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  • you could use tr to get rid of it like tr -d 'ﮛ' so maybe like ./main.sh 2>&1 | tr -d 'ﮛ' | tee -a out_file
    – barlop
    Commented Apr 6, 2018 at 17:55
  • We need details of the scripts and the unwanted characters. Please expand your question to include them.
    – AFH
    Commented Apr 6, 2018 at 18:00
  • Try using dialog --stdout option, dialog --stdout ...
    – Paulo
    Commented Apr 7, 2018 at 5:15