To create a random number method:
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In Linux, a device/dev/urandom is used to generate random sequence of numbers. Using this device we can generate random strings when needed.
For example, we're going to produce a 8-digit random combination of letters and numbers, so you can:
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[Linux@test/tmp]$ cat/dev/urandom | head-1 | md5sum | Head-c 8
6baf9282
2~~~~
In fact, Linux has already provided a system environment variable.
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[Chengmo@centos5 shell]$ Echo $RANDOM
66918
[Chengmo@centos5 shell]$ Echo $RANDOM
10092
There may be doubt, if more than 5 digits of random number how to get it?
10 digits, use% of 10
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echo $ ((random%10))
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
VI passwd.sh
#创建一个 10-bit random password ...
#!/bin/bash
A= (a b c d e a B c D e F @ $% ^ 0 1 2 3 4 5 6 7 8 9)
For ((i=0;i<10;i++));d o
Echo-n ${a[$RANDOM% ${#a [@]}]}
Done
Echo
Execute script:
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[Root@2 shell]# SH passwd.sh
Bf8366c@13
VI useradd.sh
#创建5个账号, a random password is referenced.
#!/bin/bash
I=1
While [$i-le 5]
Todo
Useradd red$i
A= ' sh./passwd.sh '
echo "red$i: $a" >> sumuserpasswd
echo "~~~~~~~~~~~" >> sumuserpasswd
echo red$i: $a |chpasswd
# echo $a | Passwd–-stdin Red "$i"
Let i++
Done
Executive: SH useradd.sh
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[Root@2 shell]# Cat/etc/passwd|grep Red
Red1:x:515:515::/home/red1:/bin/bash
Red2:x:516:516::/home/red2:/bin/bash
Red3:x:517:517::/home/red3:/bin/bash
Red4:x:518:518::/home/red4:/bin/bash
Red5:x:519:519::/home/red5:/bin/bash
#查看结果
[Root@2 shell]# Cat SUMUSERPASSWD
Red1: $Ca 7%298d2
~~~~~~~~~~~~~
Red2:eeabbb7fb4
~~~~~~~~~~~~~
Red3:%3e385cece
~~~~~~~~~~~~~
red4:3@f% @B0584
~~~~~~~~~~~~~
Red5:adee^6bf$f
#测试一下
[Root@2 shell]# su red1
[Red1@2 shell]$ su red2
Password:
[Red2@2 shell]$
We can also use HTML to display our results:
HTML Table Code
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<body>
<tableborder= ' 1 ' >
<tr>
<td>user</td>
<td>passwd</td>
</tr>
<tr>
<td>test1</td>
<td>123123</td>
</tr>
<tr>
<td>test2</td>
<td>aaabbb</td>
</tr>
</table>
</body>
You can guide your account and password to the Web page in HTML syntax.
Copy Code code as follows:
Temp=index.html
echo "echo "<tableborder=\" 1\ ">" >> $TEMP
echo "<tr><td>username</td><td>password</td></tr>>> $TEMP
echo "<tr><td> $i </td><td> $a </td></tr>" >> $TEMP
echo "</table></body>echo "Open index.html"
