-package‌​s:/home/userx/anaconda3/lib/python3.5/dist-package‌​s


I looked into .bashrc file and found only one PYTHONPATH set



export PYTHONPATH="/home/nehal/anaconda3/lib/python3.6/site-package‌​s:$PYTHONPATH"


I also looked into .profile, /etc/environment and /etc/profile
but nowhere could I find PYTHONPATH.



My question is where did the above extra paths come from?







share|improve this question













When I execute:



echo $PYTHONPATH


on command line I get the following output:



/home/nehal/catkin_ws/devel/lib/python2.7/dist-packages:/opt/ros/kinetic/lib/python2.7/dist-packages:/home/nehal/anaconda3/lib/python3.6/site-package‌​s:/home/nehal/anaconda3/lib/python3.6/dist-package‌​s:/home/nehal/anaconda3/lib/python3.6/dist-package‌​s:/home/nehal/anaconda3/lib/python3.6/dist-package‌​s:/home/nehal/anaconda3/lib/python3.5/dist-package‌​s:/home/userx/anaconda3/lib/python3.5/dist-package‌​s:/home/userx/anaconda3/lib/python3.5/dist-package‌​s:/home/userx/anaconda3/lib/python3.5/dist-package‌​s


I looked into .bashrc file and found only one PYTHONPATH set



export PYTHONPATH="/home/nehal/anaconda3/lib/python3.6/site-package‌​s:$PYTHONPATH"


I also looked into .profile, /etc/environment and /etc/profile
but nowhere could I find PYTHONPATH.



My question is where did the above extra paths come from?









share|improve this question












share|improve this question




share|improve this question








edited May 8 at 21:01









Alex Tullenhoff

783




783









asked May 8 at 18:08









nrb

63




63







  • 1




    There is a FILES section man bash, check it for list of files, but please note that it could change from distro to distro
    – user996142
    May 8 at 18:12






  • 1




    See those dist-packages, and site-packages directories? Those are probably from when you installed ros and anaconda3. Check and see what other files you are sourcing in your .bashrc
    – Lucas Ramage
    May 8 at 19:51











  • @nrb Is there a .bash_profile?
    – Nasir Riley
    May 8 at 23:11










  • @NasirRiley No, Why?
    – nrb
    May 8 at 23:26










  • @nrb Because depending on the environment, that file usually exists to initialize bash sessions as does .bashrc.
    – Nasir Riley
    May 8 at 23:30












  • 1




    There is a FILES section man bash, check it for list of files, but please note that it could change from distro to distro
    – user996142
    May 8 at 18:12






  • 1




    See those dist-packages, and site-packages directories? Those are probably from when you installed ros and anaconda3. Check and see what other files you are sourcing in your .bashrc
    – Lucas Ramage
    May 8 at 19:51











  • @nrb Is there a .bash_profile?
    – Nasir Riley
    May 8 at 23:11










  • @NasirRiley No, Why?
    – nrb
    May 8 at 23:26










  • @nrb Because depending on the environment, that file usually exists to initialize bash sessions as does .bashrc.
    – Nasir Riley
    May 8 at 23:30







1




1




There is a FILES section man bash, check it for list of files, but please note that it could change from distro to distro
– user996142
May 8 at 18:12




There is a FILES section man bash, check it for list of files, but please note that it could change from distro to distro
– user996142
May 8 at 18:12




1




1




See those dist-packages, and site-packages directories? Those are probably from when you installed ros and anaconda3. Check and see what other files you are sourcing in your .bashrc
– Lucas Ramage
May 8 at 19:51





See those dist-packages, and site-packages directories? Those are probably from when you installed ros and anaconda3. Check and see what other files you are sourcing in your .bashrc
– Lucas Ramage
May 8 at 19:51













@nrb Is there a .bash_profile?
– Nasir Riley
May 8 at 23:11




@nrb Is there a .bash_profile?
– Nasir Riley
May 8 at 23:11












@NasirRiley No, Why?
– nrb
May 8 at 23:26




@NasirRiley No, Why?
– nrb
May 8 at 23:26












@nrb Because depending on the environment, that file usually exists to initialize bash sessions as does .bashrc.
– Nasir Riley
May 8 at 23:30




@nrb Because depending on the environment, that file usually exists to initialize bash sessions as does .bashrc.
– Nasir Riley
May 8 at 23:30










2 Answers
2






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up vote
3
down vote













You can figure out which files are being sourced by tracing which files bash opens:



strace -e open bash -l


This should print out all the files bash tries to open (many of which are C libraries you can ingore). That should give you hints about where to look. (The "-l" option to bash asks it to run as a "login" shell, which generally causes bash to parse a few more startup files.)






share|improve this answer




























    up vote
    0
    down vote













    On startup 'bash' loads it's settings from many files. Most of them usually live in subdirectories of '/etc' directory. So I would run the following command to find all files containing 'PYTHONPATH':



    grep -R PYTHONPATH /etc 2>/dev/null






    share|improve this answer





















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      2 Answers
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      up vote
      3
      down vote













      You can figure out which files are being sourced by tracing which files bash opens:



      strace -e open bash -l


      This should print out all the files bash tries to open (many of which are C libraries you can ingore). That should give you hints about where to look. (The "-l" option to bash asks it to run as a "login" shell, which generally causes bash to parse a few more startup files.)






      share|improve this answer

























        up vote
        3
        down vote













        You can figure out which files are being sourced by tracing which files bash opens:



        strace -e open bash -l


        This should print out all the files bash tries to open (many of which are C libraries you can ingore). That should give you hints about where to look. (The "-l" option to bash asks it to run as a "login" shell, which generally causes bash to parse a few more startup files.)






        share|improve this answer























          up vote
          3
          down vote










          up vote
          3
          down vote









          You can figure out which files are being sourced by tracing which files bash opens:



          strace -e open bash -l


          This should print out all the files bash tries to open (many of which are C libraries you can ingore). That should give you hints about where to look. (The "-l" option to bash asks it to run as a "login" shell, which generally causes bash to parse a few more startup files.)






          share|improve this answer













          You can figure out which files are being sourced by tracing which files bash opens:



          strace -e open bash -l


          This should print out all the files bash tries to open (many of which are C libraries you can ingore). That should give you hints about where to look. (The "-l" option to bash asks it to run as a "login" shell, which generally causes bash to parse a few more startup files.)







          share|improve this answer













          share|improve this answer



          share|improve this answer











          answered May 8 at 19:58









          Alex Tullenhoff

          783




          783






















              up vote
              0
              down vote













              On startup 'bash' loads it's settings from many files. Most of them usually live in subdirectories of '/etc' directory. So I would run the following command to find all files containing 'PYTHONPATH':



              grep -R PYTHONPATH /etc 2>/dev/null






              share|improve this answer

























                up vote
                0
                down vote













                On startup 'bash' loads it's settings from many files. Most of them usually live in subdirectories of '/etc' directory. So I would run the following command to find all files containing 'PYTHONPATH':



                grep -R PYTHONPATH /etc 2>/dev/null






                share|improve this answer























                  up vote
                  0
                  down vote










                  up vote
                  0
                  down vote









                  On startup 'bash' loads it's settings from many files. Most of them usually live in subdirectories of '/etc' directory. So I would run the following command to find all files containing 'PYTHONPATH':



                  grep -R PYTHONPATH /etc 2>/dev/null






                  share|improve this answer













                  On startup 'bash' loads it's settings from many files. Most of them usually live in subdirectories of '/etc' directory. So I would run the following command to find all files containing 'PYTHONPATH':



                  grep -R PYTHONPATH /etc 2>/dev/null







                  share|improve this answer













                  share|improve this answer



                  share|improve this answer











                  answered May 8 at 21:25









                  John Doe

                  804




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