linux - Small install script in sh -

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i programmed small installation program in sh.

code:

#!/bin/sh  echo $ 1  if [ "$1" ! = "install"];   echo "why not install?  else  echo "installing ..."  fi

and throws error:

install

[: 10: missing ]

installing ...

edit: rolled incoperation of answers question.

if [$1 != "install"];

should be

if [ "$1" != "install" ];

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