Computer technology: 10 ways to generate random passwords using Linux system

Usually, everyone generates passwords that are confusing. If the complexity is not enough, it will be insecure. The complexity is enough, and you can't manually type the keyboard and type the same characters. (But usually these characters are regular), using 1password or keepass software generation is also OK, but it seems that 1password is charged, so let's play fun linux to generate random passwords to play;

One of the big advantages of the Linux operating system is that you can use up to hundreds of methods to implement it for the same thing. For example, you can generate random passwords in dozens of ways. This article describes ten ways to generate random passwords.

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

 
 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 used everyday. Only the first 32 characters of the result are output here: 
 
 < /dev/urandom tr -dc _A-Z-a-z-0-9 |
 Head -c${1:-32};echo 

 The result is as follows:
 
 pDj0Xwz7exD_Qb5B27BwWsM1hrF3a7cJ 

 3. Use Openssl's random function
 
 openssl rand -base64 32 

 The result is as follows:
 
 rYJWqJlTLAYeX3j7nCbir20h1k/0CnqLNEuNyTScfKo= 

 4. This method is similar to the previous urandom, but it works backwards 
 
 tr -cd '[:alnum:]' < ; /dev/urandom |
  Fold -w32 |
  Head -n1;echo 

 The result is as follows: 
 
 tpgudzF7sqtU4yyW2LVhmUQOZIQi87 

 5. Using the string command, it takes a file from Output printable string
 
 strings /dev/urandom |
  Grep -o '[[:alnum:]]' |
  Head -n 32 |
  Tr -d '\ '; echo 

 The result is as follows: 
 
 W4v1iQtkmQ8sIDd9jxDQNpg8HPMOZ8 

 6. This is using urandom A simpler version 
 
 < /dev/urandom tr -dc _A-Zaz-0-9 |
  Head -c32;echo 

 The result is as follows: 
 
 rMDlGSPN_bm-IZVFWz9BEi0rF-jIy6gs 

 7. 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 one Password that can be entered with the left hand
 
 </dev/urandom tr -dc '12345!@#$%qwertQWERTasdfgASDFGzxcvZZXCVB' |
  Head -c32; echo 

 The result is as follows: 
 
 VTG3#TR4sAgXg3Z%##WZG4ZQ@GZ$wdqF 

 9. If you use one of the above methods each time, a better way is to save it as a function. If you do this, you can generate a random password using randpw at any time after running the command for the first time. Maybe you 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 Finally, this method of generating random passwords is the simplest. It can also be run under Windows with Cygwin installed. It can also be run under Mac OS X. I'm sure someone will complain that the password generated by this method has no other way to randomize it. But in fact, if you use all the strings generated by it as passwords, then the password is random enough 
 
 date |
  Md5sum 

 The result is as follows: 
 
 e0d057b46a9a78346cbd94b25e574e79 - 

 
 
 
 date |
  base64 
 
 generate the following results: 
 
 
 MjAxNOW5tCAwN + aciCAzMeaXpSDmmJ /mnJ /lm5sgMTc6MDA6MzYgQ1NUCg == 
 
 
 
 
 ifconfig |
  md5sum 
 
 
 generates the following results: 
 
 
 
 7c4243742aa515d45c12deca31428a95 - 
 
 
 
 
 Even if you want to generate a nuclear launch The password is OK, here is an example of generating a long password; 
 
 
 
 ifconfig |
  base64 
 
 
 to generate the following results: 
 
 
 
 ZW0xICAgICAgIExpbmsgZW5jYXA6RXRoZXJuZXQgIEhXYWRkciA3ODoyQjpDQjoyQjpCMDo5NCAg 
 
 CiAgICAgICAgICBpbmV0IGFkZHI6MTkyLjE2OC4zLjUgIEJjYXN0OjE5Mi4xNjguMy4yNTUgIE1h 
 
 c2s6MjU1LjI1NS4yNTUuMAogICAgICAgICAgaW5ldDYgYWRkcjogZmU4MDo6N2EyYjpjYmZmOmZl 
 
 MmI6YjA5NC82NCBTY29wZTpMaW5rCiAgICAgICAgICBVUCBCUk9BRENBU1QgUlVOTklORyBNVUxU 
 
 SUNBU1QgIE1UVToxNTAwICBNZXRyaWM6MQogICAgICAgICAgUlggcGFja2V0czoyMDY3NTY0IGVy 
 
 cm9yczowIGRyb3BwZWQ6MCBvdmVycnVuczowIGZyYW1lOjAKICAgICAgICAgIFRYIHBhY2tldHM6 
 
 ODg2NDUgZXJyb3JzOjAgZHJvcHBlZDowIG92ZXJydW5zOjAgY2FycmllcjowCiAgICAgICAgICBj 
 
 b2xsaXNpb25zOjAgdHhxdWV1ZWxlbjoxMDAwIAogICAgICAgICAgUlggYnl0ZXM6MjAzNDkzNTEx 
 
 ICgxOTQuMCBNaUIpICBUWCBieXRlczozMjUyNzUxNiAoMzEuMCBNaUIpCgpsbyAgICAgICAgTGlu 
 
 ayBlbmNhcDpMb2NhbCBMb29wYmFjayAgCiAgICA gICAgICBpbmV0IGFkZHI6MTI3LjAuMC4xICBN