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Old 08-22-2008, 10:00 AM   #1
ilo
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Registered: Jan 2008
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sed or awk


Hello All, I am trying to program a script to change the ip.

I would like that the user enters 67.50.25.25
and since we use /24 masks I can just "calculate" from sed or awk

the gateway 67.50.25.1 the network 67.50.25.0 and the broadcast 67.50.25.255.

Any help would be appreciated.
 
Old 08-22-2008, 10:38 AM   #2
matthewg42
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Registered: Oct 2003
Location: UK
Distribution: Kubuntu 12.10 (using awesome wm though)
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You can do this quite easily with a shell script and internal string manipulation - no need to invoke other processes:
Code:
#!/bin/bash

read -p "enter the IP> " ip
slash24root="${ip%.*}"
gateway="$slash24root.1"
network="$slash24root.0"
broadcast="$slash24root.255"

printf "%-20s = %s\n" "ip" "$ip"
printf "%-20s = %s\n" "gateway" "$gateway"
printf "%-20s = %s\n" "network" "$network"
printf "%-20s = %s\n" "broadcast" "$broadcast"
 
  


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