How to store an output of shell script to a variable in Unix

Question

i have a shell script  script sh  which gives output as  success  or  Failed  when i execute in unix window  Now i want to store the output of script sh into a unix command variable  say  a    output of script sh

User · Answer

export a   script sh    Hope this helps  Note there are no spaces between variable and    To echo the output  echo  a

User · Answer

Two simple examples to capture output the pwd command     b   pwd    echo  b  home user1   or    a  pwd    echo  a  home user1   The first way is preferred  Note that there can t be any spaces after the   for this to work   Example using a short script      bin bash  echo  hi there    then       so sh hi there   a   so sh    echo  a hi there   In general a more flexible approach would be to return an exit value from the command and use it for further processing  though sometimes we just may want to capture the simple output from a command

User · Answer

Suppose you want to store the result of an echo command  echo hello    x   echo hello    echo   x  world      output     hello   hello world

User · Answer

You should probably re-write the script to return a value rather than output it   Instead of   a    script sh     Now a is a string  either  success  or  Failed  case   a  in    success  echo script succeeded      Failed  echo script failed   esac   you would be able to do   if script sh  gt   dev null  then     echo script succeeded else     echo script failed fi   It is much simpler for other programs to work with you script if they do not have to parse the output   This is a simple change to make   Just exit 0 instead of printing success  and exit 1 instead of printing Failed   Of course  you can also print those values as well as exiting with a reasonable return value  so that wrapper scripts have flexibility in how they work with the script

User · Answer

You need to start the script with a preceding dot  this will put the exported variables in the current environment      bin bash     export output  SUCCESS    Then execute it like so  chmod  x  tmp test sh    tmp test sh   When you need the entire output and not just a single value  just put the output in a variable like the other answers indicate

[shell] How to store an output of shell script to a variable in Unix?

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