How to keep environment variables when using sudo

Question

When I use any command with sudo the environment variables are not there  For example after setting HTTP PROXY the command wget works fine without sudo  However if I type sudo wget it says it can t bypass the proxy setting

User · Answer

For individual variables you want to make available on a one off basis you can make it part of the command   sudo http proxy  http proxy wget  http   stackoverflow com

User · Answer

A simple wrapper function  or in-line for loop   I came up with a unique solution because    sudo -E      was leaking variables that was causing problems for my command sudo VAR1   VAR1      VAR42   VAR42       was long and ugly in my case   demo sh     bin bash  function sudo exports        eval sudo   for x in   EXPORTS  do printf   q  q     x      x    done             create a test script to call as sudo echo  echo Forty-Two is  VAR42   gt  sudo test sh chmod  x sudo test sh  export VAR42  The Answer to the Ultimate Question of Life  The Universe  and Everything    export  EXPORTS   EXPORTS VAR1 VAR2 VAR3 VAR4 VAR5 VAR6 VAR7 VAR8 VAR9 VAR10 VAR11 VAR12 VAR13 VAR14 VAR15 VAR16 VAR17 VAR18 VAR19 VAR20 VAR21 VAR22 VAR23 VAR24 VAR25 VAR26 VAR27 VAR28 VAR29 VAR30 VAR31 VAR32 VAR33 VAR34 VAR35 VAR36 VAR37 VAR38 VAR39 VAR40 VAR41 VAR42     clean function style sudo exports   sudo test sh    or just use the content of the function eval sudo   for x in   EXPORTS  do printf   q  q     x      x    done     sudo test sh   Result      demo sh Forty-Two is The Answer to the Ultimate Question of Life  The Universe  and Everything  Forty-Two is The Answer to the Ultimate Question of Life  The Universe  and Everything    How   This is made possible by a feature of the bash builtin printf  The  q produces a shell quoted string  Unlike the parameter expansion in bash 4 4  this works in bash versions  lt  4 0

User · Answer

You can also combine the two env keep statements in Ahmed Aswani s answer into a single statement like this   Defaults env keep     http proxy https proxy   You should also consider specifying env keep for only a single command like this   Defaults  bin  your command  env keep     http proxy https proxy

User · Answer

First you need to export HTTP PROXY  Second  you need to read man sudo carefully  and pay attention to the -E flag  This works     export HTTP PROXY foof   sudo -E bash -c  echo  HTTP PROXY    Here is the quote from the man page   -E  --preserve-env              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

User · Answer

The trick is to add environment variables to sudoers file via sudo visudo command and add these lines   Defaults env keep     ftp proxy http proxy https proxy no proxy    taken from ArchLinux wiki   For Ubuntu 14  you need to specify in separate lines as it returns the errors for multi-variable lines     Defaults  env keep     http proxy  Defaults  env keep     https proxy  Defaults  env keep     HTTP PROXY  Defaults  env keep     HTTPS PROXY

User · Answer

If you have the need to keep the environment variables in a script you can put your command in a here document like this  Especially if you have lots of variables to set things look tidy this way     prepare a script e g  for running maven runmaven  tmp runmaven     create the script with a here document  cat  lt  lt  EOF  gt   runmaven    bin bash   run the maven clean with environment variables set export ANT HOME  usr share ant export MAKEFLAGS -j4 mvn clean install EOF   make the script executable chmod  x  runmaven   run it sudo  runmaven   remove it or comment out to keep rm  runmaven

[linux] How to keep environment variables when using sudo

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