Batch modify the Linux system password

Interception host IP address of the last digit, matching a defined set of custom code, modify the host account password using chpasswd

Screenshot host IP

[root@web01 ~]# ip addr 
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ens160: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 00:0c:29:b1:16:ba brd ff:ff:ff:ff:ff:ff
    inet 192.168.31.210/24 brd 192.168.31.255 scope global noprefixroute ens160
       valid_lft forever preferred_lft forever
    inet6 fe80::473e:f49:a714:1ca4/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
3: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default 
    link/ether 02:42:c0:7a:e5:3f brd ff:ff:ff:ff:ff:ff
    inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
       valid_lft forever preferred_lft forever
4: ens192: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 00:0c:29:b1:16:c4 brd ff:ff:ff:ff:ff:ff
    inet 192.168.31.115/24 brd 192.168.31.255 scope global noprefixroute dynamic ens192
       valid_lft 57401sec preferred_lft 57401sec
    inet6 fe80::30aa:1cb4:f641:c73f/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
5: ens224: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 00:0c:29:b1:16:ce brd ff:ff:ff:ff:ff:ff
    inet 192.168.31.114/24 brd 192.168.31.255 scope global noprefixroute dynamic ens224
       valid_lft 54676sec preferred_lft 54676sec
    inet6 fe80::6dac:7783:8994:35ce/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
6: nm-team: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 22:12:15:c8:40:51 brd ff:ff:ff:ff:ff:ff
[root@web01 ~]# ip addr |grep 192.168
    inet 192.168.31.210/24 brd 192.168.31.255 scope global noprefixroute ens160
    inet 192.168.31.115/24 brd 192.168.31.255 scope global noprefixroute dynamic ens192
    inet 192.168.31.114/24 brd 192.168.31.255 scope global noprefixroute dynamic ens224

[root@web01 ~]# ip addr |grep 192.168|grep -v dynamic
    inet 192.168.31.210/24 brd 192.168.31.255 scope global noprefixroute ens160
[root@web01 ~]# ip addr |grep 192.168|grep -v dynamic|awk '{print $2}'
192.168.31.210/24
[root@web01 ~]# ip addr |grep 192.168|grep -v dynamic|awk '{print $2}'|cut -d  / -f 1
192.168.31.210
[root@web01 ~]# ip addr |grep 192.168|grep -v dynamic|awk '{print $2}'|cut -d  / -f 1|grep -o .$
0
[root@web01 ~]#

Bulk edit script

#！/bin/bash
A='ip addr |grep 192.168|grep -v dynamic|awk '{print $2}'|cut -d  / -f 1|grep -o .$'
if [ $A = 0 ]

pass_login='Yqllm@0)'
pass_root='Gslcl@0)'

elif [$A = 1]

pass_login='Yqylm@1!'
pass_root='Gsycl@1!'

elif [$A = 2]

pass_login='Yqelm@2@'
pass_root='Gsecl@2@'

elif [$A = 3]

pass_login='Yqslm@3#'
pass_root='Gsscl@3#'

elif [$A = 4]

pass_login='Yqslm@4$'
pass_root='Gsscl@4$'

elif [$A = 5]

pass_login='Yqwlm@5%'
pass_root='Gswcl@5%'

elif [$A = 6]

pass_login='Yqllm@6^'
pass_root='Gslcl@6^'

elif [$A = 7]

pass_login='Yqqlm@7&'
pass_root='Gsqcl@7&'

elif [$A = 8]

pass_login='Yqblm@8*'
pass_root='Gsbcl@8*'

elif [$A = 9]

pass_login='Yqjlm@9('
pass_root='Gsjcl@9('

fi

echo "root password is $pass_root"
echo "login password is $pass_login"
echo root:$pass_root|chpasswd
echo login:$pass_root|chpasswd

chage -l root 
chage -l login

Batch modify the Linux system password

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