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@jbeda
jbeda / gist:16191ad2cec4835de40b
Last active November 4, 2024 08:46
IP CIDR math in bash
function increment_ipv4 {
local ip_base=$1
local incr_amount=$2
local -a ip_components
local ip_regex="([0-9]+).([0-9]+).([0-9]+).([0-9]+)"
[[ $ip_base =~ $ip_regex ]]
ip_components=("${BASH_REMATCH[1]}" "${BASH_REMATCH[2]}" "${BASH_REMATCH[3]}" "${BASH_REMATCH[4]}")
ip_dec=0
local comp
for comp in "${ip_components[@]}"; do