How to set variables in Fish shell?
The set command in my fish shell in Ubuntu (elementary OS and Linux Mint) doesn't work. The variables stay empty and even the examples in the tutorials don't work, i.e.:
(set foo hi --> # Sets the value of the variable $foo to be 'hi'.).
In the script I am trying to do the following,
set COUNTRY US CN MX
but when I want to call the variable by $COUNTRY there is no answer.
What am I doing wrong?
linux ubuntu-16.04 fish
edited Nov 14 '18 at 23:35
jww
53.1k39226499
asked Nov 14 '18 at 3:17
user10649607user10649607
1
add a comment |
The set command in my fish shell in Ubuntu (elementary OS and Linux Mint) doesn't work. The variables stay empty and even the examples in the tutorials don't work, i.e.:
(set foo hi --> # Sets the value of the variable $foo to be 'hi'.).
In the script I am trying to do the following,
set COUNTRY US CN MX
but when I want to call the variable by $COUNTRY there is no answer.
What am I doing wrong?
linux ubuntu-16.04 fish
edited Nov 14 '18 at 23:35
jww
53.1k39226499
asked Nov 14 '18 at 3:17
user10649607user10649607
1
1
Are you sure you are running fish? E.g.dashandbashwill acceptset COUNTRY US CN MXwithout an error, but will do something entirely different. If this is a script, please check that you haven't added a#!/bin/shshebang out of habit!
– faho
Nov 14 '18 at 8:45
In general, more context would be quite helpful here!
– faho
Nov 14 '18 at 8:46
Please read stackoverflow.com/help/how-to-ask
– glenn jackman
Nov 14 '18 at 15:07
add a comment |
The set command in my fish shell in Ubuntu (elementary OS and Linux Mint) doesn't work. The variables stay empty and even the examples in the tutorials don't work, i.e.:
(set foo hi --> # Sets the value of the variable $foo to be 'hi'.).
In the script I am trying to do the following,
set COUNTRY US CN MX
but when I want to call the variable by $COUNTRY there is no answer.
What am I doing wrong?
linux ubuntu-16.04 fish
edited Nov 14 '18 at 23:35
jww
53.1k39226499
asked Nov 14 '18 at 3:17
user10649607user10649607
1
The set command in my fish shell in Ubuntu (elementary OS and Linux Mint) doesn't work. The variables stay empty and even the examples in the tutorials don't work, i.e.:
(set foo hi --> # Sets the value of the variable $foo to be 'hi'.).
In the script I am trying to do the following,
set COUNTRY US CN MX
but when I want to call the variable by $COUNTRY there is no answer.
What am I doing wrong?
linux ubuntu-16.04 fish
linux ubuntu-16.04 fish
edited Nov 14 '18 at 23:35
jww
53.1k39226499
asked Nov 14 '18 at 3:17
user10649607user10649607
1
edited Nov 14 '18 at 23:35
jww
53.1k39226499
asked Nov 14 '18 at 3:17
user10649607user10649607
1
edited Nov 14 '18 at 23:35
jww
53.1k39226499
edited Nov 14 '18 at 23:35
jww
53.1k39226499
edited Nov 14 '18 at 23:35
jww
53.1k39226499
53.1k39226499
asked Nov 14 '18 at 3:17
user10649607user10649607
1
asked Nov 14 '18 at 3:17
user10649607user10649607
1
asked Nov 14 '18 at 3:17
user10649607user10649607
1
1
1
Are you sure you are running fish? E.g.dashandbashwill acceptset COUNTRY US CN MXwithout an error, but will do something entirely different. If this is a script, please check that you haven't added a#!/bin/shshebang out of habit!
– faho
Nov 14 '18 at 8:45
In general, more context would be quite helpful here!
– faho
Nov 14 '18 at 8:46
Please read stackoverflow.com/help/how-to-ask
– glenn jackman
Nov 14 '18 at 15:07
add a comment |
1
Are you sure you are running fish? E.g.dashandbashwill acceptset COUNTRY US CN MXwithout an error, but will do something entirely different. If this is a script, please check that you haven't added a#!/bin/shshebang out of habit!
– faho
Nov 14 '18 at 8:45
In general, more context would be quite helpful here!
– faho
Nov 14 '18 at 8:46
Please read stackoverflow.com/help/how-to-ask
– glenn jackman
Nov 14 '18 at 15:07
1
1
Are you sure you are running fish? E.g.
dash and bash will accept set COUNTRY US CN MX without an error, but will do something entirely different. If this is a script, please check that you haven't added a #!/bin/sh shebang out of habit!– faho
Nov 14 '18 at 8:45
Are you sure you are running fish? E.g.
dash and bash will accept set COUNTRY US CN MX without an error, but will do something entirely different. If this is a script, please check that you haven't added a #!/bin/sh shebang out of habit!– faho
Nov 14 '18 at 8:45
In general, more context would be quite helpful here!
– faho
Nov 14 '18 at 8:46
In general, more context would be quite helpful here!
– faho
Nov 14 '18 at 8:46
Please read stackoverflow.com/help/how-to-ask
– glenn jackman
Nov 14 '18 at 15:07
Please read stackoverflow.com/help/how-to-ask
– glenn jackman
Nov 14 '18 at 15:07
add a comment |
1 Answer
1
active
oldest
votes
Are you really using the fish shell? Because your example works for me:
$ set COUNTRY US CN MX
$ echo $COUNTRY
US CN MX
$ set --show COUNTRY
$COUNTRY: not set in local scope
$COUNTRY: set in global scope, unexported, with 3 elements
$COUNTRY[1]: length=2 value=|US|
$COUNTRY[2]: length=2 value=|CN|
$COUNTRY[3]: length=2 value=|MX|
$COUNTRY: not set in universal scope
I suspect you are trying to use COUNTRY in another process. In which case you need to export the var using set -x COUNTRY US CN MX. But note that fish vars are arrays and exporting a var with more than one value won't be intelligible to a child process (unless that child process is a fish shell).
Also, it sounds like you might be trying to modify a variable in a parent process via a fish script. That won't work. You cannot modify the variables of a parent process. Not even if they are an environment variable. This is not a fish limitation. It is inherent in the design of the UNIX process model.
answered Nov 14 '18 at 5:07
Kurtis RaderKurtis Rader
3,104610
add a comment |
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1 Answer
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Are you really using the fish shell? Because your example works for me:
$ set COUNTRY US CN MX
$ echo $COUNTRY
US CN MX
$ set --show COUNTRY
$COUNTRY: not set in local scope
$COUNTRY: set in global scope, unexported, with 3 elements
$COUNTRY[1]: length=2 value=|US|
$COUNTRY[2]: length=2 value=|CN|
$COUNTRY[3]: length=2 value=|MX|
$COUNTRY: not set in universal scope
I suspect you are trying to use COUNTRY in another process. In which case you need to export the var using set -x COUNTRY US CN MX. But note that fish vars are arrays and exporting a var with more than one value won't be intelligible to a child process (unless that child process is a fish shell).
Also, it sounds like you might be trying to modify a variable in a parent process via a fish script. That won't work. You cannot modify the variables of a parent process. Not even if they are an environment variable. This is not a fish limitation. It is inherent in the design of the UNIX process model.
answered Nov 14 '18 at 5:07
Kurtis RaderKurtis Rader
3,104610
add a comment |
Are you really using the fish shell? Because your example works for me:
$ set COUNTRY US CN MX
$ echo $COUNTRY
US CN MX
$ set --show COUNTRY
$COUNTRY: not set in local scope
$COUNTRY: set in global scope, unexported, with 3 elements
$COUNTRY[1]: length=2 value=|US|
$COUNTRY[2]: length=2 value=|CN|
$COUNTRY[3]: length=2 value=|MX|
$COUNTRY: not set in universal scope
I suspect you are trying to use COUNTRY in another process. In which case you need to export the var using set -x COUNTRY US CN MX. But note that fish vars are arrays and exporting a var with more than one value won't be intelligible to a child process (unless that child process is a fish shell).
Also, it sounds like you might be trying to modify a variable in a parent process via a fish script. That won't work. You cannot modify the variables of a parent process. Not even if they are an environment variable. This is not a fish limitation. It is inherent in the design of the UNIX process model.
answered Nov 14 '18 at 5:07
Kurtis RaderKurtis Rader
3,104610
add a comment |
Are you really using the fish shell? Because your example works for me:
$ set COUNTRY US CN MX
$ echo $COUNTRY
US CN MX
$ set --show COUNTRY
$COUNTRY: not set in local scope
$COUNTRY: set in global scope, unexported, with 3 elements
$COUNTRY[1]: length=2 value=|US|
$COUNTRY[2]: length=2 value=|CN|
$COUNTRY[3]: length=2 value=|MX|
$COUNTRY: not set in universal scope
I suspect you are trying to use COUNTRY in another process. In which case you need to export the var using set -x COUNTRY US CN MX. But note that fish vars are arrays and exporting a var with more than one value won't be intelligible to a child process (unless that child process is a fish shell).
Also, it sounds like you might be trying to modify a variable in a parent process via a fish script. That won't work. You cannot modify the variables of a parent process. Not even if they are an environment variable. This is not a fish limitation. It is inherent in the design of the UNIX process model.
answered Nov 14 '18 at 5:07
Kurtis RaderKurtis Rader
3,104610
Are you really using the fish shell? Because your example works for me:
$ set COUNTRY US CN MX
$ echo $COUNTRY
US CN MX
$ set --show COUNTRY
$COUNTRY: not set in local scope
$COUNTRY: set in global scope, unexported, with 3 elements
$COUNTRY[1]: length=2 value=|US|
$COUNTRY[2]: length=2 value=|CN|
$COUNTRY[3]: length=2 value=|MX|
$COUNTRY: not set in universal scope
I suspect you are trying to use COUNTRY in another process. In which case you need to export the var using set -x COUNTRY US CN MX. But note that fish vars are arrays and exporting a var with more than one value won't be intelligible to a child process (unless that child process is a fish shell).
Also, it sounds like you might be trying to modify a variable in a parent process via a fish script. That won't work. You cannot modify the variables of a parent process. Not even if they are an environment variable. This is not a fish limitation. It is inherent in the design of the UNIX process model.
answered Nov 14 '18 at 5:07
Kurtis RaderKurtis Rader
3,104610
answered Nov 14 '18 at 5:07
Kurtis RaderKurtis Rader
3,104610
answered Nov 14 '18 at 5:07
Kurtis RaderKurtis Rader
3,104610
answered Nov 14 '18 at 5:07
Kurtis RaderKurtis Rader
3,104610
3,104610
add a comment |
add a comment |
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1
Are you sure you are running fish? E.g.
dashandbashwill acceptset COUNTRY US CN MXwithout an error, but will do something entirely different. If this is a script, please check that you haven't added a#!/bin/shshebang out of habit!– faho
Nov 14 '18 at 8:45
In general, more context would be quite helpful here!
– faho
Nov 14 '18 at 8:46
Please read stackoverflow.com/help/how-to-ask
– glenn jackman
Nov 14 '18 at 15:07