Numer przyrostowy Bash
i=$((i+1))
((i=i+1))
let "i=i+1"
Blue-eyed Beaver
i=$((i+1))
((i=i+1))
let "i=i+1"
#Increment varible in bash script
((i++))
((i=i+1))
i=$((i+1))
let "i++"
let "i=i+1"
let "i++"