10 methods for generating random passwords using Linux

10 methods for generating random passwords using Linux

 

In general, it is confusing to generate passwords. If the complexity is insufficient, it will be insecure, it is too complex to press the keyboard to play the same character (but these characters are usually regular). You can also use the 1 password or keepass software to generate it, however, it seems that 1 password is charged. In this case, let's have fun using linux to generate random passwords;

A major advantage of Linux is that you can implement the same thing in hundreds of ways. For example, you can generate a random password in dozens of ways. This article describes ten methods to generate a random password.

1. Use the SHA algorithm to encrypt the date and output the first 32 characters:

 
 

  
  
date +%s |sha256sum |base64 |head -c 32 ;echo 
 
 

The result is as follows:

 
 

  
  
ZTNiMGM0NDI5OGZjMWMxNDlhZmJmNGM4 
 
 

2. Use embedded/dev/urandom and filter out characters that are not commonly used.. Here, only the first 32 characters of the output result are returned:

 
 

  
  
< /dev/urandom tr -dc _A-Z-a-z-0-9 |head -c${1:-32};echo 
 
 

The result is as follows:

 
 

  
  
pDj0Xwz7exD_Qb5B27BwWsM1hrF3a7cJ 
 
 

3. Use Random Functions of openssl

 
 

  
  
openssl rand -base64 32 
 
 

The result is as follows:

 
 

  
  
rYJWqJlTLAYeX3j7nCbir20h1k/0CnqLNEuNyTScfKo= 
 
 

4. This method is similar to the previous urandom.But it works reversely.

 
 

  
  
tr -cd '[:alnum:]' < /dev/urandom | fold -w32 | head -n1;echo 
 
 

The result is as follows:

 
 

  
  
tpgudzF7sqtU4yyW2LVhmUQOZIQi87 
 
 

5. Use the string commandWhich outputs printable strings from a file

 
 

  
  
strings /dev/urandom | grep -o '[[:alnum:]]' | head -n 32 | tr -d '\n'; echo 
 
 

The result is as follows:

 
 

  
  
W4v1iQtkmQ8sIDd9jxDQNpg8HPMOZ8 
 
 

6. This is a simpler version of urandom.

 
 

  
  
< /dev/urandom tr -dc _A-Z-a-z-0-9 | head -c32;echo 
 
 

The result is as follows:

 
 

  
  
rMDlGSPN_bm-IZVFWz9BEi0rF-jIy6gs 
 
 

7. Use a very useful dd command

 
 

  
  
dd if=/dev/urandom bs=1 count=32 2>/dev/null | base64 -w 0 | rev | cut -b 2- | rev 
 
 

The result is as follows:

 
 

  
  
9+0RUd4U3HmSdMlgD7j0sf/r09MZFDVBS28W+pO2WcA 
 
 

8. You can even generate a password that can be entered with only the left hand.

 
 

  
  
</dev/urandom tr -dc '12345!@#$%qwertQWERTasdfgASDFGzxcvbZXCVB' | head -c32; echo 
 
 

The result is as follows:

 
 

  
  
VTG3#TR4sAgXg3Z%##WZG4ZQ@GZ$wdqF 
 
 

9. If you use the above method every time, it is better to save it as a function. If this is done, you can use randpw to generate a random password at any time after the command is run for the first time. Maybe youYou can save it to your ~ /. Bashrc File

 
 

  
  
randpw(){ < /dev/urandom tr -dc _A-Z-a-z-0-9 | head -c${1:-16};echo;} 
 
 

The result is as follows:

 
 

  
  
vgBX8cNo950RiykZRpPYa4BvbAvZbY_x 
 
 

10. The last method to generate a random password is the simplest.It can also run under Windows with Cygwin installed. It can also be run in Mac OS X. I am sure someone will complain that the password generated in this method is not random by other methods. But in fact, if you use all the strings it generates as the password, the password is random enough.

 
 

  
  
date | md5sum 
 
 

The result is as follows:

 
 

  
  
e0d057b46a9a78346cbd94b25e574e79 - 
 
 

 

 
 

  
  
date | base64 
 
 

The result is as follows:

 
 

  
  
MjAxNOW5tCAwN+aciCAzMeaXpSDmmJ/mnJ/lm5sgMTc6MDA6MzYgQ1NUCg==  
 
 

 
 

  
  
ifconfig | md5sum 
 
 

The result is as follows:

 
 

  
  
7c4243742aa515d45c12deca31428a95 - 
 
 

You can even generate a nuclear bomb launch password. The following is an example of a growth password;

 
 

  
  
ifconfig | base64 
 
 

The result is as follows:

 
 

  
  
ZW0xICAgICAgIExpbmsgZW5jYXA6RXRoZXJuZXQgIEhXYWRkciA3ODoyQjpDQjoyQjpCMDo5NCAg  
  
  
CiAgICAgICAgICBpbmV0IGFkZHI6MTkyLjE2OC4zLjUgIEJjYXN0OjE5Mi4xNjguMy4yNTUgIE1h  
  
  
c2s6MjU1LjI1NS4yNTUuMAogICAgICAgICAgaW5ldDYgYWRkcjogZmU4MDo6N2EyYjpjYmZmOmZl  
  
  
MmI6YjA5NC82NCBTY29wZTpMaW5rCiAgICAgICAgICBVUCBCUk9BRENBU1QgUlVOTklORyBNVUxU  
  
  
SUNBU1QgIE1UVToxNTAwICBNZXRyaWM6MQogICAgICAgICAgUlggcGFja2V0czoyMDY3NTY0IGVy  
  
  
cm9yczowIGRyb3BwZWQ6MCBvdmVycnVuczowIGZyYW1lOjAKICAgICAgICAgIFRYIHBhY2tldHM6  
  
  
ODg2NDUgZXJyb3JzOjAgZHJvcHBlZDowIG92ZXJydW5zOjAgY2FycmllcjowCiAgICAgICAgICBj  
  
  
b2xsaXNpb25zOjAgdHhxdWV1ZWxlbjoxMDAwIAogICAgICAgICAgUlggYnl0ZXM6MjAzNDkzNTEx  
  
  
ICgxOTQuMCBNaUIpICBUWCBieXRlczozMjUyNzUxNiAoMzEuMCBNaUIpCgpsbyAgICAgICAgTGlu  
  
  
ayBlbmNhcDpMb2NhbCBMb29wYmFjayAgCiAgICAgICAgICBpbmV0IGFkZHI6MTI3LjAuMC4xICBN  
  
  
YXNrOjI1NS4wLjAuMAogICAgICAgICAgaW5ldDYgYWRkcjogOjoxLzEyOCBTY29wZTpIb3N0CiAg  
  
  
ICAgICAgICBVUCBMT09QQkFDSyBSVU5OSU5HICBNVFU6MTY0MzYgIE1ldHJpYzoxCiAgICAgICAg  
  
  
ICBSWCBwYWNrZXRzOjU2OTkzMSBlcnJvcnM6MCBkcm9wcGVkOjAgb3ZlcnJ1bnM6MCBmcmFtZTow  
  
  
CiAgICAgICAgICBUWCBwYWNrZXRzOjU2OTkzMSBlcnJvcnM6MCBkcm9wcGVkOjAgb3ZlcnJ1bnM6  
  
  
MCBjYXJyaWVyOjAKICAgICAgICAgIGNvbGxpc2lvbnM6MCB0eHF1ZXVlbGVuOjAgCiAgICAgICAg  
  
  
ICBSWCBieXRlczozMzEzMDcxOSAoMzEuNSBNaUIpICBUWCBieXRlczozMzEzMDcxOSAoMzEuNSBN  
  
  
aUIpCgo=