I'm writing a `ksh` script, and I'd like to use a command define by an alias in my `.profile` file, in my script. I tried this command in the folder containing my script, and it works. However, in my script, I've: `[command] not found`.

How can I solve this? My command just make a ls of a repository, then I'm doing in my script : 

    [command]| grep ... | { IFS== read -r var1 x && IFS== read -r var2 x; }