Setting environment variables in Linux using Bash

Question

In tcsh  I have the following script working      bin tcsh setenv X ROOT  some specified path  setenv XDB      X ROOT  db setenv PATH     X ROOT  bin   PATH   xrun -d xdb1 -i  1  gt   2   What is the equivalent to the tcsh setenv function in Bash    Is there a direct analog  The environment variables are for locating the executable

User · Answer

The reason people often suggest writing

VAR=value
export VAR

instead of the shorter

export VAR=value

is that the longer form works in more different shells than the short form. If you know you're dealing with bash, either works fine, of course.

User · Answer

export VAR value will set VAR to value  Enclose it in single quotes if you want spaces  like export VAR  my val   If you want the variable to be interpolated  use double quotes  like export VAR   MY OTHER VAR

User · Answer

export VAR value will set VAR to value  Enclose it in single quotes if you want spaces  like export VAR  my val   If you want the variable to be interpolated  use double quotes  like export VAR   MY OTHER VAR

User · Answer

export VAR value will set VAR to value  Enclose it in single quotes if you want spaces  like export VAR  my val   If you want the variable to be interpolated  use double quotes  like export VAR   MY OTHER VAR

User · Answer

Set a local and environment variable using Bash on Linux  Check for a local or environment variables for a variable called LOL in Bash   el server  home el   set   grep LOL el server  home el   el server  home el   env   grep LOL el server  home el     Sanity check  no local or environment variable called LOL   Set a local variable called LOL in local  but not environment  So set it   el server  home el   LOL  so wow much code  el server  home el   set   grep LOL LOL  so wow much code  el server  home el   env   grep LOL el server  home el     Variable  LOL  exists in local variables  but not environment variables   LOL will disappear if you restart the terminal  logout login or run exec bash   Set a local variable  and then clear out all local variables in Bash  el server  home el   LOL  so wow much code  el server  home el   set   grep LOL LOL  so wow much code  el server  home el   exec bash el server  home el   set   grep LOL el server  home el     You could also just unset the one variable   el server  home el   LOL  so wow much code  el server  home el   set   grep LOL LOL  so wow much code  el server  home el   unset LOL el server  home el   set   grep LOL el server  home el     Local variable LOL is gone   Promote a local variable to an environment variable   el server  home el   DOGE  such variable  el server  home el   export DOGE el server  home el   set   grep DOGE DOGE  such variable  el server  home el   env   grep DOGE DOGE such variable   Note that exporting makes it show up as both a local variable and an environment variable   Exported variable DOGE above survives a Bash reset   el server  home el   exec bash el server  home el   env   grep DOGE DOGE such variable el server  home el   set   grep DOGE DOGE  such variable    Unset all environment variables   You have to pull out a can of Chuck Norris to reset all environment variables without a logout login   el server  home el   export CAN  chuck norris  el server  home el   env   grep CAN CAN chuck norris el server  home el   set   grep CAN CAN  chuck norris  el server  home el   env -i bash el server  home el   set   grep CAN el server  home el   env   grep CAN   You created an environment variable  and then reset the terminal to get rid of them   Or you could set and unset an environment variable manually like this   el server  home el   export FOO  bar  el server  home el   env   grep FOO FOO bar el server  home el   unset FOO el server  home el   env   grep FOO el server  home el

User · Answer

The reason people often suggest writing

VAR=value
export VAR

instead of the shorter

export VAR=value

is that the longer form works in more different shells than the short form. If you know you're dealing with bash, either works fine, of course.

User · Answer

export VAR value will set VAR to value  Enclose it in single quotes if you want spaces  like export VAR  my val   If you want the variable to be interpolated  use double quotes  like export VAR   MY OTHER VAR

User · Answer

Set a local and environment variable using Bash on Linux  Check for a local or environment variables for a variable called LOL in Bash   el server  home el   set   grep LOL el server  home el   el server  home el   env   grep LOL el server  home el     Sanity check  no local or environment variable called LOL   Set a local variable called LOL in local  but not environment  So set it   el server  home el   LOL  so wow much code  el server  home el   set   grep LOL LOL  so wow much code  el server  home el   env   grep LOL el server  home el     Variable  LOL  exists in local variables  but not environment variables   LOL will disappear if you restart the terminal  logout login or run exec bash   Set a local variable  and then clear out all local variables in Bash  el server  home el   LOL  so wow much code  el server  home el   set   grep LOL LOL  so wow much code  el server  home el   exec bash el server  home el   set   grep LOL el server  home el     You could also just unset the one variable   el server  home el   LOL  so wow much code  el server  home el   set   grep LOL LOL  so wow much code  el server  home el   unset LOL el server  home el   set   grep LOL el server  home el     Local variable LOL is gone   Promote a local variable to an environment variable   el server  home el   DOGE  such variable  el server  home el   export DOGE el server  home el   set   grep DOGE DOGE  such variable  el server  home el   env   grep DOGE DOGE such variable   Note that exporting makes it show up as both a local variable and an environment variable   Exported variable DOGE above survives a Bash reset   el server  home el   exec bash el server  home el   env   grep DOGE DOGE such variable el server  home el   set   grep DOGE DOGE  such variable    Unset all environment variables   You have to pull out a can of Chuck Norris to reset all environment variables without a logout login   el server  home el   export CAN  chuck norris  el server  home el   env   grep CAN CAN chuck norris el server  home el   set   grep CAN CAN  chuck norris  el server  home el   env -i bash el server  home el   set   grep CAN el server  home el   env   grep CAN   You created an environment variable  and then reset the terminal to get rid of them   Or you could set and unset an environment variable manually like this   el server  home el   export FOO  bar  el server  home el   env   grep FOO FOO bar el server  home el   unset FOO el server  home el   env   grep FOO el server  home el

User · Answer

I think you re looking for export - though I could be wrong   I ve never played with tcsh before  Use the following syntax   export VARIABLE value

User · Answer

The reason people often suggest writing

VAR=value
export VAR

instead of the shorter

export VAR=value

is that the longer form works in more different shells than the short form. If you know you're dealing with bash, either works fine, of course.

User · Answer

I think you re looking for export - though I could be wrong   I ve never played with tcsh before  Use the following syntax   export VARIABLE value

User · Answer

I think you re looking for export - though I could be wrong   I ve never played with tcsh before  Use the following syntax   export VARIABLE value

User · Answer

VAR value sets VAR to value   After that export VAR will give it to child processes too   export VAR value is a shorthand doing both

User · Answer

VAR value sets VAR to value   After that export VAR will give it to child processes too   export VAR value is a shorthand doing both

User · Answer

VAR value sets VAR to value   After that export VAR will give it to child processes too   export VAR value is a shorthand doing both

User · Answer

The reason people often suggest writing

VAR=value
export VAR

instead of the shorter

export VAR=value

is that the longer form works in more different shells than the short form. If you know you're dealing with bash, either works fine, of course.

User · Answer

I think you re looking for export - though I could be wrong   I ve never played with tcsh before  Use the following syntax   export VARIABLE value

User · Answer

VAR value sets VAR to value   After that export VAR will give it to child processes too   export VAR value is a shorthand doing both

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