In /usr/bin/itpp-config line 30: exit $1 ^-- SC2086: Double quote to prevent globbing and word splitting. Did you mean: exit "$1" In /usr/bin/itpp-config line 39: -*=*) optarg=`echo "$1" | sed 's/[-_a-zA-Z0-9]*=//'` ;; ^-- SC2006: Use $(...) notation instead of legacy backticked `...`. Did you mean: -*=*) optarg=$(echo "$1" | sed 's/[-_a-zA-Z0-9]*=//') ;; In /usr/bin/itpp-config line 40: *) optarg= ;; ^----^ SC2034: optarg appears unused. Verify use (or export if used externally). For more information: https://www.shellcheck.net/wiki/SC2034 -- optarg appears unused. Verify use... https://www.shellcheck.net/wiki/SC2086 -- Double quote to prevent globbing ... https://www.shellcheck.net/wiki/SC2006 -- Use $(...) notation instead of le...