Centos6 multi-segment Ip add script and centos6 multi-segment ip script

Centos6 multi-segment Ip add script and centos6 multi-segment ip script

#! /Bin/bash

Export device = 'ifconfig | grep eth0 | head-n 1 | awk '{print ($1 )}''
Export ipcfg_pre = "/etc/sysconfig/network-scripts/ifcfg-eth1-range"
Awktmp = 'mktemp'
Msg = 'mktemp'
Ip_txt = 'mktemp'
Ifcfgs = "$ (find $ {ip;_pre %/*}-name $ {ip;_pre ##*/}*)"
If test! -Z "$ ifcfgs"; then
Echo "found that the following existing configuration files are deleted (yes/no )? "
Echo "$ ifcfgs"
Select var in "yes" "no"
Do
If test "$ var" = "yes"; then
Rm-f $ ifcfgs
Break;
Else
Break;
Fi

Done
Fi

# Save the script to a temporary file and no longer use the. awk file.

Cat> $ awktmp <EOF
#! /Usr/bin/awk-f
BEGIN {
Ip1__pre = "$ {ip1__pre }"
# You need to modify ip1__pre as the path prefix.
Device = ENVIRON ["device"]
Clone_num = 1;
Numofpc [24] = 253
Numofpc [24] = 125
Numofpc [26] = 61
Numofpc [27] = 29
Numofpc [28] = 13
Numofpc [29] = 5
}
Function ip_str (iplist ){
Return sprintf ("% s. % s", ip_list [1], ip_list [2], ip_list [3], ip_list [4]);
}
Function gen_mask (num, mask_bin, _ ARGVEND _, sum, bits ){
# Convert a mask from a number to an array
_ I = 1;
Mask_bin [1] = 0;
For (; _ I * 8 <= num & _ I <= 4; _ I ++ ){
Mask_bin [_ I] = 255;
}
Bits = num-(_ i-1) * 8;
Sum = 0;
For (; bits> 0; bits --){
Sum = sum + 2 ^ (8-bits );
}
Mask_bin [_ I] = sum;
_ I ++;
For (; _ I <= 4; _ I ++ ){
Mask_bin [_ I] = 0;
}
}
{
Ipfile = sprintf ("% s", ip1__pre, NR );
Split (\ $0, ip ,"/");
Ip_mask = ip [2];
Split (ip [1], ip_list ,".");
# The ip_list list stores the four ip byte values
Ip_start = ip_list [4] + 2;
Ip_end = ip_start + numofpc [ip_mask]-1;
Printf ("DEVICE = % s \ n", device)> ipfile
Printf ("BOOTPROTO = static \ n")> ipfile
Printf ("CLONENUM_START = % d \ n", clone_num)> ipfile
Ip_list [4] = ip_start;
Printf ("IPADDR_START = % s \ n", ip_str (ip_list)> ipfile
Ip_list [4] = ip_end;
Printf ("IPADDR_END = % s \ n", ip_str (ip_list)> ipfile
Clone_num + = numofpc [ip_mask];
Printf ("ONBOOT = yes \ n")> ipfile
Gen_mask (ip_mask, ip_list)
Netmask = ip_str (ip_list)
Printf ("NETMASK = % s \ n", netmask)> ipfile
}

EOF
Chmod a + x $ awktmp

Msg = 'mktemp'
Cat> $ msg <EOF
Enter the IP address and mask for one row per line (blank lines are not allowed)
For example:
45.34.89.40/29
23.91.3.0/28
23.91.8.32/28
23.91.18.160/28
23.91.28.128/28
EOF

Vi + ":! Cat $ msg "$ ip_txt
# Service network restart

Test-e $ ip_txt & awk-f $ awktmp $ ip_txt
Service network restart
Rm-f $ awktmp $ msg $ ip_txt
Rm-f ipcfg. sh
========================================================== ==================

This script only applies

45.34.89.40/29
23.91.3.0/28
23.91.8.32/28
23.91.18.160/28
23.91.28.128/28

Add IP segments in this format. Check whether the script Nic name is consistent with the machine Nic name.

Use method, named ipcfg. sh
1. You will be prompted whether the IP file already exists, so you can choose whether to delete it. We only use it for the first time to add. Try not to add more.
2. Press enter, then press I to enter the editing mode, and enter the IP segment. A single line of iP segments. Do not have spaces. Save.