If you are a Linux user you can use your Linux Command line to create a random, powerful password which can't be guessed by anyone.
First of all you must have "pwgen" to generate new passwords using Linux Command line. When you type pwgen in your terminal it should show some passwords which has generated randomly. If it show these message similar to this "bash: pwgen: command not found" when you type pwgen, it means you didn't have pwgen installd in your system. So, use your "package manager" to install it. After installing pwgen, you can type pwgen and view some random passwords. You can use pwgen with some options to meet your password requirements. use "pwgen --help" to see available options on the command. This command generates random passwords and you can't see the same password twice by using the pwgen command with the same options.
Here is the syntax you could use this pwgen command to generate passwords.
pwgen [ OPTIONS ] [ pw_length ] [ num_pw ]
- [ OPTIONS ] -means availabe customizations for pwgen. you can use several options at one time, but all of theose options should not be seperated by spaces or something. but when you start using options, it should contain - mark before the first option that you call.
- [ pw_length ] is the character length of the password that you need.
- [ num_pw ] here you can say the number of passwords needed.
Options supported by pwgen:
-c or --capitalize
Include at least one capital letter in the password
-A or --no-capitalize
Don't include capital letters in the password
-n or --numerals
Include at least one number in the password
-0 or --no-numerals
Don't include numbers in the password
-y or --symbols
Include at least one special symbol in the password
-s or --secure
Generate completely random passwords
-B or --ambiguous
Don't include ambiguous characters in the password
-h or --help
Print a help message
-H or --sha1=path/to/file[#seed]
Use sha1 hash of given file as a (not so) random generator
Print the generated passwords in columns
Don't print the generated passwords in columns
-v or --no-vowels
Do not use any vowels so as to avoid accidental nasty words
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