Compare two variables with a Shell script

up vote
1
down vote

favorite

I am new to shell programming, please forgive any blunder. I've been unable to find an answer to this:

I have a script that allows me to compare these variables:

FT_NBR1='?""'
FT_NBR2=rcrdmddd

My question is how can I pass the FT_NBRs variables to the script to execute the comparison in the terminal?

Thanks!

edited Jun 11 at 9:36

asked Jun 6 at 11:52

Wizzardzz

add a commentÂ |Â

up vote
1
down vote

favorite

I am new to shell programming, please forgive any blunder. I've been unable to find an answer to this:

I have a script that allows me to compare these variables:

FT_NBR1='?""'
FT_NBR2=rcrdmddd

My question is how can I pass the FT_NBRs variables to the script to execute the comparison in the terminal?

Thanks!

edited Jun 11 at 9:36

asked Jun 6 at 11:52

Wizzardzz

add a commentÂ |Â

up vote
1
down vote

favorite

I am new to shell programming, please forgive any blunder. I've been unable to find an answer to this:

I have a script that allows me to compare these variables:

FT_NBR1='?""'
FT_NBR2=rcrdmddd

My question is how can I pass the FT_NBRs variables to the script to execute the comparison in the terminal?

Thanks!

edited Jun 11 at 9:36

asked Jun 6 at 11:52

Wizzardzz

I am new to shell programming, please forgive any blunder. I've been unable to find an answer to this:

I have a script that allows me to compare these variables:

FT_NBR1='?""'
FT_NBR2=rcrdmddd

My question is how can I pass the FT_NBRs variables to the script to execute the comparison in the terminal?

Thanks!

edited Jun 11 at 9:36

asked Jun 6 at 11:52

Wizzardzz

edited Jun 11 at 9:36

asked Jun 6 at 11:52

Wizzardzz

asked Jun 6 at 11:52

Wizzardzz

asked Jun 6 at 11:52

Wizzardzz

add a commentÂ |Â

2 Answers
2

active

oldest

votes

up vote
1
down vote

accepted

You can export the variables using your shell, then they will be available in the script.

Example script:

#!/bin/bash --
echo "$test"

Export variable and run script:

$ export test=something
$ ./script
something

The way you are trying to assign values to variables will not work.

FT_NBR1='?""'
FT_NBR2=rcrdmddd

FT_NBR2 is fine, but FT_NBR1 is not valid. Have a look a single vs double quotes and special character escaping.

answered Jun 6 at 13:21

rusty shackleford

1,135115

add a commentÂ |Â

up vote
0
down vote

You can pass environmental variables to a script with setting the variables just before. The variables will not be set in the current environment, which can be useful in some cases.

script.sh:

#!/bin/bash
echo "var1: $var1"

and then call it with

$ var1=234 ./script.sh
var1: 123
$ echo "var1: $var1"
var1:

This works in bash. I don't know about general POSIX compability.

answered Jun 6 at 13:41

Hotsndot

212

add a commentÂ |Â

Your Answer

StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "106"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);

else
createEditor();

);

function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
convertImagesToLinks: false,
noModals: false,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);

);

draft saved

draft discarded

StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f448177%2fcompare-two-variables-with-a-shell-script%23new-answer', 'question_page');

);

Post as a guest

Name

2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

up vote
1
down vote

accepted

You can export the variables using your shell, then they will be available in the script.

Example script:

#!/bin/bash --
echo "$test"

Export variable and run script:

$ export test=something
$ ./script
something

The way you are trying to assign values to variables will not work.

FT_NBR1='?""'
FT_NBR2=rcrdmddd

FT_NBR2 is fine, but FT_NBR1 is not valid. Have a look a single vs double quotes and special character escaping.

answered Jun 6 at 13:21

rusty shackleford

1,135115

add a commentÂ |Â

up vote
1
down vote

accepted

You can export the variables using your shell, then they will be available in the script.

Example script:

#!/bin/bash --
echo "$test"

Export variable and run script:

$ export test=something
$ ./script
something

The way you are trying to assign values to variables will not work.

FT_NBR1='?""'
FT_NBR2=rcrdmddd

FT_NBR2 is fine, but FT_NBR1 is not valid. Have a look a single vs double quotes and special character escaping.

answered Jun 6 at 13:21

rusty shackleford

1,135115

add a commentÂ |Â

up vote
1
down vote

accepted

You can export the variables using your shell, then they will be available in the script.

Example script:

#!/bin/bash --
echo "$test"

Export variable and run script:

$ export test=something
$ ./script
something

The way you are trying to assign values to variables will not work.

FT_NBR1='?""'
FT_NBR2=rcrdmddd

FT_NBR2 is fine, but FT_NBR1 is not valid. Have a look a single vs double quotes and special character escaping.

answered Jun 6 at 13:21

rusty shackleford

1,135115

You can export the variables using your shell, then they will be available in the script.

Example script:

#!/bin/bash --
echo "$test"

Export variable and run script:

$ export test=something
$ ./script
something

The way you are trying to assign values to variables will not work.

FT_NBR1='?""'
FT_NBR2=rcrdmddd

FT_NBR2 is fine, but FT_NBR1 is not valid. Have a look a single vs double quotes and special character escaping.

answered Jun 6 at 13:21

rusty shackleford

1,135115

answered Jun 6 at 13:21

rusty shackleford

1,135115

answered Jun 6 at 13:21

rusty shackleford

1,135115

answered Jun 6 at 13:21

rusty shackleford

1,135115

add a commentÂ |Â

up vote
0
down vote

You can pass environmental variables to a script with setting the variables just before. The variables will not be set in the current environment, which can be useful in some cases.

script.sh:

#!/bin/bash
echo "var1: $var1"

and then call it with

$ var1=234 ./script.sh
var1: 123
$ echo "var1: $var1"
var1:

This works in bash. I don't know about general POSIX compability.

answered Jun 6 at 13:41

Hotsndot

212

add a commentÂ |Â

up vote
0
down vote

You can pass environmental variables to a script with setting the variables just before. The variables will not be set in the current environment, which can be useful in some cases.

script.sh:

#!/bin/bash
echo "var1: $var1"

and then call it with

$ var1=234 ./script.sh
var1: 123
$ echo "var1: $var1"
var1:

This works in bash. I don't know about general POSIX compability.

answered Jun 6 at 13:41

Hotsndot

212

add a commentÂ |Â

up vote
0
down vote

You can pass environmental variables to a script with setting the variables just before. The variables will not be set in the current environment, which can be useful in some cases.

script.sh:

#!/bin/bash
echo "var1: $var1"

and then call it with

$ var1=234 ./script.sh
var1: 123
$ echo "var1: $var1"
var1:

This works in bash. I don't know about general POSIX compability.

answered Jun 6 at 13:41

Hotsndot

212

You can pass environmental variables to a script with setting the variables just before. The variables will not be set in the current environment, which can be useful in some cases.

script.sh:

#!/bin/bash
echo "var1: $var1"

and then call it with

$ var1=234 ./script.sh
var1: 123
$ echo "var1: $var1"
var1:

This works in bash. I don't know about general POSIX compability.

answered Jun 6 at 13:41

Hotsndot

212

answered Jun 6 at 13:41

Hotsndot

212

answered Jun 6 at 13:41

Hotsndot

212

answered Jun 6 at 13:41

Hotsndot

212

add a commentÂ |Â

draft saved

draft discarded

draft saved

draft discarded

Post as a guest

Name

搜尋此網誌

mjhjmtu